Abstract
The materials of water mites collected in 1973–1974 in aquatic environments of three nature reserves in Roztocze were characterized. The collections comprised 995 Hydrachnidia belonging to 49 species. Twenty-eight species were collected in the Nad Tanwią Reserve, 30 species – in the Czartowe Pole Reserve, and 24 species – in the Szum Reserve. The analyzed reserves cover short river sections, therefore, the evaluated fauna can be regarded as relatively rich. The fauna of the examined reserves included widely distributed species as well as species typical of montane and submontane areas. In the analyzed reserves, the water mite fauna was dominated by rheobionts and rheophiles, and it was characteristic of upland rivers in the Lublin Region. One species new to Poland was identified: Atractides albaruthenicus Cich. et Bies. A comparison of the water mite fauna from the Nad Tanwią Reserve with the materials collected in 2001–2002 points to a significant reduction in the number of water mite species and considerable changes in the structure of synecological groups.
Highlights
S Water mites (Hydrachnidia) in the aquatic ecosystems of Roztocze and the SandomierzLowland were studied in 1973–1974
This paper analyzes the remaining collections of water mites collected in the rivers and streams of three forest and landscape reserves in Roztocze: Nad Tanwią (Tanew River), Czartowe Pole (Sopot River) and Szum (Szum River)
Water mites colonizing springs had been described in an earlier study [5], and those indings were used in this study as a source of information about the species composition and abundance of water mites in nature reserves
Summary
S Water mites (Hydrachnidia) in the aquatic ecosystems of Roztocze and the Sandomierz. Lowland (south-eastern Poland) were studied in 1973–1974. Rich as well as ecologically and regionally diversiied fauna of water mites was found. C caught (11 new for the fauna of Poland), 85 species in streams and rivers Characteristic in water mite fauna of the studies area is the signiicant contribution of mountain species, especially Carpathian ones in streams and rivers as well as postglacial relicts in springs and astatic waters. This paper analyzes the remaining collections of water mites collected in the rivers and streams of three forest and landscape reserves in Roztocze: Nad Tanwią (Tanew River), Czartowe Pole (Sopot River) and Szum (Szum River)
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