IUCN / SSC Cat Specialist Group - Digital Cat Library |
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| Magioli, M. | |
| Conserva‡Æo de mam¡feros de m‚dio-grande porte em paisagem agr¡cola: estrutura de assembleias, ecologia tr¢fica e diversidade funcional | |
| 2013 Full Book | |
The scarcity of studies regarding the impacts of agricultural mosaics on biodiversity hinders the creation of conservation strategies and a need for information concerning the ecology and behavior of wildlife species. In this context, the present study aimed to: 1) determine the composition and structure of mammal assemblages of medium and large sized in an agricultural landscape at Atlantic Forest; 2) evaluate the puma (_Puma concolor_) feeding pattern through analysis of stable isotopes (SIA) in two agricultural mosaics; 3) analyze mammal assemblages by functional diversity (FD) in forest remnants distributed in major biogeographic regions of the Atlantic Forest, and identify ecological thresholds for conservation. For mammal's inventory, eight forest remnants were selected in Campinas Metropolitan Region (RMC), SÆo Paulo state. Data were collected through active search (visualizations and tracks), resulting in the record of 24 mammal species. The species richness and composition pointed RMC as an important area for mammal's conservation. Carbon and nitrogen stable isotopes were analyzed in pumas hair, obtained from fecal samples collected by active search in forest remnants embedded in agricultural landscapes in SÆo Paulo state. There was a higher consumption of C3 prey (~ 47% of individuals) in the areas with the highest proposition of forest coverage, and greater consumption of C4 prey (~ 40% of individuals) where the agricultural matrix was predominant. Was observed the consumption of prey with diet based on food items from both forest remnants and agricultural matrix, suggesting high behavioral plasticity of puma's and their prey's occupying areas heavily impacted by man. Stable isotopes contributed with pioneer information on trophic ecology, aiming the development of new conservation strategies in anthropogenic areas. A database consisting of 49 mammal's assemblages, created from primary and secondary data of inventories, was used for FD analysis and thresholds existence was verified using the "segmented" function, available on R program. FD was different between mammal assemblages with the same species richness, indicating that environmental filters may affect its values. It was concluded that both SIA as the FD can be considered important tools to outline strategies and actions for mammal's conservation. |
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