|
|
|
|||||
|
|
|
|
Leech (Hirudinea)
communities of post-exploitation water bodies in industrial region (Upper
Silesia, Poland) |
|
|
Mariola
KRODKIEWSKA |
|
|
University of Silesia, Department of Hydrobiology,
Bankowa 9, 40-007 Katowice, mkrodkie@us.edu.pl |
|
|
Abstract: The
investigations were carried out in post-exploitation water bodies (subsidence
pools, sand- and gravel pits) situated in urbanised and over-industrialised
region of Upper Silesia. The least diversified leech (Hirudinea) communities
occurred in subsidence pools, because of the very high concentration of
chlorides, sulphates and phosphates in their water, which is moreover very
hard and of high BOD5 value. In other kinds of studied water
bodies greater leech species diversity was observed. Most of the species found in studied water bodies
occur commonly in various freshwater habitats, what may point out the lack of
peculiarity of leech communities in these unnatural conditions. |
|
|
Key words:
leech community, post-exploitation water bodies |