Biodiversity loss along a gradient of deforestation in Amazonian landscapes.

Decaëns Thibaud, Martins Marlucia Bonifacio, Feijoo Alexander, Oszwald Johan, Dolédec Sylvain, Mathieu Jérôme, De Sartre Xavier Arnaud, Bonilla Diego, Brown George G., Cuellar Criollo Yeimmy Andrea, Dubs Florence, Furtado Ivaneide S., Gond Valéry, Gordillo Erika, Le Clec'h Solen, Marichal Raphaël, Mitja Danielle, de Souza Izildinha Miranda, Praxedes Catarina, Rougerie Rodolphe, Ruiz Dario H., Otero Joel Tupac, Velasquez Alexander, Zararte Luc Elena M., Lavelle Patrick. 2018. Biodiversity loss along a gradient of deforestation in Amazonian landscapes.. Conservation Biology, 32 (6) : 1380-1391.

Quartile : Outlier, Sujet : BIODIVERSITY CONSERVATION / Quartile : Q1, Sujet : ECOLOGY / Quartile : Q1, Sujet : ENVIRONMENTAL SCIENCES

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.

Mots-clés Agrovoc : biodiversité, paysage agricole, utilisation des terres, gestion des ressources naturelles, intensification, services écosystémiques

Mots-clés géographiques Agrovoc : Amazonie, Brésil, Colombie

Classification Agris : P01 - Conservation de la nature et ressources foncières
E11 - Économie et politique foncières

Champ stratégique Cirad : Axe 6 (2014-2018) - Sociétés, natures et territoires

Auteurs et affiliations

• Decaëns Thibaud, UM2 (FRA) - auteur correspondant
• Martins Marlucia Bonifacio, MPEG (BRA)
• Feijoo Alexander, Universidad Tecnológica de Pereira (COL)
• Oszwald Johan, Université de Haute-Bretagne (FRA)
• Dolédec Sylvain, UCLB (FRA)
• Mathieu Jérôme, Université Paris-Sorbonne (FRA)
• De Sartre Xavier Arnaud, UPPA (FRA)
• Bonilla Diego, Insectos de Colombia (COL)
• Brown George G., EMBRAPA (BRA)
• Cuellar Criollo Yeimmy Andrea, University of Amazonia (COL)
• Dubs Florence, IRD (FRA)
• Furtado Ivaneide S., MPEG (BRA)
• Gond Valéry, CIRAD-ES-UPR BSef (FRA) ORCID: 0000-0002-0080-3140
• Gordillo Erika, University of Amazonia (COL)
• Le Clec'h Solen, Université de Haute-Bretagne (FRA)
• Marichal Raphaël, CIRAD-PERSYST-UPR Systèmes de pérennes (FRA) ORCID: 0000-0001-9070-5749
• Mitja Danielle, IRD (FRA)
• de Souza Izildinha Miranda, UFRA (BRA)
• Praxedes Catarina, MPEG (BRA)
• Rougerie Rodolphe, MNHN (FRA)
• Ruiz Dario H., Universidad Tecnológica de Pereira (COL)
• Otero Joel Tupac, Universidad Nacional de Colombia (COL)
• Velasquez Alexander, University of Amazonia (COL)
• Zararte Luc Elena M., Instituto Tecnológico del Putumayo (COL)
• Lavelle Patrick, IRD (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/589563/)

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