CONICET | Buscador de Institutos y Recursos Humanos

The wetlands are freshwater systems of great importance in arid and semiarid areas. They are responsible for numerous ecological functions and harbor a great biodiversity. However, currently suffer major impacts. In this work we analyze space-temporary fluctuation of the diversity, richness, abundance and dominance of an assemblage of birds in a wetland. We sampled during six months in seven different environmental during the 2008. The method used was of transects and fixed point. We record 68 species and 2019 individuals. The Simpson diversity index (0,91 and 0,93) and richness (38 and 31) are higher in "Pajaro Bobo" and "Espejo de Agua" but the dominance (0,004 and 0,003) is lower. September is the month with more richness and less dominance. Julio is the month less diverse. Nine species are very common of being observed. There are significant differences between environmental (X2= 1678,3; Gl= 6; p <0.0000001; n=36) and among the months (X2=139,5; GL; 5; p <0.0000001; N=36) in relation to the abundance. According to the Morisita index the environmental of "P疔aro Bobo" and "Totoral" have a greater similarity (0.77) as in the months of June and Julio (0.89). This work is the first contribution to understanding of the dynamics of wetland in the arid and semiarid system of Monte.

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