Fauna bentosowa i epifityczna brzuchorzęsków (Gastrotricha) w litoralu jeziora mezotroficznego

The species composition and dominance structure of Gastrotricha living in bottom sediments and on plants: Myriophyllum sp., Ceratophyllum sp.and Elodea canadensis Michx. were studied in the littoral of the mesotrophic Lake Piaseczno from 1994 to 1996. A total of 31 Gastrotricha species altogether (22 species in bottom sediment and 20 species living on plants) were found in the habitats under study. In the benthic community there were three eudominant species (dominance >10.0%): Chaetonotus heteracanthus Remane, Ch. macrochaetus Zelinka and Heterolepidoderma gracile Remane, at: 13.3%, 15.1% and 17.1% respectively. In the epiphytic community, two species were eudominants: Heterolepidoderma macrops Kisielewski and Lepidodermella squamata Dujardin, at 27.9% and 32.4%, respectively. The Gastrotricha fauna in the bottom sediments was characterised by a more even structure of dominance, which was reflected in greater biodiversity (H'=2.58 compared to H'=2.01 for the community living on aquatic plants). Only 11 species were common to both habitats, with similarity of the two communities being as low as 17% (coefficient of homogeneity).

Bibliogr. p. 5

Abstarct in Polish. Taxa in Latin.

Streszcz. pol. Nazwy taksonów również łac.

Bibliogr. s. 5

6 s. ; 25 cm

6 p. ; 25 cm