Consulta: subjectFacets:"Seasonal forest"
Registros recuperados: 7
Data/hora: 07/06/2024 02:30:42

Bird communities in three forest types in the Pernambuco Centre of Endemism, Alagoas, Brazil
Provedor de dados: 76
Autores: Lobo-Araújo,Lahert W.; Toledo,Mário T. F.; Efe,Márcio A.; Malhado,Ana C. M.; Vital,Marcos V. C.; Toledo-Lima,Guilherme S.; Macario,Phoeve; Santos,Jhonatan G. dos; Ladle,Richard J.
The Pernambuco Center of Endemism (PCE) in northeastern Brazil is highly fragmented and degraded. Despite its potential conservation importance the bird fauna in this area is still relatively unknown and there are many remnant fragments that have not been systematically surveyed. Here, we report the results of bird surveys in five forest fragments (one pioneer, two ombrophilous and two seasonal). In total, 162 taxa were recorded, 12 of which are endemic to the PCE. The frequency of endangered species was lower than what has been reported in studies from the same area and most of the taxa considered to be at risk of extinction were sub-species of uncertain taxonomic validity. The comparatively low number of endemic/threatened species may be due to the small...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avifauna; Ombrophilous forest; Restinga; Seasonal forest; Species richness.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212013000200002

Arthropod recolonization in the restoration of a semideciduous forest in southeastern Brazil
Provedor de dados: 82
Autores: Pais,Mara P; Varanda,Elenice M.
The use of arthropods for monitoring habitat changes has grown widely in the last decades. In Brazil, however, most of the studies in restored areas have involved only vegetation changes. The present study aimed at investigating recolonization patterns of epigeic arthropods in recently restored sites of semideciduous forests in southeastern Brazil. We compared the community structure of adjoining sites 5, 17, 29 and 36 months old with that at a nearby forest remnant (reference site). We also determined the most abundant species and looked for ecological indicator species of each site age. Arthropods were sampled using pitfall traps, and their assemblages were described and compared with multi- and univariate statistical methods. Species abundance and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Formicidae; Seasonal forest; Monitoring; Ecological indicator.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000200009

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

Allometric models to estimate tree height in northern Amazonian ecotone forests
Provedor de dados: 36
Autores: BARBOSA,Reinaldo Imbrozio; RAMÍREZ-NARVÁEZ,Perla Natalia; FEARNSIDE,Philip Martin; VILLACORTA,Carlos Darwin Angulo; CARVALHO,Lidiany Camila da Silva.
ABSTRACT Allometric models defining the relationship between stem diameter and total tree height in the Amazon basin are important because they refine the estimates of tree carbon stocks and flow in the region. This study tests different allometric models to estimate the total tree height from the stem diameter in an ecotone zone between ombrophilous and seasonal forests in the Brazilian state of Roraima, in northern Amazonia. Stem diameter and total height were measured directly in 65 recently fallen trees (live or dead). Linear and nonlinear regressions were tested to represent the D:H relation in this specific ecotone zone. Criteria for model selection were the standard error of the estimate (Syx) and the adjusted coefficient of determination (R²adj),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometry; Amazon forest; Hypsometric relationships; Dendrometry; Seasonal forest.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000200081

Beta diversity patterns of Bromeliaceae growing on rocky cliffs within the Atlantic Forest in southern Brazil
Provedor de dados: 49
Autores: Melo,Edilaine Andrade; Waechter,Jorge Luiz.
Abstract: In recent years there has been increasing attention in patterns of β-diversity and mechanisms related to variations in species composition. In this study, we evaluated beta diversity patterns of bromeliads growing on cliffs immersed in Atlantic Forest. We hypothesized that the species composition varies according to the spatial scale, inferring that there is a replacement of species influenced mainly by environmental factors. The study was carried out on sandstone cliffs included in contiguous but distinct vegetation formations: Evergreen and Seasonal forests. Twenty-four vertical rocky outcrops were sampled. The spatial variation in species composition was evaluated by two β-diversity components, turnover and nestedness. Multivariate analysis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sandstone outcrops; Bromeliads; Evergreen forest; Seasonal forest; Niche Theory; Neutral Theory.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000100211

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

Environmental variables and tree population structures in deciduous forests of central Brazil with different levels of logging
Provedor de dados: 52
Autores: Vieira,Daniel Luis Mascia; Scariot,Aldicir.
Population structures of six tree species in three fragments of intact seasonal deciduous forest and three fragments disturbed by logging were studied in the northeastern Goiás. Forty random 400 m² plots were allocated in each fragment to survey plant population structures, number of stumps, cattle feces, burnt logs, and canopy openness. Soil cover by life forms was estimated in 1m² sub-plots. Lianas were abundant in intermediately logged fragments and invasive herbs in the most disturbed fragment. Cattle avoided dense herbaceous strata, such as liana tangles. Cavanillesia arborea, Eugenia dysenterica and Swartzia multijuga trees occurred at very low densities in all the fragments and their seedlings were practically absent, which might endanger their...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seasonal forest; Canopy openness; Plant cover; Cattle grazing; Lianas.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000200024