Occurrence of Unio Crassus (Bivalvia, Unionidae) Depending on Water Chemistry in the Foreland of the Polish Carpathians
نویسندگان
چکیده
Thick shelled river mussel Unio crassus (included in IUCN Red Data List) is a benthic, filter-feeding animal very susceptible to any changes of water chemistry. In this paper we report on the new sites of this species in the Małopolska region – an area of strong anthropogenic pressure. Physical and chemical parameters have been compared between 8 rivers inhabited and not inhabited by the mussel. Results indicate that despite economic development of the region, it retains clear rivers; however, subtle differences in water chemistry can influence the occurrence of this endangered species.
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