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Zooplankton in a Danube River Arm near Rusovce (Slovakia)

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ILLYOVÁ Marta BUKVAYOVÁ Katarína NÉMETHOVÁ Danka

Rok publikování 2008
Druh Článek v odborném periodiku
Časopis / Zdroj Biologia
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Obor Ekologie - společenstva
Klíčová slova river-floodplain habitats; Cladocera; Copepoda; Rotifera
Popis Poor quantity of zooplankton was recorded in the Danube arm situated on the right side of the Danube river in Slovakia (river km 1857) in 2002 and 2003. All over the year the arm is significantly influenced by groundwater by reason of seepage. Because of low mean water temperature and poorly developed macrovegetation in particular, the arm reminds gravel pit-like. The annual average of zooplankton biomass was low and ranged from 0.57 g.m-3 (2002) to 1.48 g.m-3 (2003), because of low crustacean abundance. Total cladoceran abundance was excessively low in both years and ranged from 3.5 N L-1 (2002) to 16.5 N L-1 (2003). Small species, Bosmina longirostris and Chydorus sphaericus were dominant. Only four adult Copepoda - Cyclops vicinus, Thermocyclops crassus, Eurytemora velox and Eudiaptomus gracilis - were recorded in quantitative samples of both years. In the zooplankton assemblage dominated rotifers (Synchaeta pectinata, Synchaeta oblonga, Polyarthra dolichoptera and Keratella cochlearis) which represented 78 and 67 % of total abundance respectively. The total of 19 species of rotifers, 34 Cladocera species and 16 taxa of Copepoda were found.
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