CESIMAR - CENPAT   25625
CENTRO PARA EL ESTUDIO DE SISTEMAS MARINOS
Unidad Ejecutora - UE
artículos
Título:
RICHNESS, ENDEMISM AND CONSERVATION OF SIGMODONTINE RODENTS IN ARGENTINA
Autor/es:
ANAHÍ FORMOSO AND PABLO TETA
Revista:
Mastozoología Neotropical
Editorial:
SAREM
Referencias:
Lugar: Mendoza; Año: 2019 vol. 26 p. 99 - 116
ISSN:
1666-0536
Resumen:
Sigmodontine rodents, with 86 genera and ~430 living species, constitute one of the most successfulradiations of Neotropical mammals. In this contribution, we studied the distributional ranges of 108 sigmodontinespecies in Argentina. Our objectives were (i) to establish geographical patterns of species richness and endemism,and (ii) to evaluate the regional conservation status of these taxa. We constructed a minimum convex polygonfor each species, using information from literature and biological collections. Individual maps were superimposedon a map of Argentina divided into cells of 25 km on each side. For each cell, we calculated the species richness, which varied between 1 and 21 species, and its degree of endemism, which fluctuated between 0.001 and3.28. There were 30 species of sigmodontine rodents distributed almost exclusively in Argentina, most of themrestricted to forested areas (Southern Andean Yungas) or to arid and semiarid environments (High and LowMonte and Patagonian Steppe). Areas with high species richness and endemism scores corresponded grosslywith the Southern Andean Yungas, the Humid Chaco plus the Paraná flooded savannas, the Alto Parana Atlanticforests plus the Araucaria moist forests, the High Monte and the ecotone between the Patagonian steppe andthe Valdivian temperate forests. A reassessment of the conservation status of sigmodontine rodents distributedin Argentina retrieved 2 extinct species, 7 endangered, 7 vulnerable, 6 near threatened and 13 data deficient.These numbers suggest a much more serious situation than the expressed by previous evaluations, highlightingthe urgent need to establish conservation measures for the protection of this group