Odonata; population biology; mark-recapture method; sludge sedimentation pond; mine subsidence pools.

Since 1999 the intensive survey of chosen bioindicative taxa has been caring out at the anthropogenic origin localities in Karviná region (NE Silesia, Czech Republic, Europe). Odonatological research carried out on anthropogenic wetlands in the Karviná region has shown that coal sludge sedimentation ponds, mine subsidence pools and secondary wetlands can serve as important stabilizing ecological elements in a highly disturbed environment. We recorded 49 species of the dragonflies on anthropogenic wetlands in the researched region. Certain species of rare dragonflies whose occurrence is unique in the Czech Republic may be linked to the researched bodies of water. Specific ecological conditions in mining areas provide very good opportunities for the study of individual species? tolerance towards different factors of the environment.

Since 1999 the intensive survey of chosen bioindicative taxa has been caring out at the anthropogenic origin localities in Karviná region (NE Silesia, Czech Republic, Europe). Odonatological research carried out on anthropogenic wetlands in the Karviná region has shown that coal sludge sedimentation ponds, mine subsidence pools and secondary wetlands can serve as important stabilizing ecological elements in a highly disturbed environment. We recorded 49 species of the dragonflies on anthropogenic wetlands in the researched region. Certain species of rare dragonflies whose occurrence is unique in the Czech Republic may be linked to the researched bodies of water. Specific ecological conditions in mining areas provide very good opportunities for the study of individual species? tolerance towards different factors of the environment.