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Volume 3, issue 1
Web Ecol., 3, 12–19, 2002
https://doi.org/10.5194/we-3-12-2002
© Author(s) 2002. This work is distributed under
the Creative Commons Attribution 3.0 License.
Web Ecol., 3, 12–19, 2002
https://doi.org/10.5194/we-3-12-2002
© Author(s) 2002. This work is distributed under
the Creative Commons Attribution 3.0 License.

  01 Feb 2002

01 Feb 2002

Trophic structure of the benthic invertebrate community in the littoral zone of a mountain cascade system

M. Prus, P. Bijok, and T. Prus M. Prus et al.
  • International Centre of Ecology, Polish Academy of Sciences, Dziekanów Leśny near Warsaw, 05092 Łomianki, Poland

Abstract. The cascade of Solina/Myczkowce dam reservoirs situated in the West Carpathian Mts was investigated. The cascade consists of two reservoirs, the upper one built 35 yr ago on the San and Solinka Rivers of 2100 ha area separated from another one, of 190 ha area, with hypolimnion cold water supplied from the upper one.

The offshore zone was investigated monthly (6 sites of upper, 3 sites of lower reservoir) using a tube bottom sampler. Besides numbers, biomass and biodiversity indices, the proportion of predators, plant/detritus-feeders and filter-feeders was assessed.

In upper reservoir Solina, with a lack of filter-feeders, a clear preponderance of plant-detritus feeders was observed. Predators, consisting mostly of leeches and hydranchnellids were present. In lower reservoir Myczkowce, all three trophic classes were present in the first year of study in almost equal proportions and in 1998 with slight preponderance of plant/detritus feeders was observed.

The Oligochaeta/Chironomidae index in both reservoirs was low, indicating low degree of eutrophication. Only one site in Solina reservoir (near a fish culture) and one in Myczkowce (influenced by tourist activity) showed a high value of this index.

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