Black Curassow habitat relationships in terra firme forests of the GuianaShield: A multiscale approach
2016
Denis, Thomas | Hérault, Bruno | Jaouen, Gaëlle | Brunaux, Olivier | Guitet, Stéphane | Richard Hansen, Cécile | Office National de la Chasse et de la Faune Sauvage [Kourou, Guyane] ; Institut National de la Recherche Agronomique (INRA)-AgroParisTech-Université de Guyane (UG)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (Pôle Guadeloupe) ; Université des Antilles (UA)-Université des Antilles (UA) | Ecologie des forêts de Guyane (UMR ECOFOG) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-AgroParisTech-Université de Guyane (UG)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) | Recherche, développement et innovation (ONF-RDI) ; Office National des Forêts (ONF) | Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [Occitanie]) | Ecologie des forêts de Guyane (UMR ECOFOG) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-AgroParisTech-Université de Guyane (UG)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Funding was provided over many yearsby ONCFS and various external sources: the EU HABITATand CHASSE programs, the French Ministry for OverseasTerritories, the French Ministry of the Environment (ECOTROPprogram), the Parc Amazonien de Guyane (PAG),Office National des Forêts, and the CNRS (Centre national dela recherche scientifique) Nouragues program. T.D. and B.H.were supported by a grant from the Investing for the Futureprogram (Investissements d’Avenir) managed by the FrenchNational Research Agency (Agence nationale de la recherche,CEBA, ref. ANR-10-LABX-0025). | ANR-10-LABX-0025,CEBA,CEnter of the study of Biodiversity in Amazonia(2010)
International audience
显示更多 [+] 显示较少 [-]英语. The Black Curassow (Crax alector) is a large game bird with Vulnerable conservation status found in north-central South America. We examined its distributional pattern across French Guiana using a large number of environmental descriptors at 3 scales of analysis: landscape, forest type, and microhabitat. We used a hierarchical model with temporary emigration and imperfect detection for data collected by standard distance sampling methods at 35 study sites. At the landscape scale, Black Curassow density decreased with hunting pressure and increased with steeper slopes in both hunted and unhunted areas. Topography appeared to be a good proxy for Black Curassow ecological requirements and probably reflected habitat quality. At the forest scale, population density was negatively correlated with the abundance of palms and Mimosoideae and positively correlated with the abundance of Lauraceae. Botanical families did not directly influence Black Curassow distribution, but rather determined spatial patterns by being markers of a particular forest type. At the microhabitat scale, Black Curassows used hilltops more frequently than other parts of the local topographical gradient. Our multiscale analysis shows that this species' distribution can be explained by biotic or abiotic conditions, regardless of the scale. For conservation, we recommend maintaining connectivity between Black Curassow populations separated by hunted areas. Our predicted densities could be used to adapt hunting quotas across French Guiana's forests. We show that combining field and remote sensing data helps to understand the ecological processes responsible for Black Curassow habitat relationships.
显示更多 [+] 显示较少 [-]