Biodiversity loss along a gradient of deforestation in Amazonian agricultural landscapes - HAL Accéder directement au contenu
Article dans une revue Conservation Biology Année : 2018

Biodiversity loss along a gradient of deforestation in Amazonian agricultural landscapes

Résumé

Assessing how much management of agricultural landscapes, in addition to protected areas, can offset biodiversity erosion in the tropics is a central issue for conservation that still requires cross-taxonomic and landscape-scale studies. We measured the effects of Amazonia deforestation and subsequent land-use intensification in 6 agricultural areas (landscape scale), where we sampled plants and 4 animal groups (birds, earthworms, fruit flies, and moths). We assessed land-use intensification with a synthetic index based on landscape metrics (total area and relative percentages of land uses, edge density, mean patch density and diversity, and fractal structures at 5 dates from 1990 to 2007). Species richness decreased consistently as agricultural intensification increased despite slight differences in the responses of sampled groups. Globally, in moderately deforested landscapes species richness was relatively stable, and there was a clear threshold in biodiversity loss midway along the intensification gradient, mainly linked to a drop in forest cover and quality. Our results suggest anthropogenic landscapes with high-quality forest covering >40 % of the surface area may prevent biodiversity loss in Amazonia.
Fichier principal
Vignette du fichier
decans2018.pdf ( 505.86 Ko ) Télécharger
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01922346, version 1 (27-11-2018)

Identifiants

Citer

Thibaud Decaens, Marlucia Martins, Alex Feijoo, Johan Oszwald, Sylvain Dolédec, et al.. Biodiversity loss along a gradient of deforestation in Amazonian agricultural landscapes. Conservation Biology, 2018, 32 (6), pp.1380 - 1391. ⟨10.1111/cobi.13206⟩. ⟨hal-01922346⟩
797 Consultations
2104 Téléchargements
Dernière date de mise à jour le 21/04/2024
comment ces indicateurs sont-ils produits

Altmetric

Partager

Gmail Facebook Twitter LinkedIn Plus