Although the conservation of tropical biodiversity depends on protected areas, there is still a very large ‘gap’ of knowledge on the flora of Brazilian reserves, especially in the Northeast region of Brazil. Field and herbarium surveys of the phanerogamic flora of the Ubajara National Park, located on the Brazilian Northeast, were made and analyses on phenology and dispersal syndromes were performed. 418 taxa (...
Variation in environmental conditions during the Quaternary period served as important fi lters for the maintenance of vegetation types and for determining the composition of the current biota. We analyzed oscillations in the distributions of diff erent vegetation types in Brazil during the Quaternary period using species of the genus Erythroxylum (Erythroxylaceae) because of the vast heterogeneity of habitats ...
Variation in environmental conditions during the Quaternary period served as important fi lters for the maintenance of vegetation types and for determining the composition of the current biota. We analyzed oscillations in the distributions of diff erent vegetation types in Brazil during the Quaternary period using species of the genus Erythroxylum (Erythroxylaceae) because of the vast heterogeneity of habitats ...
Although the conservation of tropical biodiversity depends on protected areas, there is still a very large ‘gap’ of knowledge on the flora of Brazilian reserves, especially in the Northeast region of Brazil. Field and herbarium surveys of the phanerogamic flora of the Ubajara National Park, located on the Brazilian Northeast, were made and analyses on phenology and dispersal syndromes were performed. 418 taxa (...
A distribuição das plantas é influenciada por inúmeros fatores que controlam os limites das populações e a capacidade de dispersão para novas áreas. Em geral, os fatores ambientais que atuaram como filtros nos locais de surgimento de linhagens (zonas ecológicas de origem) são similares aos encontrados nos atuais locais de ocorrência. Os estudos sobre as oscilações dos fatores ambientais permitem analisar como a...
Numerous studies have sought to understand the relationship between plant distribution and occupation time in different vegetation types. In order to analyze this relationship, we chose the genus Erythroxylum to elucidate the biogeographic history, the phylogenetic relationships between the Asian, neo and paletropical species and the expansion of the area of occurrence in Brazilian territory. The present study ...
The high species richness and endemism in the tropical region is influenced by the amount of vegetation types and environmental conditions favorable for the maintenance of diversity. For this study we selected the genus Erythroxylum, which in Brazil is one of the most important centers of endemism, totaling 74 species with restricted distribution in the country. Erythroxylum are recognized in 19 sections, nine ...