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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

How to not inflate population estimates? Spatial density distribution of white-lipped peccaries in a continuous Atlantic forest

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Autor(es):
Norris, D. [1] ; Rocha-Mendes, F. [1, 2] ; de Barros Ferraz, S. Frosini [3] ; Villani, J. P. [4] ; Galetti, M. [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Estadual Paulista, Dept Ecol, Lab Biol Conservacao, BR-13506900 Rio Claro, SP - Brazil
[2] Neotrop Inst Res & Conservat, Curitiba, PR - Brazil
[3] Univ Sao Paulo, Escola Super Agr Luiz De Queiroz, Dept Ciencias Florestais, Piracicaba, SP - Brazil
[4] Nucleo Santa Virginia, Sao Luiz De Paraitinga, SP - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: ANIMAL CONSERVATION; v. 14, n. 5, p. 492-501, OCT 2011.
Citações Web of Science: 9
Resumo

In a world with poor biological inventorying and rapid land-use change, predicting the spatial distribution of species is fundamental for the effective management and conservation of threatened taxa. However, on a regional scale, predicting the distribution of rare terrestrial mammals is often unreliable and/or impractical, especially in tropical forests. We apply a recently developed analytic process that integrates density estimation (kernel smoothing), niche-analysis and geostatistics (regression-kriging) to model the occupancy and density distribution of a threatened population of white-lipped peccaries Tayassu pecari in a Brazilian Atlantic forest. Locations (n = 45) within a protected area of the Serra-do-Mar state park were obtained from diurnal line transect census (233 km), camera-trapping (751 camera-trap days) and surveys (4626 km) conducted by park rangers. Niche modelling (environmental niche-factor analysis and MAXENT) revealed a restricted niche compared with the available habitat as defined by seven environmental variables. From the occupancy model obtained from regression-kriging, we found that 72% of a 170km(2) protected area is likely to be used by peccaries. We demonstrate that the distribution of large mammals can be restricted within continuous areas of Atlantic forest and therefore population estimates based on the size of protected areas can be overestimated. Our findings suggest that the generation of realized density distributions should become the norm rather than the exception to enable conservation managers and researchers to extrapolate abundance and density estimates across continuous habitats and protected areas. (AU)

Processo FAPESP: 07/00613-1 - Efeitos da defaunação na herbivoria, pisoteio de plântulas, remoção e predação de sementes na Floresta Atlântica
Beneficiário:Fabiana Rocha Mendes
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 07/03392-6 - Efeitos de um gradiente de defaunação na herbivoria, predação e dispersão de sementes: uma perspectiva na Mata Atlântica
Beneficiário:Mauro Galetti Rodrigues
Linha de fomento: Auxílio à Pesquisa - Temático