IDEA   23902
INSTITUTO DE DIVERSIDAD Y ECOLOGIA ANIMAL
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Defaunation in South American Gran Chaco: richness and distribution of mammals across different land uses
Autor/es:
BOAGLIO, GABRIEL; CASTRO L; LASSAGA V., MOLINA F.; BARRI F
Lugar:
Washington
Reunión:
Congreso; 99th Annual Meeting & Centennial Celebration of American Society of Mammalogists; 2019
Resumen:
The Gran Chaco region was historically covered by primary forests and woodlands, alternating with patches of grasslands, but has undergone a profound transformation since the 1990s, experiencing a rapid loss of native forests due to the expansion of agriculture. Currently, this region is a matrix with different land uses. This has had an indirect impact in the native fauna (along with direct impacts like hunting), resulting in extreme reduction of population densities or extinction of species. The aim of our presentation is to characterize the defaunation process of medium and large mammals across different land uses in the southern portion of the Gran Chaco Americano, corresponding to the Northwest of Córdoba province, Argentina. We have installed 10 camera traps (active for 30 days) in five representative sites, in all five land use categories: Primary Forest, Secondary Forest, Selective Clearing, Bushland and Crops (25 study sites: 250 sampling stations), in order to analyze the native mammal assemblage greater than 1 kg. In three years of field work we were able to detect the presence of 95% of the native mammals recorded in this region. We will present the findings of updated species distribution, richness and conservation status of Chacoan mammals, plus an occupancy analysis of 10 species. Mammals are facing a critical situation, efforts to preserve remnants of native forest in Chaco region need to be increased.