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PL
W 2016 roku dokonano oceny składu gatunkowego oraz struktury dominacji mięczaków rzeki Muchawki (lewobrzeżny dopływ Liwca). Odnotowano występowanie 19 gatunków mięczaków, a w tym 11 gatunków ślimaków i 8 gatunków małży. Eudominantem był małż Pisidium casertanum, który występując tylko na dwóch stanowiskach stanowił 43,1% wszystkich mięczaków. Eudominantami były także dwa inne gatunki małży z rodziny Sphaeriidae – Pisidium subtruncatum (22,8%) i Sphaerium corneum (10,3%). Ślimaki najliczniej reprezentował dominant Bithynia tentaculata, stanowiąc 5,4% wszystkich mięczaków oraz subdominant Bathyomphalus contortus – 2,8%. Po szesnastu latach od pierwszej analizy malakologicznej stwierdzono w rzece Muchawka wzrost bogactwa gatunkowego oraz różnice w dominacji mięczaków. Niezmiennie dominowały małże z rodziny Sphaeriidae, ale przy innym składzie gatunkowym. Odnotowano zanik chronionej Anodonta cygnea i Sphaerium rivicola, a pojawienie się również chronionej Unio crassus.
EN
In 2016, the species composition and the structure of the dominance of molluscs in the Muchawka River (left-bank tributary of the Liwiec River) were assessed. The occurrence of 19 species of molluscs were recorded, including 11 species of snails and 8 species of mussels. The eudominant was Pisidium casertanum, which, only in the last two sites, constituted 43.1% of all molluscs. Two other species of molluscs from the Sphaeriidae family were also eudominants – Pisidium subtruncatum (22.8%) and Sphaerium corneum (10.3%). Snails were most frequently represented by the dominant Bithynia tentaculata, constituting 5.4% of all molluscs, and the subdominant Bathyomphalus contortus at 2.8%. Sixteen years after the first malacological analysis, an increase in species richness and differences in the dominance of molluscs were found in the Muchawka River. Clams from the Sphaeriidae family invariably dominated but with a different species composition. The disappearance of the protected Anodonta cygnea and Sphaerium rivicola has been noted, and the occurrence of the protected Unio crassus has also been noted.
EN
The paper presents the river valley physiography and the selected hydraulic, physics and chemical parameters of the upper section of small lowland river – Pichna Szadkowicka (the Warta river catchment, Central Poland). The strong relationship between the river and river valley habitat’s characteristics and the plant species and vegetation diversity was noted. Around one hundred (93) of vascular plant species was noted in total, including Listera ovata (strictly protected) and partially protected: Hedera helix, Viburnum opulus, Frangula alnus and Hepatica nobilis. The high natural (botanical) and landscape values of the researched section of the Pichna Szadkowicka river with adjacent parts of Wojsławice forest complex justify additionally their protection in the network of forests reference plots and of the High Conservation Value Forests (HCFV).
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