Original scientific paper
Differences in submerged and emergent eulittoral sediment biota of Lake Sakadaš (Kopački Rit Nature Park, Croatia)
I. Bogut
J. Vidaković
Abstract
Sediment granulometry, organic matter and moisture content in sediment were measured in an attempt to assess their importance for the structure of sediment biota (bacteria, protozoa, and especially, meiofauna) in the period between February and December 1998 at three eulittoral sites (submerged, at the land-water interface and emergent) of Lake Sakadaš in the Kopački rit Nature Park, Croatia.
Ten groups of meiofauna were recorded in total: Nematoda, Copepoda (incl. nauplii), Rotatoria, Oligochaeta, Gastrotricha, Cladocera, Tardigrada, Turbellaria, Acari and Insecta larvae. The relatively high number of meiofauna groups with a low abundance was the consequence of the physical and chemical characteristics of the study area, primarily of the sandy structure of sediment. Nematodes were the dominant group of meiofauna at all study sites.
At the submerged site a significant correlation existed between the organic matter in the sediment and the water level of Lake Sakadaš, between the organic matter and the moisture content in the sediment, and between the number of total bacteria and protozoa. At the land-water interface a significant correlation existed between the sediment moisture content and the total meiofauna and nematode abundance. At the same site, as well as at the emergent site, a correlation existed between the protozoa and meiofauna and between the protozoa and nematode abundances.
Keywords
bacteria; protozoa; meiofauna; eulittoral; lake
Hrčak ID:
11677
URI
Publication date:
30.6.2002.
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