depression pools - phenomena in the land of Tesin Silesia region

The character of the Tesin region is a result of thousand year of human activity, influencing and changing its single elements. Industry development in last two centuries, especially high mining activity following by the relief formation influenced the Tesinsko region destiny. Besides, there is natural biota destruction. Suitable biota decline and continual number of endangered fauna and flora species are infallible warning signals that refer to growing strain of environment. On the other hand it is necessary to emphasize that a lot of species of organisms pushed away from their natural spots find their new place just in the most mine work affected area. The subsidence depression present the most extensive change of the relief. High level of ground water causes flooded dropped basins, that are settled with community of flora and fauna. Thus subsidence depression - common feature of mining region are created. (author)