ECOLOGICAL RESEARCH ON AVIFAUNA OF RESERVOIRS IN THE MIDDLE OF ARGES VALLEY. THE AUTUMNAL SEASON
MARIA DENISA CONETE University of Piteşti, Faculty of Sciences, Physical Education and Informatics, Department of Natural Sciences, 1, Târgul din Vale, 110040, Piteşti, Romania,
e-mail: denisa_conete@yahoo.com
In this paper, we present the results of our ecological research on the avifauna of reservoirs from the middle basin of the ArgeÅŸ River, during the autumnal season. The autumnal season has been relatively rich in species (147 species belonging to 14 orders, 39 families and 91 genera); 57 species are dependent on wetlands. We also perform an analysis of the avifauna according to ecological indices. The Anseriformes were overdominant. During the autumnal season, as well as during the serotinal and the prevernal ones, according to the dominance and the Dzuba index of ecologic significance, 5 species were characteristic: Anas platyrhynchos, Aythya ferina, Fulica atra, Phalacrocorax carbo ÅŸi Larus ridibundus. During this season, we can observe evident autumnal agglomerations that are specific to migration, which continues the migration started during the serotinal season. The attractiveness of the five reservoirs for the fauna is different and dynamic, thus registering ample migrations from a reservoir to another. Researched lakes represent, for the migratory aquatic birds, important locations for resting and feeding during their cross over from the nesting areas towards the wintering shelters.
