Introduction of Exotic Species

The intentional introduction of exotic (nonresident) species has become an almost common practice in some fisheries to increase the production of commercially important species. The introduction of Nile perch into Lake Victoria is a primary example. However, the intentional or unintentional (or sometimes illegal) introduction of exotic species can cause very serious problems in a given lake. The accidental introduction of zebra mussels in Lake Erie and water hyacinths in several lakes of China provides a dramatic example of this phenomenon. The introduction of exotic species can provoke very dramatic changes in the ecosystem structure not only at the biological community level, but also in a lake's chemical-physical environment. The major negative consequences of exotic species include the (1) disappearance of native species; (2) alteration of trophic equilibrium; (3) significant reduction in species diversity; and (4) reduction of water transparency and changes in algae bloom patterns, via chemical-physical feedback processes in a lake.

10 Ways To Fight Off Cancer

10 Ways To Fight Off Cancer

Learning About 10 Ways Fight Off Cancer Can Have Amazing Benefits For Your Life The Best Tips On How To Keep This Killer At Bay Discovering that you or a loved one has cancer can be utterly terrifying. All the same, once you comprehend the causes of cancer and learn how to reverse those causes, you or your loved one may have more than a fighting chance of beating out cancer.

Get My Free Ebook


Post a comment