Distribution and phenology of large branchiopods in Austria
Reprinted
from Hydrobiologia
359: 13-22 (1997), with kind permission from Kluwer
Academic Publishers
Erich Eder, Walter
Hödl & Renate Gottwald
Abstract
In
Austria, the distribution of Anostraca, Notostraca, and Conchostraca
is mainly confined to the flood plains of the rivers Morava and Danube,
and the shallow alkaline pans of the Seewinkel region in Burgenland
province. Occasionally, large branchiopods can also be found in rain
pools of the eastern and central Austrian lowlands, where topography
and climate favour the existence of astatic water bodies. Differences
in hydrology, temperature and water chemistry requirements may be
reflected in local species compositions and species seasonal appearance.
A survey conducted from 1994 through 1996 found that Chirocephalus
shadini, Eubranchipus grubii, and Lepidurus apus
occurred in late winter and spring, while Branchinecta ferox,
Branchinecta orientalis, Cyzicus tetracerus and Chirocephalus
carnuntanus were found exclusively in spring. Streptocephalus
torvicornis, Tanymastix stagnalis, and Eoleptestheria
ticinensis were present in spring and summer. Branchipus schaefferi
was found in summer and fall, whereas Imnadia yeyetta, Leptestheria
dahalacensis, Limnadia lenticularis, and Triops cancriformis
occurred throughout spring, summer and fall. Streptocephalus torvicornis
was documented for Austria for the first time since 1965.
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