The effect of decreasing water level in the Caspian Sea to the species composition, trophic and biotopic relationships of the Anatidae family in the wintering period

Abstract : In 2013-2023, in the Azerbaijani sector of the South-Western coast of the Caspian Sea, the effect of the lowering of the water level in the Caspian Sea to the species composition, trophic and biotopic relationships of the Anatidae family was studied during the winter period. In the Azerbaijani sector of the South-Western part of the Caspian Sea, 32 migratory-wintering species of the Anatidae family are distributed. Of these, 8 species (Cygnus olor, Tadorna ferruginea, Tadorna tadorna, Anas crecca, Anas platyrhynchos, Mareca strepera, Spatula querquedula, Netta rufina) have very little number sedentary populations. One species - Anser fabalis, is a newly introduced species to the Azerbaijan fauna (2020). 10 species (Cygnus olor, Cygnus bewickii, Branta ruficollis, Anser erythropus, Marmaronetta angustirostris, Aythya ferina, Aythya nyroca, Clangula hyemalis, Melanitta fusca, Oxyura leucocephala) from the Anatidae family are included to the 3rd edition of the "Red Book" of the Republic of Azerbaijan (2023). The migratory-wintering species come to the research area from Russia, Northern Kazakhstan and Northern European countries. The natural and anthropogenic factors occured by the lowering of the water level in the Caspian Sea cause to the changes of the species composition, trophic and biotopic behavior of the migratory-wintering bird populations on the South-Western coast of the Caspian Sea.
Keyword : Trophic, wintering, biotopical, water level, bay
Author(s) : Taghiyev, A. N.
Downloads : 7
Published Issue : 2024 Vol. 19 Number 2


2024 Vol. 19 Number 2