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| Registros recuperados: 70 | |
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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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| 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) > 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 |
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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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| 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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| 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 |
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| 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 > 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 |
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| 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 |
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| 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] > 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 > 30 cm and DBH < 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 |
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| 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 |
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| 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 |
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| 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 > 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 |
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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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| 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 |
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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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| Registros recuperados: 70 | |
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