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| Registros recuperados: 70 | |
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| 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 |
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| 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) > 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 (24º31S e 50º25W) 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 70 | |
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