ISSN:
1573-5117
Keywords:
rotifers
;
dominant species
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Rotifers form 71% of the zooplankton of the strongly eutrophic (total N 2 g m−3, total P 53 mg m−3) Võrtsjärv (Estonia). Altogether 150 taxa of rotifers occur. Species characteristic of oligo- and mesotrophic waters have totally disappeared during the last 30 years, or are disappearing now. Species whose numbers and biomass reached 20% or more of total zooplankton were considered dominants. These were Anuraeopsis fissa, Keratella cochlearis, K. quadrata frenzeli, Polyarthra dolichoptera, P. luminosa, Synchaeta verrucosa and Trichocerca rousseleti. The contribution of dominant rotifers to total zooplankton and its biomass is as follows: S. verrucosa 25% and 39%, P.dolichoptera 34% and 25%, K. cochlearis 25% and 7%, K. quadrata frenzeli 9% and 7%, A. fissa 28% and 0.4%, T. rousseleti 20% and 0.6%, respectively.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00025963
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