Results: 79

Formación del banco de semillas durante la revegetación temprana de áreas afectadas por la minería en un bosque pluvial tropical del Chocó, Colombia

Rev. biol. trop; 65 (1), 2017
ResumenLa minería es una de las principales actividades económicas en muchas regiones tropicales y también es la causa de la devastación de amplias superficies de bosques tropicales naturales. El conocimiento del potencial regenerativo de las áreas alteradas por minería es vital para la restauraci�...

Effect of a major highway on the spatial and temporal variation in the structure and diversity of the avifauna of a tropical premontane rain forest

Rev. biol. trop; 64 (4), 2016
Abstract:Roads immersed in conservation areas will increase in number, size, and traffic over the next decade, and thus, understanding their effects on forest-dependent wildlife is crucial for improving current management practices and reducing the negative impacts of roads on sensitive species. We exami...

Seedling growth and survival of five tree species in secondary forests and adjacent pastures in the montane rain forests of Southern Costa Rica

Rev. biol. trop; 64 (4), 2016
Abstract:Successful forest restoration in tropical environments is limited by the paucity of studies on the initial establishment and early survival requirements of seedlings of most native tropical tree species under disturbed conditions. Here, we evaluated the initial growth responses and the regenerat...

Dinámica de raíces finas y su relación con la fertilidad edáfica en bosques pluviales tropicales del Chocó biogeográfico colombiano

Rev. biol. trop; 64 (4), 2016
Resumen:Las raíces finas juegan un papel importante en la adquisición de agua y minerales del suelo, el balance global del carbono y la mitigación del cambio climático. La dinámica (productividad-PRF y recambio-RRF) de raíces finas es esencial para el ciclo de nutrientes y balance de carbono de los...

Regression models for estimating leaf area of seedlings and adult individuals of Neotropical rainforest tree species

Braz. j. biol; 76 (4), 2016
Abstract Individual leaf area (LA) is a key variable in studies of tree ecophysiology because it directly influences light interception, photosynthesis and evapotranspiration of adult trees and seedlings. We analyzed the leaf dimensions (length – L and width – W) of seedlings and adults of se...

Understory bat roosts, availability and occupation patterns in a Neotropical rainforest of Costa Rica

Rev. biol. trop; 64 (3), 2016
Abstract:The strong link between bats and their roosts is widely recognized as being particularly significant. Despite this, roosting ecology of bats is poorly understood and much of the basic information is still unknown. In this study, we investigated the availability and occupation patterns of four ro...

Vascular epiphytes in seasonal semideciduous forest in the State of Espírito Santo and the similarity with other seasonal forests in Eastern Brazil

Acta sci., Biol. sci; 38 (2), 2016
In this study, we evaluated the floristic composition of vascular epiphytes in seasonal semideciduous forest fragments of the Itapemirim River basin, Southern State of Espírito Santo, in order to verify its similarity to other semideciduous forests studied in Brazil. Excursions were conducted every fort...

Distribuição de mercúrio total em sedimentos da plataforma continental Amazônica: Brasil

Acta amaz; 42 (2), 2012
Este estudo foi desenvolvido na Plataforma Continental do Amazonas (PCA) com o objetivo de determinar os níveis de Hg total no sedimento de fundo, e assim contribuir como matriz ambiental indicadora para o plano geral de gerenciamento costeiro na região norte do Brasil. Foram amostrados 20 pontos entre...

Sphagnum (velvet) species used by rural communities at the Guaratuba EPA, Paraná State, Brazil

Acta sci., Biol. sci; 34 (2), 2012
The results of a survey of Sphagnum used by the Descoberto and Empanturrado rural communities (Guaratuba municipality and Guaratuba Environmental Protected Area – EPA) are presented. The analysis was based on fresh material collected in different harvesting areas. Five species were recorded: S. capilli...

Fine-root production in two secondary forest sites with distinct ages in Eastern Amazon

Acta amaz; 42 (1), 2012
The objective of this work was to assess the fine-root (≤ 2 mm diameter) production dynamics of two forest regrowths at different ages. Fine-root production was monitored by the ingrowth core method in one 18-year-old site (2 ha) and one 10-year-old site (0.5 ha), both localized in the Apeú region, No...