Biodiversity loss along a gradient of deforestation in Amazonian agricultural landscapes

Thibaud Decaens; Marlucia Martins; Alex Feijoo; Johan Oszwald; Sylvain Dolédec; Jérôme Mathieu; Xavier Arnauld de Sartre; Diego Bonilla; George Brown; Yeimmy Andrea Cuellar Criollo; Florence Dubs; Ivaneide Furtado; Valérie Gond; Erika Gordillo; Solen Le Clec'H; Raphaël Marichal; Danielle Mitja; Izildinha Miranda de Souza; Catarina Praxedes; Rodolphe Rougerie; Darío Ruiz; Joel Tupac Otero; Catalina Sanabria; Alex Velasquez; Luz Elena M. Zararte; Patrick Lavelle

doi:10.1111/cobi.13206

Journal articles

Biodiversity loss along a gradient of deforestation in Amazonian agricultural landscapes

Thibaud Decaens ¹ Marlucia Martins ² Alex Feijoo ³ Johan Oszwald ⁴ Sylvain Dolédec ⁵ Jérôme Mathieu ⁶ Xavier Arnauld de Sartre ⁷ Diego Bonilla ⁸ George Brown ⁹ Yeimmy Andrea Cuellar Criollo ¹⁰ Florence Dubs ^{11, 12, 13} Ivaneide Furtado ² Valérie Gond ¹⁴ Erika Gordillo ¹⁰ Solen Le Clec'H ⁴ Raphaël Marichal ¹⁵ Danielle Mitja ^{16, 12} Izildinha Miranda de Souza ¹⁷ Catarina Praxedes ² Rodolphe Rougerie ¹⁸ Darío Ruiz ³ Joel Tupac Otero ¹⁹ Catalina Sanabria ²⁰ Alex Velasquez ¹⁰ Luz Elena M. Zararte ²¹ Patrick Lavelle ^{20, 12}

1 ECODIV - Étude et compréhension de la biodiversité

2 Laboratorio de Ecologia de Invertebrado, Coordenacao de Zoologia

3 Universidad Tecnologica de Pereira

4 LETG - Rennes - Littoral, Environnement, Télédétection, Géomatique

LETG - Littoral, Environnement, Télédétection, Géomatique UMR 6554

5 LEHNA - Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés

6 IEES - Institut d'écologie et des sciences de l'environnement de Paris

7 Passages

8 Insectos de Colombia

9 Embrapa Florestas

10 Universidad de la Amazonia, Florencia, Caqueta

11 ESE - Écologie et santé des écosystèmes

12 IRD - Institut de Recherche pour le Développement

13 IEES (UMR_7618 / UMR_D_242 / UMR_A_1392 / UM_113) - Institut d'écologie et des sciences de l'environnement de Paris

14 UPR BSEF - Biens et services des écosystèmes forestiers tropicaux : l'enjeu du changement global

15 UPR Système de pérennes - Performance des systèmes de culture des plantes pérennes

16 UMR 228 Espace-Dev, Espace pour le développement

17 UFRA - Universidade Federal Rural da Amazonia

18 ISYEB - Institut de Systématique, Evolution, Biodiversité

19 Universidad Nacional de Colombia Sede Palmira

20 CIAT - International Center for Tropical Agriculture [Colombie]

21 Intituto Tecnologico del Putumayo

Abstract : 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.

Keywords : landscapeintensification Colombia Brazil biodiversityerosion biodiversityconservation threshold land-use changes

Document type :

Journal articles

Domain :

Humanities and Social Sciences / Geography

Environmental Sciences / Biodiversity and Ecology

Environmental Sciences

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Submitted on : Tuesday, November 27, 2018 - 11:22:44 AM
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Biodiversity loss along a gradient of deforestation in Amazonian agricultural landscapes

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