Threats To the Lake Fish Communities of the U.K. Arising From Eutrophication and Species Introductions

Abstract

Eutrophication and species introductions are recognized as two of the major threats to lake fish communities in many parts of the world. Examples of the direct and indirect ways in which eutrophication threatens salmonid, coregonid, percid and cyprinid populations of U.K. lakes are briefly reviewed. In addition, the threats posed by the introduction of new species to these relatively species-poor communities are also illustrated and discussed by reference to several case histories.