Aim: Seasonally dry tropical forest (SDTF) of the Caribbean Islands (primarily West Indies) is floristically distinct from Neotropical SDTF in Central and South America. We evaluate whether tree species composition was associated with climatic gradients or geographical distance. Turnover (dissimilarity) in species composition of different islands o...
A variação da riqueza de espécies entre diferentes mosaicos rurais e tipos de uso da terra foi analisada em escala local e da paisagem. Nove tipos de uso entre três mosaicos rurais foram comparados através de curvas de rarefação estabelecidas para três estratos verticais da vegetação. A riqueza foi fortemente influenciada pela composição dos tipos ...
O presente estudo objetiva avaliar o efeito das métricas de uma paisagem antropizada em diferentes escalas sobre os diferentes estratos da vegetação. Foram realizadas RDA entre as variáveis da vegetação vs. métricas de paisagem. As métricas proporção de área não-florestada e densidade de fragmentos influenciaram os três estratos da vegetação em tod...
La pratique de l'abattis-brûlis domine la partie Est de Madagascar où les forêts ombrophiles et les recrus âgés sont coupés et bru lés pour une mise en culture temporaire. Après abandon de la culture, la régénération de la forêt se fait spontanément. La dynamique de la composition floristique des recrus forestiers est étudiée dans le corridor fores...
We studied the tree-regeneration patterns in three distinct agricultural settlements in the Eastern Amazon to test the influence of land-use mosaics. The following questions are addressed: are the floristic structure and composition of regenerating trees affected by the various land-use types applied in the agricultural settlements? Do tree-regener...
Un suivi de la succession végétale entre deux dates à 15 ans d'intervalle a été réalisé en forêt sèche de Mikea (sud-ouest de Madagascar) à partir de relevés floristiques et de mesures de phytomasse (herbacée, ligneuse et racinaire). La richesse floristique, l'indice de diversité de Shannon (H'), la proportion des espèces annuelles, la densité des ...
We studied the tree-regeneration patterns in three distinct agricultural settlements in the Eastern Amazon to test the influence of land-use mosaics. The following questions are addressed: are the floristic structure and composition of regenerating trees affected by the various land-use types applied in the agricultural settlements? Do tree-regener...
We studied the tree-regeneration patterns in three distinct agricultural settlements in the Eastern Amazon to test the influence of land-use mosaics. The following questions are addressed: are the floristic structure and composition of regenerating trees affected by the various land-use types applied in the agricultural settlements? Do tree-regener...
Le maintien de la biodiversité terrestre dépend, à Madagascar, de la conservation des forêts. C'est pourquoi le corridor forestier de Fianarantsoa (Centre Est de Madagascar) représente un enjeu national pour la politique de conservation. La connaissance de l'état de la forêt est une étape nécessaire pour définir une stratégie de conservation. Nous ...
