N. A. Yevdokimova and M. V. Yermokhinb
aVavilov State Agrarian University, ul. Sovetskaya 60, Saratov, 410600 Russia
bTchernischevsky State University, ul. Astrakhanskaya 83, Saratov, 410026 Russia
Received April 13, 2007
Abstract—The zooplankton of ephemeral waterbodies of Saratov oblast is represented by 68 species of crusta-
ceans: 9 fairy shrimps, 25 cladocerans, 10 calanoids, and 24 cyclopoids. Regional and local patterns of high spe-
cies diversity in the zooplankton of ephemeral waterbodies are discussed. The specificity of crustacean species
composition in ephemeral waterbodies of intrazonal forest-steppe landscapes of the valley river basin of the Don
River and of the steppes and desert steppes of Zavolzhye is shown. The number of crustacean species in the zoop-
lankton increases from the northwest to southeast in all ephemeral waterbodies of forest-steppe (33 species),
steppe (39), and desert steppe (52) zones. The impact of irrigation systems on the formation of zooplankton species
composition in ephemeral waterbodies was established.
DOI:10.1134/S199508290901009X
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