Consulta: subjectFacets:"Phytosociology"
Registros recuperados: 70
Data/hora: 10/06/2024 17:04:28

Relationship among grain-size, plant communities, and fluvial and eolian processes in a piedmont of the central Andes in Argentina
Provedor de dados: 67
Autores: González Loyarte,María M.
The relationship among modern geomorphological processes, grain-size of surface sediments, and vegetation was analyzed in an alluvial fan in the piedmont of the Cordillera Frontal (Andes Mountains). Statistical parameters of grain-size distribution were calculated according to a standard graphical method. Plant communities were studied by applying a standard floristic-ecological method. A sensitivity analysis of grain-size parameters and plant communities in relation to geomorphological processes was made, based on literature, to compare results. Indicator species of fluvial, eolian and soil erosion processes were identified. Contemporary surface modifications by fluvial and eolian processes produce distinct surface sediment size parameters (mean diameter,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grain-size analysis; Plant communities; Fluvial/eolian processes; Phytosociology; Indicator species.
Ano: 2003
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2003000100004

Infestação de plantas daninhas em café solteiro e consorciado com braquiaria em diferentes épocas em sistema agroecológico.
Provedor de dados: 14
Autores: MELO, T. S.; SILVA, L. B. X. da; MARQUES, R. F.; CONCENCO, G.; MOTTA, I. de S.
bitstream/item/148530/1/20-infestacao.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Fitossociologia; Vegetal cover.; Agricultura Sustentável; Cobertura Vegetal.; Phytosociology; Sustainable agriculture.
Ano: 2016
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1054302

Fitossociologia de uma mata de galeria na Fazenda Sucupira do Cenargen, Brasilia/DF.
Provedor de dados: 14
Autores: SAMPAIO, A. B.; NUNES, R. V.; WALTER, B. M. T.
bitstream/item/177038/1/ID-2546.pdf
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Diversidade; Diversity; Gallery forest; Mata Ciliar; Vegetação; Phytosociology.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/182834

Macrophytobenthos des platiers rocheux intertidaux et semi-exposés da la région de Safi-Essaouira (Maroc occidental)
Provedor de dados: 5
Autores: Birje, J; Verlaque, M; Poydenot, F.
In 1990, a study of the phytobenthos of the rocky intertidal platforms in the Safi-Essaouira region (Sidi Boulbra, Western Morocco) was carried out at three sites. The intertidal zonation was analysed along permanent transects, and a qualitative and quantitative study of two characteristic units of the eulittoral vegetation - the vegetation belt of Fucus spiralis and the communities of Florideophyceae - was made. One hundred and twenty-nine macroalgal taxa and three phases were listed: 19 Ulvophyceae, 19 Fucophyceae, 1 Bangiophyceae and 93 Florideophyceae. The intertidal communities of the area are typical of semi-exposed and unpolluted platforms of Western Morocco, in the eulittoral zone, most of the typical Fucales that occur along the NE Atlantic coasts...
Tipo: Text
Palavras-chave: Macroalgae; Phytosociology; Intertidal zone; Western Morocco; Atlantic.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00096/20726/18363.pdf

Ecology of naturalized invasive species Lindernia dubia (L.) Pennell in the Netherlands
Provedor de dados: 16
Autores: Simons, E.L.A.N.; Jansen, M.G.M.
Lindernia dubia (L.) Pennell, a North American species, is still a rare and ephemerical neophyte in the Netherlands, but is invading the country rapidly now. We expect it to become a threat to plant biodiversity in Dutch wetlands. To describe its ecological and phytosociological position and assess its possible risk status we investigated known sites in the Netherlands. Being a pioneer species on open, muddy soil, more or less rich in nutrients, more or less acid, it occurs in different phytosociological classes: Littorelletea uniflorae, Phragmitetea, Isoeto-Nanojuncetea and Bidentetea tripartitae. We consider the species as possibly harmfull to vegetations belonging to the Littorelletea uniflorae and some associations of the Isoeto-Nanojuncetea, as those...
Tipo: Article / Letter to the editor
Palavras-chave: Lindernia dubia; Invasive alien species; Phytosociology; Wetlands; Littorelletea uniflorae; Isoeto-Nanojuncetea; Bidentetea tripartitae.
Ano: 2018
URL: http://www.repository.naturalis.nl/record/650112

Comparative study of phytosociological structure of two fragments of Caatinga in different levels of conservation
Provedor de dados: 190
Autores: Calixto Júnior, João Tavares; Drumond, Marcos Antônio.
The objective of this work was the comparison of vegetation structure of two Caatinga fragments with primary and secondary levels of ecological succession, located at Embrapa Semiarido, Petrolina, State of Pernambuco, Brazil. For floristic survey it was used the method of plots, where 10 sampling units of 8 m x 40 m randomly distributed were plotted. All living individuals with diameter at ground level (DGL) ≥ 3 cm were inventoried and also measured their total heights. We observed significant differences in the diametric structure, but the distribution of hypsometric frequency showed that the majority of individuals in both areas were small-sized (&lt; 5 m). Through similarity analysis and principal coordinates, we observed the formation of three distinct...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Thorny deciduous vegetation; Phytosociology; Ecological sucession Engenharia Florestal  Recursos Floretais  Fitossociologia Vegetação caducifólia espinhosa; Fitossociologia; Sucessão ecológica.
Ano: 2014
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/670

Different sizes of the smallest individual sampled and their interpretations: case study in the seasonally dry forest
Provedor de dados: 190
Autores: Arruda, Daniel Meira; Batista, Márcio Luiz; Simão, Marcos Vinicius Ribeiro de Castro; Duque-Brasil, Reinaldo; Ferreira-Júnior, Walnir Gomes; Schaefer, Carlos Ernesto Gonçalves Reynald.
The dry forests, widely distributed in Brazil, are formations subject to different sampling method. Consequently, the data generated may affect the comparison among other vegetation formations. Therefore, this study presents and discusses changes caused by sampling vegetation using circumference at soil height (CSH) ≥ 10 cm and circumference at breast height (CBH) ≥ 15 cm. Different criteria provide an ambiguous vision of a same forest fragment, resulting in different structure and species richness.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytosociology; Sampling methodology; Seasonally Tropical Dry Forest; Arboreal Caatinga Fitossociologia Fitossociologia; Métodos de amostragem; Mata Seca; Caatinga Arbórea.
Ano: 2012
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/380

Natural regeneration layer of a restored forest with 40 years old
Provedor de dados: 190
Autores: Miranda Neto, Aurino; Martins, Sebastião Venâncio; Silva, Kelly Almeida; Gleriani, José Marinaldo.
The objective of this study was to evaluate the natural regeneration, to characterize the syndromes of seed dispersal and successional classes, and the parameters of relative humidity, temperature and luminosity of a restored forest through planting, with 40 years old, in Viçosa, MG, Brazil. It was registered 33 families, 102 species plus one morphotype (vines) and 1,938 individuals, with high diversity (H '= 3.56) and low ecological dominance (J' = 0.77), higher percentage of early secondary successional category, at the species level (33.3%), and late secondary, level of individuals (37%) and predominance of the zoochorous dispersion. The layer of forest regeneration restored reached similar parameters to those found in natural semideciduous forests in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest restoration; Phytosociology; Understory Recursos Florestais; Engenharia Florestal; Restauração Florestal Fitossociologia; Restauração florestal; Sub-bosque.
Ano: 2012
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/369

Growth and Accumulation of Nutrients by Weeds, in Maize and Legumes Intercrops
Provedor de dados: 87
Autores: NOLLA,A.; JUCKSH,I.; CASTALDO,J.H.; ALVARENGA,R.C.; ALBRECHT,L.P.
ABSTRACT: The presence of weeds on fields is a concern for farmers, due to competition with the commercial crops, reducing yields. The intercropping of maize with legumes provides weed control; after senescence, the nutrients accumulated by plants are released, recycling nutrients. The study of plant species and their diversity is called phytosociology. This study aimed at evaluating the accumulation of dry phytomass by maize intercropped with legumes and weeds species, and at evaluating nutrient cycling and the phytosociology of weeds. The experiment consisted of maize intercropped with legumes cover crops: jack-beans, Brazilian jack-beans, velvet bean, lablab-beans, and pigeon pea, and the control treatment (maize without intercrop), all without chemical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Green manure; Phytosociology; Jack beans; Modified importance value index; Velvet bean.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100290

Infestation of weed species in pre-planting of soybean in succession to winter crops
Provedor de dados: 87
Autores: Concenço,G.; Silva,C.J.; Tomazi,M.; Correia,I.V.T.; Souza,N.C.D.S.; Andres,A.
This study aimed to evaluate different crops and plant species planted after soybeans for one year, in terms of their potential to inhibit the occurrence of weed species. The following crops that were planted as second crop after soybeans were evaluated: (1) corn (Zea mays) planted at spacing of 90 cm between rows, intercropped with Brachiaria ruziziensis in the inter-rows; (2) sunflower (Helianthus annuus); (3) crambe (Crambe abyssinica); (4) radish (Raphanus sativus); (5) rapeseed (Brassica napus); and (6) winter fallow - no plantation after soybeans. Phytosociological characterization of weed species was carried out at the pre-planting of soybeans in the following cropping season. Estimations of relative abundance, relative frequence, relative dominance...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corn; Sunflower; Radish; Crambe; Rapeseed; Phytosociology.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300007

Weeds occurrence and importance under distinct intercropping systems
Provedor de dados: 87
Autores: Concenço,G; Ceccon,G; Schwerz,F; Fonseca,I.C; Leite,L.F.
Intercropping systems involving corn are often subjected to stress caused by weeds, which usually result in 30-70 per cent yield loss when no control practice is applied. This study aimed to assess the composition of weed communities due to soil coverage, at neighboring areas submitted to distinct soil managements. The soil was collected at field and the study was conducted under a greenhouse in three steps: (1) weeds composition and importance within each treatment; (2) comparison between treatments (distinct crop and intercropping managements); (3) infestation in the area as a whole. The weed composition in the short term is influenced by the management of the area, but this shift requires some more years to be reflected at the soil seed bank. Some weed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil coverage; Soil management; Phytosociology.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582011000400011

Weed Phytosociological and Floristic Survey in Agricultural Areas of Southwestern Goiás Region
Provedor de dados: 87
Autores: W.F.,SANTOS; S.O.,PROCÓPIO; A.G.,SILVA; M.F.,FERNANDES; A.L.L.,BARROSO.
The use of the Roundup Ready(r) technology and the cultivation of a second crop influence the floristic composition of weed communities in Brazilian Central-West region cropping systems. This study has aimed to diagnose the dominant weed species in southwestern Goiás in areas of genetically-modified and conventional soybeans, using phytosociological and floristic surveys. Weed sampling was obtained by collecting all the plants present within a 0.5 m hollow frame, randomly thrown 20 times in each of thirty-five agricultural areas in the 2012/2013 harvest. Field survey was carried out in three periods: before desiccation for soybean sowing, before postemergence herbicide in soybean first application and before postemergence herbicide application in late...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytosociology; Floristic; Soybean; Late harvest; Importance value.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100065

Weed Seed Bank in an Agroforestry System With Eucalyptus in Subtropical Brazil
Provedor de dados: 87
Autores: DEISS,L.; MORAES,A.; PELISSARI,A.; PORFÍRIO-DA-SILVA,V.; SCHUSTER,M.Z.
ABSTRACT : Trees can modify the weed seed bank composition and distribution in the cropped area of an agroforestry system. This study aimed at analyzing the eucalyptus (Eucalyptus dunnii) effect on spatial distribution, functional traits abundance and weed seed bank botanic composition in an agroforestry system under no-tillage in Subtropical Brazil. The experiment was conducted in a randomized block design with five replications, and five positions between 4.5-year-old eucalyptus double rows [(4x3) x 20 m] as treatments. Soil sampling was performed at 0-20 cm and the method to quantify and identify seeds was the seedling emergence in trays, inside a greenhouse. Weed phytosociological indices (relative density, frequency and importance), functional traits...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alley cropping; Phytosociology; Integrated weed management; Integrated crop-livestock systems; Functional traits; Spatial distribution patterns.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100222

Interference of the Association Oxyfluorfen + Flumioxazin and the Addition of Mineral Oil on a Phytosociological Survey
Provedor de dados: 87
Autores: MENDES,K.F.; GOULART,M.O.; INOUE,M.H.; MERTENS,T.B.; SILVA,I.P.
ABSTRACT: Phytosociological studies are extremely important for the management of weeds in cultivated areas. Thus, the goal of this work was to evaluate the interference of mineral oil associated with oxyfluorfen and flumioxazin, through the phytosociological survey of weeds. Therefore, this experiment was conducted in a 2 x 5 + 1 factorial design and with four replications; the following oxyfluorfen + flumioxazin associations were evaluated: 240 + 50, 192 + 40, 144 + 30, 96 + 20 and 48 + 10 g a.i. ha-1, with and without the addition of mineral oil, including a control sample without application. Thirty days after the application, plant density, frequency and abundance of species were determined, and so were frequency, density and relative abundance, as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytosociology; Similarity index; Herbicide association; Adjuvants.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100230

WEED INCIDENCE AFTER SOYBEAN HARVEST IN NO-TILL AND CONVENTIONAL TILLAGE CROPROTATION SYSTEMS IN RORAIMA’S CERRADO
Provedor de dados: 87
Autores: ALBUQUERQUE,J.A.A.; SANTOS,T.S.; CASTRO,T.S.; MELO,V.F.; ROCHA,P.R.R.
ABSTRACT The goal of this study was to evaluate the occurrence of weeds after soybean harvest in rotational systems of no-till and conventional tillage in the savannah of Roraima, Brazil. Two simultaneous experiments were conducted in adjacent areas, the first one with no-till soil management system and the second one with the conventional system, with crop rotations for five agricultural years: pearlmillet (2007/2008), soybean (2008/2009), maize (2009/2010), cowpea with maize (2010/2011), soybean (2011/2012) and maize (2012/2013). The used experimental design was the randomized block one with 28 plots, sized 3 x 15 m (45 m2) distributed in 4 blocks. In May 2010, the combined sowing of cowpea and maize was performed, and later, during the same month of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Phytosociology; Weeds; Savannah; Morphological characteristics.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100238

Floristic and Phytosociology of Weeds in Upland Rice in the Humid Tropics
Provedor de dados: 87
Autores: SILVA,M.R.M.; COSTA,E.A.; CORRÊA,M.J.P.; RODRIGUES,A.A.C.; MESQUITA,M.L.R.
ABSTRACT: Knowledge of the floristic composition and vegetation structure are essential conditions for development of more efficient and economic weed management strategies in crops in the humid tropics. The objective of the research was to carry on floristic and phytosociological surveys to know the main weeds in upland rice fields in the humid tropics of the Brazilian State of Maranhão. Weed samples were done by means of an open metal rectangle of 0.15 m2 thrown at random in the vegetative and reproductive stages of rice crop in 2009/10 and 2010/2011 harvest. A total of 65 species from 23 families was identified 35 (53.85%) from the eudicotyledons botanical group, 29 (44.06%) from the monocotyledonous and one (1.53%) belonged to the pteridophytes. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Weed community; Phytosociology.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100282

Effect of long-term agricultural management systems on occurrence and composition of weed species
Provedor de dados: 87
Autores: Concenço,G; Salton,J.C; Secretti,M.L; Mendes,P.B; Brevilieri,R.C; Galon,L.
This study aims to assess the composition of weed communities as a function of distinct selection factors, at neighboring areas submitted to distinct soil management and diverse use for sixteen years. Four areas submitted to distinct managements (conventional tillage system; no-till system; integration crop/livestock and continuous livestock) were sampled in relation to the occurrence and severity of weed species by the beginning of the planting season, being estimated the relative abundance, relative frequency and relative dominance of each weed species under each area, as well as the Importance Value Index for each species. Areas were also compared by the Sørensen's similarity coefficient. Areas where pasture and grazing were never present, exhibited a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Integration crop/livestock; Cropping systems; Phytosociology.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582011000300005

Weeds occurrence in areas submitted to distinct winter crops
Provedor de dados: 87
Autores: Concenço,G.; Silva,C.J.; Staut,L.A.; Pontes,C.S.; Laurindo,L.C.A.S.; Souza,N.C.D.S.
In the Western Region of Brazil, it is usual to have two agricultural harvests in the same cropping season. Usually the first crop is soybean, followed by corn. In areas where corn is not planted due to a delayed harvest of soybean, farmers generally do not use winter crops. For these areas, the planting of winter oilseed crops aiming at the production of bio-fuels is one of the best alternatives; in addition, this would help in reducing the occurrence of weed species at the following summer crop. This study aimed to assessing the weed community in distinct winter crops post soybean crop, in terms of species composition, level of infestation and severity of occurrence. The following treatments were evaluated: agriculture under a no-till system with winter...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytosociology; Oilseed crops; Infestation; Crambe abyssinica; Brassica napus; Raphanus sativus.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000400008

Weed Phytosociological Survey in Irrigated Rice
Provedor de dados: 87
Autores: NUNES,F.S.; SCHAEDLER,C.E.; CHIAPINOTTO,D.M.
ABSTRACT: The phytosociological method helps evaluate the vegetation composition. The objective of this study was to identify and quantify the main weed species present in irrigated rice. The phytosociological survey was carried out in three mainly rice monoculture, Clearfield® technology using properties in Itaqui-RS, between 2013 and 2014. For each property and period, a ½ ha representative area was selected and 10 random samples were collected, using a quadrat square of 1 m2. The sample colletion was conducted in two periods of time: during the irrigated rice crop initial growth and during the cereal’s pre-harvesting phase. All collected plants were identified and counted, allowing for their frequency, relative frequency, density, relative density,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytosociology; Oryza sativa; Identification.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100245

EFFECT OF PLANTING DENSITIES OF “BRS PRINCESS” BANANA TREE IN THE SUPPRESSION OF WEEDS
Provedor de dados: 87
Autores: LANZA,T.R.; MACHADO,A.F.L.; MARTELLETO,L.A.P.
ABSTRACT The objective is to evaluate the effects of plant density in banana crops against weed suppression. Six treatments were used: 1,200 (3.33 x 2.5 m), 1,600 (2.5 x 2.5 m), 2,000 (2.0 x 2.5 m), 2,400 (1.67 x 2.5 m), 2,800 (1.43 x 2.5 m) and 3,200 (1.25 x 2.5 m) banana plants per hectare, arranged in an experimental design of randomized blocks with four replications. The phytosociological study of weed communities was carried out one month after transplanting and then every 90 days, totaling six samples in 16 months of cultivation, always those being held 15 days after mowing. With the data of dry mass and number of individuals per species Relative density (De.R) Relative frequency (Fr.R) Relative dominance (Do.R), importance value value (IVI) of weed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Banana crop; Phytosociology; Crop management.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100252

Characterization of the Weed Flora in Rice Areas under Distinct Cropping Systems and Herbicide Managements
Provedor de dados: 87
Autores: CONCENÇO,G.; ANDRES,A.; SCHREIBER,F.; SILVA,A.F.; MOISINHO,I.S.; CORADINI,M.C.
ABSTRACT: The aim of this study was to evaluate the occurrence of weeds in flooded rice areas, as a function of planting system and herbicide programmes in the previous cropping year. The experiment was installed in field conditions, in randomized complete blocks design, arranged in factorial scheme 3 x 2, with eight replications. In factor A, treatments consisted on conventional tillage, minimum tillage and no till cropping systems, coupled to the application (traditional control) or not (semi-ecological system) of herbicides (Factor B). One year after rice cultivation, preceding the planting of the next cropping season, phytosociological evaluations of the weed communities present in the treatments were carried out. We assessed the overall infestation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chemical control; Semi-ecological rice; Phytosociology; Southern Brazil.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100286

Infestation of weed species in monocrop coffee or intercropped with banana, under agroecological system
Provedor de dados: 87
Autores: Concenço,G.; Motta,I.S.; Correia,I.V.T.; Santos,S.A.; Mariani,A.; Marques,R.F.; Palharini,W.G.; Alves,M.E.S.
We aimed with this study to compare weed infestation in coffee under two different cropping managements: conventional coffee grown alone, or intercropped with banana plantation in a year-round basis (late spring, late summer, late fall and late winter). The experiment was installed in 2009 under field conditions at the Escola Municipal Rural Benedita Figueiró de Oliveira, in the city of Ivinhema in the state of Mato Grosso do Sul, Brazil. Assessments of weed occurrence were made three years after employment, on both cropping systems, and density, frequency, dominance and the importance value for each plant species in each system and season were quantified. Plant diversity within each system was estimated by Simpson and Shannon-Weiner indexes. Similarity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Weed occurrence; Intercrops; Phytosociology.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400001

Floristic and structural variation of weeds in eucalyptus plantations as influenced by relief and time of year
Provedor de dados: 87
Autores: Tuffi Santos,L.D.; Cardoso Filho,O.; Santos Júnior,A.; Sant'Anna-Santos,B.F.; Felix,R.C.; Leite,F.P.
The objective of this work was to analyze the floristic variation and phytosociological structure of weeds as influenced by relief and time of year in eucalyptus plantations in Santana do Paraíso and Guanhães - MG. The total area sampled for each locality was approximately 10 ± 3 hectares, comprising three types of relief: lowland, slope, and upper area. In each type of relief, 10 plots of 1 m² were sampled, corresponding to 30 plots per locality, where they were randomly allocated in a zigzag. The taxonomic identification was performed in four assessments, corresponding to the months of November and March, comprising two ratings each season, always at the same points, and geo-referenced using the Global Positioning System (GPS). A total of 3,893...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eucalyptus; Dynamics; Phytosociology; Ecological adaptation.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300001

Weed Community in a Raw Sugarcane Renovation Area Submitted to Different Soil Managements
Provedor de dados: 87
Autores: SOARES,M.B.B.; BIANCO,S.; FINOTO,E.L.; BOLONHEZI,D.; ALBUQUERQUE,J.A.A.; SILVA,A.A.
The objective of this study was to evaluate the weed community in a raw sugarcane renovation area with three soil managements and peanut sowing in succession. The experiment was conducted during the 2007/08 season on a raw sugarcane area harvested without prior burning in the last five cuts. A randomized block design with treatments arranged in a split plot and arranged in four replications was used. The main treatments consisted of three cropping systems: conventional tillage, minimum tillage and direct planting, and subplots consisted in the absence (resting) or presence of crop rotation with peanuts. After 135 days from planting peanuts and 180 days of sugarcane harvest, the number of weeds m-2 was counted and the shoot dry biomass of the weeds...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arachis hypogaea Saccharum spp. direct planting minimum tillage fallow; Phytosociology.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100091

Weed Diversity in Corn with Different Plant Arrangement Patterns Grown Alone and Intercropped with Palisade Grass
Provedor de dados: 87
Autores: MELO,T.S.; MAKINO,P.A.; CECCON,G.
ABSTRACT: Composition and level of weed infestation interfere with crop yield and increase production costs. This study aimed to identify weed composition and infestation in corn grown with different plant populations, single, and intercropped with palisade grass. The phytosociological method was used to evaluate density, frequency, dominance, and infestation level of weeds in single and intercropped corn, a with conventional (0.90 m) and reduced (0.45 m) spacing, and low and high plant population in Dourados, MS, Brazil. Commelina benghalensis, Echinochloaspp., and Euphorbia heterophylla were the species most found in the treatments. Single corn with higher plant population decreased weed occurrence. Treatments with palisade grass under a reduced spacing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Urochloa; Plant population; Phytosociology; Diversity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100199

PHYTOSOCIOLOGICAL SURVEY OF WEED PLANTS IN INTERCROPS OF COMMON BEANS AND CASTOR BEANS
Provedor de dados: 87
Autores: SANTOS,F.L.S.; TEIXEIRA,I.R.; TIMOSSI,P.C.; SILVÉRIO,J.G.D.; BENETT,C.G.S.
ABSTRACT The aim of this paper was to conduct the phytosociological survey of weeds in cultivated areas with common beans and castor beans in the municipality of Ipameri, in the Southeast region of the State of Goiás, considering intercropping and monoculture. The survey was conducted 20 days after emergence of the crop using the square inventory method. We evaluated the green and dry biomass of weeds, their leaf area, frequencies, density and absolute and relative dominance, relative importance and similarity index, expressed as a percentage. Sixteen weed species were identified, distributed into 10 botanical families. The most important weed species in the Southeast region of Goiás for the cultivation of common beans and castor beans were: Cenchrus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris; Ricinus communis; Intercropping; Phytosociology.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100236

Seed bank from soil of coffee plantations associated with grevillea trees
Provedor de dados: 87
Autores: Santos,M.A.F.; Matsmoto,S.N.; Cesár,F.R.C.F.; Bonfim,J.A.; Araujo,G.S.; Viana,A.E.S.
This study aimed to study the composition and dynamics of seed bank from soil of coffee plantations associated with grevilea trees in the experimental fields of the Southwest Bahia State University, on Vitória da Conquista campus. The experiments were carried out from September 2006 to May 2007. The coffee trees (Coffea arabica) were sown at three x one m spacing, associated with grevillea trees (Grevillea robusta) and maintained at densities of 277, 139, 123, 69, 62 and 31 plants ha-1, under direct sunlight. One hundred grams of soil were taken from each treatment with four repetitions and later identified and counted with a 10x magnifying glass. To determine seedling emergence, four soil samples of 1000 g were collected from each experimental field and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffea arabica; Grevillea robusta; Phytosociology.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582008000400003

Weed Occurrence in Sugarcane as Function of Variety and Ground Straw Management1
Provedor de dados: 87
Autores: CONCENÇO,G.; LEME FILHO,J.R.A.; SILVA,C.J.; MARQUES,R.F.; SILVA,L.B.X.; CORREIA,I.V.T.
ABSTRACT This study aims to verify the effect of crop varietal architecture and straw removal from planting rows in the occurrence of weeds in sugarcane and infer about the sustainability of the production system with no herbicide application. The experiment was established in 2011 in a randomized block design with split plots and four replications. Main plots were varieties IACSP95 5000 and SP91 1049. In the sub-plots there the straw removal was allocated (evenly scattered in the area, or concentrated in inter-rows). Assessments were conducted in 2012 and 2013 and the absolute levels of infestation, density, frequency and dominance of weed species were obtained. Areas were intra-characterized by the coefficients of Simpson and Shannon-Weiner and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp.; Phytosociology; Sustainability.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000200219

Occurrence of weed species in Jatropha curcas intercropping systems
Provedor de dados: 87
Autores: Concenço,G.; Silva,C.J.; Correia,I.V.T.; Silva,J.A.N.; Santos,S.A.; Fróes,A.L.; Fábris,D.N.; Staut,L.A.
This study aimed to evaluate the level of infestation by weed species in a consolidated Jatropha plantation, as a function of the plant species grown in interrows. The experiment was installed in 2006 at the district of Itahum, city of Dourados, state of Mato Grosso do Sul, Brazil, made possible through a partnership between Embrapa Western Agriculture and Paraiso Farm. Treatments consisted of (1) Jatropha in monocrop, with no plant at the interrrows; or the following plants cultivaded at the interrows of Jatropha: (2) Stylosanthes spp.; (3) Brachiaria ruziziensis; (4) Brachiaria ruziziensis + Stylosanthess pp.; (5) Brachiaria humidicola; (6) Panicum maximum cv. massai; (7) Cajanus cajan cv. anão; (8) Crotalaria spectabilis; (9) Crop rotation system 1 -...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jatropha crop; Infestation; Phytosociology.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000200010

Horizontal and vertical tree community structure in a lowland atlantic rain forest, southeastern Brazil
Provedor de dados: 88
Autores: Guilherme,Frederico Augusto G.; Morellato,L. Patrícia C.; Assis,Marco A.
The horizontal and vertical tree community structure in a lowland Atlantic Rain Forest was investigated through a phytosociological survey in two 0.99 ha plots in the Intervales State Park, São Paulo State. All trees &gt; 5 cm diameter at breast height were recorded. 3,078 individuals belonging to 172 species were identified and recorded. The Shannon diversity index was H' = 3.85 nat.ind.-1. The Myrtaceae family showed the greatest floristic richness (38 species) and the highest density (745 individuals) in the stand. Euterpe edulis Mart. had the highest importance value (33.98%) accounting for 21.8% of all individuals recorded. The quantitative similarity index was higher than the qualitative index, showing little structural variation between plots....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diversity; Multivariate analysis; Phytosociology; Tree stratification; Tropical forest.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042004000400012

Spatial variation in the structure and floristic composition of "restinga" vegetation in southeastern Brazil
Provedor de dados: 88
Autores: Pimentel,Marina C.P.; Barros,Marx J.; Cirne,Paulo; Mattos,Eduardo A. de; Oliveira,Rodrigo C.; Pereira,Miriam C.A.; Scarano,Fabio R.; Zaluar,Henrique L.T.; Araujo,Dorothy S.D.
We examined large-scale spatial variation of structural parameters and floristic composition in open Clusia scrub, a vegetation type of the Brazilian "restingas" (sandy coastal plain vegetation). This vegetation is organized in islands separated by sandy stretches with sparse herbaceous vegetation. We located 12 sample areas on three consecutive beach ridges, lying parallel to the coastline and at different distances from the ocean, in close proximity to two lagoons (Cabiúnas and Comprida). Each sample area was divided into three strips. We used the line intercept method to sample all woody plants ³ 50 cm tall. We used nested ANOVA to verify structural variation between different sampling scales. TWINSPAN analysis was performed to examine the variation in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytosociology; Plant community; Sampling scale; Sandy coastal plain.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000300018

Inter-annual variations in the floristic and population structure of an herbaceous community of "caatinga" vegetation in Pernambuco, Brazil
Provedor de dados: 88
Autores: Reis,Ana Maria S.; Araújo,Elcida L.; Ferraz,Elba Maria N.; Moura,Ariadne N.
The influence of climatic variations on the herbaceous component of the "caatinga" vegetation was examined in the state of Pernambuco, Brazil. A total of 105 1 × 1 m-plots were established, of which 35 were in a level micro-habitat, 35 in a riparian micro-habitat, and 35 in a stony microhabitat. During two consecutive years all herbaceous plants in these plots were counted, measured (height and diameter), and collected for identification. The Shannon-Wiener diversity index and the equitability were calculated for each year, as well as the density, frequency, dominance, total basal area and importance index for each species. The total annual pluviometric was 819.5 and 448.8 mm in 2002 and 2003, respectively. The herbaceous flora in the study area was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caatinga; Herbaceous component; Phytosociology; Seasonal climate changes; Species richness.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042006000300017

O mosaico vegetacional numa área de floresta contínua da planície litorânea, Parque Estadual da Campina do Encantado, Pariquera-Açu, SP
Provedor de dados: 88
Autores: SZTUTMAN,MARCIO; RODRIGUES,RICARDO R.
Este trabalho teve como objetivo caracterizar a florística, estrutura e fisionomia de três florestas em distintas situações fisiográficas da planície litorânea. Foram amostradas uma floresta sobre turfeira pouco profunda (floresta turfosa rasa), uma floresta sobre turfeira profunda (floresta turfosa profunda) e uma floresta em solo firme e seco (floresta sobre morrote), todas situadas na área de floresta contínua do Parque Estadual da Campina do Encantado, Pariquera-Açu SP. Foi realizado o levantamento fitossociológico através de blocos de parcelas contíguas de 10 × 10 m -- totalizando 1,04 ha -- e amostradas todas as árvores com DAP  &gt; ou =  4,8 cm. Foram encontradas ao todo 144 espécies, sendo 112 na floresta sobre morrote, 46 na floresta turfosa rasa...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic Rain Forest; Tropical peat forest; Vegetational mosaic; Phytosociology; Coastal plains.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000200005

Perfil florístico e estrutura da comunidade arbórea de uma floresta de vale no Parque Nacional da Chapada dos Guimarães, Mato Grosso, Brasil
Provedor de dados: 88
Autores: PINTO,JOSÉ ROBERTO RODRIGUES; OLIVEIRA-FILHO,ARY TEIXEIRA DE.
O propósito do presente trabalho foi descrever a composição florística e a estrutura da comunidade arbórea da floresta de vale da queda d'água Véu de Noiva, Parque Nacional da Chapada dos Guimarães, Mato Grosso, Brasil. A análise florística e fitossociológica procurou avaliar, respectivamente: (a) a influência das principais províncias fitogeográficas brasileiras na composicão florística desta floresta de vale e (b) o papel das espécies mais importantes da comunidade arbórea em termos de sua abundância, grupo ecológico e porte dos indivíduos adultos. Foram amostrados todos os indivíduos arbóreos com circunferência do caule à altura do peito (CAP) &lt;FONT FACE="Symbol"&gt;³&lt;/FONT&gt; 15 cm contidos em 36 parcelas de 30 x10 m. Foram registradas 172...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Floristic composition; Phytosociology; Valley forest; Mato Grosso; Brazil.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000100008

Estudo florístico e fitossociológico de um fragmento florestal urbano: Bosque dos Alemães, Campinas, SP
Provedor de dados: 88
Autores: CIELO FILHO,ROQUE; SANTIN,DIONETE A.
O Bosque dos Alemães situa-se no Bairro Guanabara, em Campinas, SP (22º53' S e 47º04' W, altitude 685 m) e é formado por 2 ha de floresta estacional semidecidual. Foi realizado o censo das espécies arbóreas com PAP  &gt; ou =  15 cm, em que foram plaqueados 1.937 indivíduos, 1.851 vivos e 86 mortos em pé. Foram identificadas 105 espécies, distribuídas em 43 famílias e 67 gêneros; 80 espécies são nativas e 25 introduzidas. O índice de diversidade de Shannon foi estimado em 3,45 nat.ind.¹. As famílias com maior riqueza foram Leguminosae, Myrtaceae, Moraceae, Rutaceae, Euphorbiaceae e Bignoniaceae. As espécies com maior IVC foram Cryptocarya aschersoniana Mez, Piptadenia gonoacantha (Mart.) Macbr. e Eucalyptus tereticornis Smith. A soma do IVC das espécies...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Urban forest; Floristic; Phytosociology; Management; Conservation.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000300005

Fitossociologia de um remanescente de mata mesófila semidecídua urbana, bosque John Kennedy, Araguari, MG, Brasil
Provedor de dados: 88
Autores: Araújo,Glein Monteiro; Guimarães,Antônio José Maia; Nakajima,Jimi Naoki.
RESUMO - (Fitossociologia de um remanescente de mata mesófila semidecídua urbana, Bosque John Kennedy, Araguari, MG, Brasil). Um estudo fitossociológico foi realizado no Bosque Municipal John Kennedy, município de Araguari, MG (48°11'19''W e 18°38'35''S). O bosque, com aproximadamente 11,2 ha, situa-se no perímetro urbano e é formado principalmente por uma mata mesófila semidecídua. No levantamento fitossociológico realizado, amostraram-se, em 1,2 ha, 1827 indivíduos, pertencentes a 46 famílias; 88 gêneros e 113 espécies, com um índice de diversidade de Shannon de H' = 3,75 nats/indivíduo. Os parâmetros fitossociológicos indicam as espécies mais importantes: Licania apetala, Micrandra elata, Copaifera langsdorffii, Astronium nelson-rosae e Alchornea...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Urban semideciduous mesophytic forest; Phytosociology; Gaps.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041997000100007

Fitossociologia de um remanescente de floresta higrófila (mata de brejo) em Campinas, SP
Provedor de dados: 88
Autores: TONIATO,MARIA TERESA ZUGLIANI; LEITÃO FILHO,HERMÓGENES DE FREITAS; RODRIGUES,RICARDO RIBEIRO.
Foi realizado um levantamento fitossociológico em dois fragmentos de floresta higrófila (mata de brejo) no município de Campinas, SP. Em cada fragmento foram alocadas 10 parcelas contíguas de 10 m x 10 m e amostrados todos os indivíduos com PAP (perímetro à altura do peito) &lt;FONT FACE="Symbol"&gt;³&lt;/FONT&gt; 10 cm. Os dados dos dois fragmentos foram agrupados e analisados em conjunto. Ao todo foram amostrados 955 indivíduos de 55 espécies, 44 gêneros e 29 famílias. Foi observada baixa diversidade em espécies (H’ = 2,80 nats/indivíduo). As espécies de maior IVI, em ordem decrescente, foram Calophyllum brasiliensis (Clusiaceae), Protium almecega (Burseraceae), Styrax pohlii (Styracaceae), Syagrus romanzoffiana (Arecaceae), Talauma ovata (Magnoliaceae),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Swamp forest; Forest fragments; Floristics; Phytosociology; Campinas/SP/BR.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041998000200012

Phytosociology of the remaining xerophytic woodland associated to an environmental gradient at the banks of the São Francisco river - Petrolina, Pernambuco, Brazil
Provedor de dados: 88
Autores: Nascimento,Clóvis E.S.; Rodal,Maria J.N.; Cavalcanti,Antônio C.
Floristic and phytosociological surveys were carried out for 12 months in the Embrapa-SPSB, Petrolina, Pernambuco, Brazil. A transect was laid on starting at the river bank extending for 790 m away from the river and divided into 140 10 × 10 m contiguous plots. In each plot, all standing plants, alive or dead, with stem diameter at soil level &gt; 3 cm and total height &gt; 1 m were sampled. Along this transect, an elevation range of 9.40 m was registered and five topographical environments were identified: riverside (MR), dike (D), floodable depression (DI), boundary terrace (TL) - all of them belonging to the fluvial terrace with Fluvic Neosol and Haplic Cambisol both silty textured eutrophic soils - and the inlander tableland (TS), with medium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytosociology; São Francisco river; Semi arid; Soil; Woody vegetation.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042003000300001

Estrutura e diversidade do componente arbóreo da floresta na Estação Ecológica dos Caetetus, Gália, SP
Provedor de dados: 88
Autores: DURIGAN,GISELDA; FRANCO,GERALDO ANTÔNIO DAHER CORRÊA; SAITO,MASAHIRO; BAITELLO,JOÃO BATISTA.
O estudo fitossociológico, se realizado em diferentes estratos verticais da floresta, fornece dados de grande valia para a compreensão da dinâmica da comunidade. Efetuou-se levantamento das espécies arbóreas presentes em diferentes estratos, em área de 6.000 m² de floresta madura, na Estação Ecológica dos Caetetus, Gália, SP. Foram utilizadas 60 parcelas de 10 x 10 m, para indivíduos com diâmetro do caule a 1,30 m acima do nível do solo (DAP) a partir de 5 cm (estrato superior); 10 x 2 m, para indivíduos com DAP entre 1 e 5 cm (estrato intermediário) e 60 sub-parcelas de 2 x 2 m, para indivíduos menores que 1 cm de DAP (estrato inferior). Verificou-se que a diversidade, a composição florística e a densidade relativa das espécies variam entre estratos. No...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seasonal semideciduous forest; Phytosociology; Stratification.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000400003

Aspectos ecológicos de um trecho de floresta de brejo em Itatinga, SP: florística, fitossociologia e seletividade de espécies
Provedor de dados: 88
Autores: Ivanauskas,Natália Macedo; Rodrigues,Ricardo Ribeiro; Nave,André Gustavo.
(Aspectos ecológicos de um trecho de floresta de brejo em Itatinga, SP: florística, fitossociologia e seletividade de espécies). No presente trabalho estudou-se um trecho de floresta de brejo localizada na fazenda Santa Irene, de propriedade da EUCATEX Ltda., no município de Itatinga-SP (48º38'52,2"W e 23º17'41,6"S), com uma área de 2 ha. O levantamento fitossociológico foi realizado através do método de censo de 1 ha do remanescente florestal, onde foram amostrados todos os indivíduos com PAP (perímetro à altura do peito) &gt; a 15 cm. Foram amostrados 1310 indivíduos, pertencentes a 28 famílias, 34 gêneros e 39 espécies do estrato arbustivo-arbóreo. As famílias que apresentaram os maiores valores de IVC foram Clusiaceae (53,49), Burseraceae (41,30),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytosociology; Swamp forest; Ciliar forest; Itatinga.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041997000200005

Composição florística e fitossociologia do componente arbóreo das florestas ciliares do rio Iapó, na bacia do rio Tibagi, Tibagi, PR
Provedor de dados: 88
Autores: DIAS,MARILDA CARVALHO; VIEIRA,ANA ODETE SANTOS; NAKAJIMA,JIMI NAOKI; PIMENTA,JOSÉ ANTONIO; LOBO,PATRÍCIA CARNEIRO.
Foram realizados estudos da composição florística e fitossociologia de 1 ha de floresta ciliar do rio Iapó (bacia do rio Tibagi), município de Tibagi, PR (24º31’S e 50º25’W) utilizando-se 100 parcelas contíguas de 10 x 10 m, tendo-se como critério de inclusão um diâmetro à altura do peito (DAP) mínimo de 5 cm. Para cada espécie amostrada foram estimados parâmetros relativos à freqüência, densidade e dominância, além do índice do valor de importância (IVI) e índice do valor de cobertura (IVC). O levantamento resultou em 1594 indivíduos pertencentes a 127 espécies, 81 gêneros e 43 famílias. As espécies mais importantes em IVI e IVC foram Eugenia blastantha, Faramea porophylla, Casearia obliqua, Nectandra grandiflora, Sebastiania commersoniana, Casearia...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytosociology; Riparian forest; Tibagi river basin; Southern Brazil.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041998000200011

Florística e fitossociologia de remanescentes de floresta estacional decidual em Piracicaba, São Paulo, Brasil
Provedor de dados: 88
Autores: IVANAUSKAS,NATÁLIA MACEDO; RODRIGUES,RICARDO RIBEIRO.
O estudo foi realizado em dois remanescentes de floresta estacional decidual de 4 e 10 ha, em Piracicaba, São Paulo, Brasil. Esta floresta tem características abióticas próprias, como solo litólico, estresse hídrico no período seco e excesso de água no período úmido, definindo uma flora particular e fisionomia semelhante a de florestas secas. O levantamento florístico foi realizado nos dois remanescentes e o fitossociológico naquele de 10 ha, onde foram amostrados os indivíduos com perímetro à altura do peito (PAP)  &gt; ou =  15 cm existentes em 43 parcelas de 10 x 10 m. Foram registradas 110 espécies, 86 gêneros e 42 famílias. Do total de espécies, 20,7% continham espinhos, 31,0% dos 894 indivíduos amostrados apresentaram-se perfilhados e, no estrato...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Deciduous seasonal forest; Dry forest; Floristic; Phytosociology.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000300005

Composição, estrutura e relações florísticas do componente arbóreo de uma floresta estacional no Rio Grande do Sul, Brasil
Provedor de dados: 88
Autores: JARENKOW,JOÃO ANDRÉ; WAECHTER,JORGE LUIZ.
A composição específica de florestas estacionais no Rio Grande do Sul é fortemente influenciada por dois contingentes florísticos diferentes, um coincidente com as florestas atlânticas do leste e outro com as florestas paranaense-uruguaias do oeste. Um levantamento fitossociológico de uma floresta central sul-rio-grandense foi realizado para detectar a estrutura comunitária do componente arbóreo e a participação local dos diferentes contingentes florísticos. Todas as árvores com DAP  &gt; ou =  5 cm foram registradas em uma área de 1 ha, subdividida em 100 unidades amostrais de 10 x 10 m. As espécies amostradas foram classificadas como amplas ou restritas, segundo suas distribuições geográficas, considerando as afinidades florísticas leste ou oeste. A...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Floristics; Seasonal forest; Phytosociology; Phytogeography; Southern Brazil.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000300004

Interference of a weed community in the soybean crop in functions of sowing spacing
Provedor de dados: 124
Autores: Vitorino,Hermeson dos Santos; Silva Junior,Antonio Carlos da; Gonçalves,Clebson Gomes; Martins,Dagoberto.
ABSTRACT The use of double row spacing on soybean crop is recent and consists of a new soybean production technology in Brazil and worldwide, so weed interference may be different in relation to single crop row. Thus, the objective of this work was to evaluate the weed interference in soybean crop in function of sowing spacing. The experimental design was randomized blocks and treatments were arranged in a factorial (2x16): two spacings, a double row spacing [(0.20 x 0.20 m) x 0.67 m] and a conventional single row spacing (0.45 x 0.45 m) and sixteen periods of weed management, being eight control periods in which soybean was kept free of weeds by increasing periods of 7; 14; 21; 28; 35; 42; 49 and 145 days after emergence and eight coexistence periods,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Critical Periods; Phytosociology; Glycine max; Weed Competition.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000400605

Ecological, phytosanitary, and agronomic aspects of target weeds for biological control studies in Antioquia, Colombia
Provedor de dados: 109
Autores: Mira Taborda,Yerly Dayana; Castañeda Sánchez,Darío Antonio; Morales Osorio,Juan Gonzalo; Patiño Hoyos,Luis Fernando.
ABSTRACT Biological control as part of integrated weed management represents an emerging and promising method to minimize the use and impact of herbicides on the environment. The objective of this research was to determine the ecological, phytosanitary, and agronomic status of weeds associated with crops in Antioquia, Colombia, and their potential to be chosen as candidates for biological control studies using pathogenic fungi. The research was carried out through a sampling of weeds in 35 agricultural farms, distributed in 11 municipalities and 10 different crops, on which population ecological variables such as frequency and dominance were evaluated; phytosanitary variables such as incidence and severity of foliar fungal symptoms; as well as some...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biocontrol; Phytosociology; Weed ecology; Weed biology; Weed management.
Ano: 2022
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122022000200195

COMPARACION FLORISTICA DE DOCE PARCELAS EN BOSQUE DE TIERRA FIRME EN LA AMAZONIA PERUANA
Provedor de dados: 36
Autores: RUOKOLAINEN,Kalle; TUOMISTO,Hanna; RÍOS,Richer; TORRES,Alberto; GARCÍA,Mildred.
Floristic composition of twelve plots, 25 m by 25 m, was studied in the Peruvian Amazonia in order to investigate if it were possible to use a part of the flora as an indicator of the changes observed in other components of the flora. Floristic similarities among the plots were calculated using six different taxonomic or physiognomic groups: ferns, the families Melastomataceae and Myristicaceae, trees thicker than 2.5 cm diameter at breast hight (DBH), trees between 2.5 cm and 5 cm DBH, and trees thicker than 5 cm DBH. The similarities were used for agglomerati ve classifications of the plots and for analyzing the correlations among the different groups of plants with Mantel's test. The results indicate that floristic changes were similar in all of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazonia; Ferns; Mantel's test; Melastomataceae; Myristicaceae; Phytosociology.
Ano: 1994
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671994000200031

Floristic diversity of the soil weed seed bank in a rice-growing area of Brazil: in situ and ex situ evaluation
Provedor de dados: 39
Autores: Mesquita,Mário Luiz Ribeiro; Andrade,Leonaldo Alves de; Pereira,Walter Esfrain.
The objective of this study was to compare the ex situ and in situ floristic diversity of the soil weed seed bank of a rice field in northeastern Brazil. In a rice field in the county of Bacabal, located in the state of Maranhão, thirty 25-m² plots were laid out. From 15 plots, soil samples (6/plot; n = 90) were taken with a soil probe (25 × 16 × 3 cm) and placed in aluminum trays in the greenhouse. From the remaining 15 plots, weed samples (6/plot; n = 90) were taken with the same soil probe. The number of seeds was estimated by germination. We evaluated the numbers of species and individuals, as well as the density, frequency, abundance and importance value (IV) for each species. Diversity was computed by the Shannon index (H'). We recorded 13,892...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyperaceae; Competition; Biological invasion; Phytosociology; Smallholder farmers.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000300001

Availability and use of woody plants in a agrarian reform settlement in the cerrado of the state of Goiás, Brazil
Provedor de dados: 39
Autores: Tunholi,Vanessa Pessanha; Ramos,Marcelo Alves; Scariot,Aldicir.
Protected areas are important sources providing plant resources for human populations, and contributing to the livelihood and income of families. To test the ecological apparency hypothesis, that there is positive relationship between the visibility of a species and its use, we conducted an ethnobotanical survey in the protected area of the Itaúna rural settlement in the municipality of Planaltina, in the state of Goiás, in central Brazil. The phytosociological parameters were obtained in 5.6 ha area of the Brazilian cerrado (savanna), and the ethnobotanical survey conducted with semi-structured interviews with 75 people. There was a weak positive correlation between the use value and the phytosociological parameters. A principal component analysis showed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; Ecological apparency; Use value; Ethnobotany; Phytosociology.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000300018

Influence of edaphic factors on the floristic composition of an area of cerradão in the Brazilian central-west
Provedor de dados: 39
Autores: Bueno,Marcelo Leandro; Neves,Danilo Rafael Mesquita; Souza,Anderson Fernandes; Oliveira Junior,Elio; Damasceno Junior,Geraldo Alves; Pontara,Vanessa; Laura,Valdemir Antônio; Ratter,James Alexander.
This study describes the influence of edaphic factors on the floristic composition of an area of cerradão (woodland savanna) in the city of Campo Grande, located in the Brazilian central-west. In 10 plots (5 × 20 m each), we evaluated all trees with a diameter at breast height &gt; 4.77 cm. Soil samples were analyzed for each plot in order to determine edaphic variables correlated with species composition. We sampled 1180 individuals of 61 species. The evenness index was 0.74, which indicates uneven distribution of species, which was explained by a high abundance of Qualea parviflora, Curatella americana, Qualea grandiflora, Terminalia argentea and Astronium fraxinifolium. We registered more trees in the smallest diameter class and in the middle layer of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; Dystrophic cerradão; Mesotrophic cerradão; Phytosociology; Soil-plant interaction.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000200017

Structure of the understory community in four stretches of Araucaria forest in the state of São Paulo, Brazil
Provedor de dados: 39
Autores: Polisel,Rodrigo Trassi; Ivanauskas,Natália Macedo; Assis,Marta Camargo de; Shepherd,George John; Yamamoto,Kikyo.
We analyzed the structure of the understory community in the Atlantic Forest sensu lato, for which phytosociological descriptions of the understory are lacking. We delineated 50 plots of 10 × 20 m each at four sites within an Araucaria forest (a subtype of Atlantic Forest), located in the municipalities of Bananal, Campos do Jordão, Itaberá and Barra do Chapéu, all of which are in the state of São Paulo, Brazil. To sample the resident species of the understory, we randomly selected five 1 × 1 m subplots within each plot, resulting in a total sampling area of 250 m² at each site. We identified differences among the locations, mostly due to proportional differences in growth forms, in terms of species richness and the importance values within the community....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herb-shrub layer; Phytosociology; Species richness; Mixed rain forest; Atlantic Forest.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000100009

Woody medicinal plants of the caatinga in the state of Pernambuco (Northeast Brazil)
Provedor de dados: 39
Autores: Silva,Ana Carolina Oliveira da; Albuquerque,Ulysses Paulino de.
Floristic and phytosociological studies undertaken in six areas of the state of Pernambuco were selected with the aim of analyzing the Relative Importance of the woody medicinal plant species of Pernambuco's caatinga from an ethnobotanical perspective. For the data analysis, only those identified up to the species level were selected and information on medicinal properties was obtained for each one from the literature. The Relative Importance was calculated for each species. From the 57 woody species, 22 had therapeutic indications; from these, Anacardium occidentale L., Tabebuia impetiginosa (Mart. ex DC) Standley, Schinopsis brasiliensis Engl., and Myracrodruon urundeuva (Engl.) Fr. All. had the greatest values of Relative Importance. The correlation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tropical dry forests; Medicinal plants; Ethnobotany; Floristic; Phytosociology.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062005000100003

Mixed rain forest in southeastern Brazil: tree species regeneration and floristic relationships in a remaining stretch of forest near the city of Itaberá, Brazil
Provedor de dados: 39
Autores: Ribeiro,Tiago Maciel; Ivanauskas,Natália Macedo; Martins,Sebastião Venâncio; Polisel,Rodrigo Trassi; Santos,Rochelle Lima Ramos dos; Miranda Neto,Aurino.
The aim of this work was to evaluate the floristic composition, richness, and diversity of the upper and lower strata of a stretch of mixed rain forest near the city of Itaberá, in southeastern Brazil. We also investigated the differences between this conservation area and other stretches of mixed rain forest in southern and southeastern Brazil, as well as other nearby forest formations, in terms of their floristic relationships. For our survey of the upper stratum (diameter at breast height [DBH] &amp;gt; 15 cm), we established 50 permanent plots of 10 × 20 m. Within each of those plots, we designated five, randomly located, 1 × 1 m subplots, in order to survey the lower stratum (total height &amp;gt; 30 cm and DBH &lt; 15 cm). In the upper stratum, we...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Araucaria angustifolia; Cluster analysis; Ecotone; Phytogeography; Phytosociology.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100010

Together yet separate: variation in soil chemistry determines differences in the arboreal-shrub structure of two contiguous rupestrian environments
Provedor de dados: 39
Autores: Almeida,Hernani Alves; Bahia,Thaíse de Oliveira; Gélvez-Zúñiga,Irene; Fernandes,Geraldo Wilson.
ABSTRACT Rupestrian landscapes are characterized by vegetation mosaics comprised of different plant communities and strongly linked to environmental filters. These environments are nutrient-impoverished, and possess water retention deficits and high solar exposure. This study aimed to determine whether chemical properties of the soil shape the arboreal-shrub vegetation structure in two neighboring habitats; a rupestrian cerrado and a rupestrian grassland. We hypothesized that the habitat with higher soil chemical properties would have higher parameters for vegetation structure, and different species composition. We expected higher chemical properties of the soil to favor a greater variety of plant life-forms. A total of 1349 individuals of 85 species...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arboreal-shrub; Asteraceae; Campo rupestre; Cerrado; Edaphic characteristics; Environmental filters; Myrtaceae; Phytosociology.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400578

Structure and phytogeographic relationships of swamp forests of Southeast Brazil
Provedor de dados: 39
Autores: Kurtz,Bruno Coutinho; Gomes,Jorge Caruzo; Scarano,Fabio Rubio.
Swamp forests are associated with soils that are saturated or inundated because of a high water table. In Brazil, little is known about the plant ecology of such forests. In this paper, we aimed to describe the phytosociological structure of the tree layer of swamp forests in Restinga de Jurubatiba National Park, in the northern part of the state of Rio de Janeiro, and to evaluate the floristic similarities between these forests and some other possibly related types of vegetation formations in Brazil. The sampling included 84 species, within 62 genera and 34 families. The Shannon diversity index was 3.42, and the Shannon evenness index was 0.77. The forests studied showed an oligarchic structure; Tapirira guianensis, Calophyllum brasiliense and Protium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic Forest biome; Jaccard similarity coefficient; Phytogeography; Phytosociology; Coastal sand plain.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400002

Fitossociologia da mata do Morro da Quixaba no território de Fernando de Noronha
Provedor de dados: 39
Autores: Silva Júnior,Manoel Cláudio da; Felfili,Jeanine Maria; Proença,Carolyn Elinore Barnes; Brasileiro,Ana Cristina Miranda; Melo Filho,Benício de; Silva,Paulo Ernane Nogueira da; Costa,Kátia Lemos.
O território de Fernando de Noronha localiza-se a 32º 25'30" W de longitude e 3º 50' 10" S de latitude e é composto por 21 ilhas. Este trabalho foi realizado na ilha principal na região do Morro da Quixaba até a Ponta da Sapata, onde a vegetação foi menos perturbada nas últimas décadas. Utilizou-se o método de quadrantes para a amostragem de indivíduos com diâmetro mínimo de 5 cm a 30 cm do solo. A distância entre os pontos foi estabelecida em 10 m. No total foram aplicados 100 pontos de amostragem, em diversas picadas alocadas na área de estudo. Foram encontradas 13 famílias sendo dominantes, Nyctaginaceae, Bignoniaceae, Anacardiaceae, Rubiaceae e Euphorbiaceae. Dentre as 16 espécies encontradas, Guapira sp. ocupou a primeira posição em importância com...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytosociology; Floristics; Fernando de Noronha.
Ano: 1987
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061987000300024

Floristic composition and structure of an upper montane cloud forest in the Serra da Mantiqueira Mountain Range of Brazil
Provedor de dados: 39
Autores: Pompeu,Patrícia Vieira; Fontes,Marco Aurélio Leite; Santos,Rubens Manoel dos; Garcia,Paulo Oswaldo; Batista,Talita Alves; Carvalho,Warley Augusto Caldas; Oliveira Filho,Ary Teixeira de.
We analyzed the community structure of an upper montane cloud forest (elevation, 1900 m) in the Serra da Mantiqueira Mountain Range, in the state of Minas Gerais, Brazil. Our objective was to determine the comparative tree species richness and floristic diversity within this forest, which is at one of the higher elevations in the range, in relation to surrounding forests that are at lower elevations, adjusting for elevational gradients. Within 15 permanent plots (40 × 10 m each), we tagged all tree individuals with a diameter at breast height &gt; 5 cm, registering their height and diameter. To compare the study area with neighboring cloud forests, we used the Sørensen similarity coefficient and phytosociological parameters. We sampled 1250 individuals...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Upper montane cloud forest; Mountain forest; Phytosociology; Tree community; Atlantic Forest.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000300019

Structure and floristic pattern of a coastal dunes in southeastern Brazil
Provedor de dados: 39
Autores: Giaretta,Augusto; Menezes,Luis Fernando Tavares de; Pereira,Oberdan José.
The Brazilian shrublands area (restinga) is composed of marine coast vegetation on Quaternary sandy plains, where the species composition can vary depending on the surrounding ecosystems. The aims of this study were to describe the structure and floristic composition of a restinga near the community of Itaúnas, in the northern part of the state of Espírito Santo, to identify any relationships between this restinga and surrounding plant formations, and to determine which are the species that occur preferentially in the coastal forests of Espírito Santo. We sampled woody plants with a diameter at breast height &gt; 2.5 cm, excluding lianas, in 50 plots of 100 m². We selected studies of coastal forests in the states of Espírito Santo and Bahia to prepare a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytosociology; Phytogeography; Pleistocene restinga; Espírito Santo; Itaúnas.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100011

Colonization-related functional traits of plants in a 50-hectare plot of secondary tropical forest
Provedor de dados: 39
Autores: Candido,Helder Marcos Nunes; Miazaki,Ângela; Pontara,Vanessa; Bueno,Marcelo Leandro; Solar,Ricardo; Gastauer,Markus; Meira-Neto,João Augusto Alves.
ABSTRACT The growth-survival trade-off hypothesis states that functional traits of stem, wood, leaves and fruits govern acquisitive and conservative strategies of plant species that grow/survive differently in forests. We aimed to determine whether heterogeneity during the colonization of a secondary Atlantic Forest fragment causes differences in colonization-related traits and determines taxonomic composition of subplots. A total of 5,078 subplots were censused with leaf and fruit traits and height measurements being determined for each tree of each species, and with averaged-abundance-weighted values calculated for each subplot. A dendrogram was generated from the taxonomic composition of subplots using Sorensen similarity and UPGMA clustering. A total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Colonization; Fruit size; LEEP 50-ha plot; Leaf functional traits; Plant height; Wood density; Plant functional traits; Phytosociology.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000100001

Soil weed seed bank in situ and ex situ at a smallholder field in Maranhão State, northeastern Brazil
Provedor de dados: 1
Autores: Mesquita, Mário Luiz Ribeiro; Andrade, Leonaldo Alves; Pereira, Walter Esfrain.
The objective of this research was to assess the density, floristic composition,  phytosociology and diversity of a soil weed seed bank ex situ by germination in a greenhouse and in situ by weed sampling on a smallholder corn field located in Lago Verde County, Maranhão State. Fifteen pairs of 25 m2 plots were designated. In half of these plots, 90 soil samples were collected with an open metal template measuring 25 x 16 x 3 cm and placed in a greenhouse to germinate. In the other half, 90 weed samples were collected using the same metal template. We recorded a total of 1,998 individuals from 40 species, 31 genera and 16 families, from which 659 individuals germinated in situ and 1,339 exsitu. Density was higher ex situ, with 372 plants m-2. The Cyperaceae...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciências Agrárias  Fitotecnia cyperaceae; Competition; Biological invasion; Phytosociology; Smallholder farmers Botânica Sistemática  Plantas Invasoras.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19360

Effect of selective logging on floristic and structural composition in a forest fragment from Amazon Biome
Provedor de dados: 1
Autores: Rocha, Karen Janones da; Souza, Édila Cristina de; Favalessa, Cyro Matheus Cometti; Caldeira, Sidney Fernando; Martinez, Diego Tyszka; Brondani, Gilvano Ebling.
 This study was conducted in one region of a Seasonal Semideciduous Forest located in Tapurah (Mato Grosso State, Brazil) with the aim of studying its floristic and structural composition. The fixed area method was applied to 10 × 250 m clusters, allocating and measuring five clusters with five subunits of 500 m² each. Species with a diameter at breast height greater than or equal to 10 cm were considered, and the sample sufficiency of the floristic survey was verified by a species accumulation curve. The similarities between the sample subunits were calculated by the Jaccard Similarity Index, and the species diversity with the Shannon Diversity Index and Pielou Evenness Index. The horizontal vegetation structure was characterized by density, frequency,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bootstrap; Phytosociology; Environmental disturbance.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32543

Structure and regeneration capacity of a urban forest fragment - doi: 10.4025/actascibiolsci.v35i2.14810
Provedor de dados: 3
Autores: Souza, Débora Cristina; Universidade Tecnológica Federal do Paraná; Alves, Arielle Vanessa Barbosa; Universidade Tecnológica Federal do Paraná; Tolomeotti, Luciana Oliveira; Universidade Tecnológica Federal do Paraná; Silva, Jilvan Ribeiro da; Universidade Tecnológica Federal do Paraná; Franco, Janaina de Melo; Universidade Tecnológica Federal do Paraná.
Understanding the plant communities affected by human activities related to urbanization is an important tool to conserve these. In this way, this study on an urban forest fragment aimed to evaluate, through a phytosociological study and investigation of the germination of the seed bank, the current forest structure, the successional strata, and the regenerative capacity of the remnant. Three different stages comprised this research, the first with a floristic survey of the entire forest remnant, then the phytosociological study of the canopy (PAP above 10 cm) and regeneration strata (PAP 5-10 cm), and at last, the study on the seed bank. The phytosociological survey of the canopy stratum presented 1,368 individuals, with 41 species distributed into 24...
Palavras-chave: 2.05.00.00-9; 2.05.02.00-1 forest remnant; Phytosociology; Seed bank florestal Ecologia.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/14810

A study of the dry forest communities in the Dominican Republic
Provedor de dados: 42
Autores: García-Fuentes,Antonio; Torres-Cordero,Juan A.; Ruiz-Valenzuela,Luis; Lendínez-Barriga,María Lucía; Quesada-Rincón,Juan; Valle-Tendero,Francisco; Veloz,Alberto; León,Yolanda M.; Salazar-Mendías,Carlos.
This paper is a floristic and phytosociological study of the dry forest communities of the Dominican Republic. A total of 69 relevés in dry forest biotopes were carried out. The samples were subsequently subjected to Detrended Correspondence Analysis for the determination and study of possible groupings. The study does not cover tree formations growing on serpentines, nor the so-called semideciduous forests, peculiar to areas with higher rainfall. A total of nine phytocoenoses were identified. The most significant results led to the description of six new phytosociological associations: Simaroubetum berteroani(thorny dry forest on coastal dunes), Phyllostylo rhamnoidis-Prosopidetum juliflorae (southern Dominican disturbed dry forest), Consoleo...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caribbean; Endemism; Multivariate analysis; Phytosociology; Xericity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100249

Soil-vegetation relationships and community structure in a "terra-firme"-white-sand vegetation gradient in Viruá National Park, northern Amazon, Brazil
Provedor de dados: 42
Autores: MENDONÇA,BRUNO A.F. DE; FERNANDES FILHO,ELPÍDIO I.; SCHAEFER,CARLOS E.G.R.; MENDONÇA,JÚLIA G.F. DE; VASCONCELOS,BRUNO N.F.
ABSTRACT Viruá National Park encompasses a vast and complex system of hydromorphic sandy soils covered largely by the white sand vegetation ("Campinarana") ecosystem. The purpose of this study was to investigate a vegetation gradient of "terra-firme"-white sand vegetation at the Viruá National Park. Nine plots representing three physiognomic units were installed for floristic and phytosociological surveys as well as to collect composite soil samples. The data were subjected to assessments of floristic diversity and similarity, phytosociological parameters and to statistical analyses, focused on principal components (PC) and canonical correspondence analysis (CCA). The vegetation of the Campinaranas types and Forest differed in biomass and species density....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Campinarana; Canonical correlation; Monodominant species; Phytosociology.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000301269

Diversity, community structure and conservation status of an Atlantic Forest fragment in Rio de Janeiro State, Brazil
Provedor de dados: 49
Autores: Cysneiros,Vinicius Costa; Mendonça-Junior,Joaquim de Oliveira; Gaui,Tatiana Dias; Braz,Denise Monte.
The State of Rio de Janeiro still holds unknown portions of the Atlantic Forest, which represent gaps in the knowledge of this ecosystem. Paracambi and neighbor municipal districts comprise a vast stretch of virtually unknown forest that makes up part of the Serra do Mar biodiversity corridor. The following study describes the tree community structure in a stretch of the ombrophilous Atlantic Forest, in the Parque Natural Municipal do Curió (Curio MNP), Paracambi, Rio de Janeiro, which serves as the basis to evaluate species diversity and conservation status. The altitudes in the area ranges from 100 to 690 m and the climate varies from mild subtropical to tropical hot and humid. Forty plots (10x10m) were randomly placed along the area, where all the stems...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tropical rain forest; Phytosociology; Ecological succession; Serra do Mar biodiversity corridor; Curio Municipal Natural Park- Paracambi.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000200201

Community structure and tree diversity in a subtropical forest in southern Brazil
Provedor de dados: 49
Autores: Bordin,Kauane Maiara; Ferreira,Letícia Daiana; Rosina,Adriano; Malacarne,Marciana; Zanotelli,Patricia; Adami,Samuel Fernando; Vendruscolo,Giovana Secretti.
Abstract: Local and regional environmental variations lead to different species composition, creating transitional areas. An example is the Araucaria and Seasonal forest in southern Brazil. Our objectives were (1) to describe the tree community structure and composition of a subtropical forest in southern Brazil and (2) to compare the floristic relationships between two forest typologies (Araucaria and Seasonal forest) in order to characterize the study area and the distribution patterns of tree species. We conducted a survey at Chapecó National Forest (in southern Brazil) in an area of 1.2 ha, where all individuals ≥ 30 cm of circumference at breast height were sampled. Community structure was described using the traditional phytosociological parameters....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Araucaria forest; Biodiversity conservation; Floristic similarity; Phytosociology; Seasonal forest; Transitional forest.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000200208

Small but important: The woody vegetation communities on the sandstone outcrops of Teyú Cuaré (Misiones, Argentina)
Provedor de dados: 51
Autores: VELAZCO,SANTIAGO JOSÉ ELÍAS; KELLER,HÉCTOR ALEJANDRO; GALVÁO,FRANKLIN.
Rock outcrops are commonly harsh environments that maintain important components of biodiversity because they are inhabited by endemic or relictual species. We studied the diversity and structure of the woody plant of rupestrian vegetation located in the San Ignacio department (Misiones, Argentina), and evaluated the beta diversity with respect to other neighbor vegetation formation (i.e. forest and savanna). We found 32 species, most of them were arboreal nonetheless of small size. Qualea cordata (Mart.) Spreng., Monvillea euchlora Backeb., Ocotea lancifolia (Schott) Mez and Myrciaria delicatula (DC.) O.Berg were the most important in the community structure. Rupestrian vegetation showed an intermediate woody species diversity compared to nearby forests...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rock outcrops; Phytosociology; Rupestrian vegetation; Endemic species.
Ano: 2018
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722018000300006

Arboreous vegetation of an alluvial riparian forest and their soil relations: Porto Rico island, Paraná river, Brazil
Provedor de dados: 52
Autores: Campos,João Batista; Souza,Maria Conceição de.
The dynamics of alluvial deposits in floodplains forms islands and sandbanks. Deposits frequently accumulate at the river margins and on islands with consequent side growths. One of these sandbanks which started to form in 1952 annexed an area of 12.4ha to the Porto Rico island (53º15’W and 22º45’S). At present a forest fragment of approximately 2.0 ha exists in this place. The structural analysis of arboreous vegetation of this fragment showed a floristic gradient related to the physical and chemical variations of the substratum. High density of pioneer species associated to the absence of recruitment of new individuals of these and other successional categories indicated that the forest was impaired in its succession process. This fact could be...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alluvial forest; Floodplain; Forest structure; Phytosociology; Riparian vegetation; Succession.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000200004

Phytosociological studies on natural establishment of vegetation in an unreclaimed limestone mining
Provedor de dados: 52
Autores: Frenedozo-Soave,Rita de Cássia.
Phytosociological structure was studied in limestone mining quarries at Rio Claro, São Paulo, Brazil. Quarries presented a chronosequence, ranging 1 to 40 years old, with focus on vegetation community organization, floristic similarity and plant diversity of three areas in different successive stages, devastated by limestone mining. A total of 1957 individuals distributed in 32 botanical families and 91 species were sampled. Low species diversity was obtained, ranged among quarries ages. In the early-established quarries, Leguminosae, Malvaceae and Sterculiaceae were the families most representative in number of species, while for the age 27, Asteraceae and Poaceae were the most representative. Diversity indices indicated that species diversity changed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Phytosociology; Mining quarry; Limestone mine; Spoil banks; Floristic.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000200018

Structure, composition and spatial distribution of tree species in a remnant of the semideciduous seasonal Alluvial Forest of the upper Paraná River Floodplain
Provedor de dados: 52
Autores: Campos,João Batista; Romagnolo,Mariza Barion; Souza,Maria Conceição de.
The aim of this investigation was to study the structure, distribution patterns, and dynamics of tree species in a remnant of the Semideciduous Seasonal Alluvial Forest in the Upper Paraná River Floodplain, Brazil. Spatial variation of the vegetation was considered mainly in relation to soil and topographic characteristics. The 5,946 m² study area extended along a transect from the bank of the Paraná River across the floodplain, passing through a lake. Phytosociological analysis were performed for 36 plots, each 150 m². Subanalysis were performed for 300 m² zones. Soil characteristics and topographic profile and their relationship to the vegetation were analyzed. Hydrodynamic and sediment processes were the most important factors in vegetation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alluvial forest; Floristic distribution; Hidrodynamic; Phytosociology; Riparian forest.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000200008

Comparative phytosociology of tree sinusiae between contiguous forests in different stages of succession
Provedor de dados: 57
Autores: CAVALCANTE,A. DE M. B.; SOARES,J. J.; FIGUEIREDO,M. A.
The Baturité Mountain Range, located in the State of Ceará (BRA), displays on its highest levels a vegetation viewed as a disjunction from the Atlantic Forest in the East of Brazil. Among the various attributes associated with this vegetation, the abundance of water resources and a high biodiversity have a more outstanding relevance. However, in view of the current accelerated deforestation process, those attributes may be threatened in a near future. Therefore, the present work is a comparative study with its focus on vegetal community organization (tree sinusiae) and the floristic similarity and the phytodiversity of two areas in different successive stages, preserved and deforested 24 years ago. The aim of that intent was to obtain information that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tropical forest; Phytosociology; Vegetation.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000400003