The Ecological Problems of Introduction and Reintroduction of Sturgeons

The intensive growth of humanity in the last 100 years has resulted in a series of ecological problems concerned with dramatic changes in and the pollution of, the environment. As a consequence of these, we see the destruction of different life systems, such as populations, communities, and ecosystems. In recent times, many developed countries are trying to restore natural land-based and water ecosystems, which are in different degrees of destruction. These operations require integrated scientific investigations of the abiotic and biotic factors for determining the conditions of living organisms. The principal aim of this work is to recover, as far as possible, the lost biodiversity in ecosystems that have been destroyed.

Scientists use the introduction and reintroduction of species as the main way of solving these problems. The first is when the destruction of a particular ecosystem leads to the total or partial extinction of aboriginal species, some of which may be endemic. In this case, theoretically, we can select related (interconnected) species which have the same mode of lifeas the vanished species. If we cannot find such a one, a new community can be created according to the environmental conditions. Sometimes, the introduction is connected with specious purposes, to improve the biodiversity and/or increase the productivity of the ecosystems. Such activities can lead to negative results and even to disaster.