Author:Nel, JL; Roux, DJ; Abell, R; Ashton, PJ; Cowling, RM; Higgins, JV; Thieme, M; Viers, JHDate:Jun 2009Freshwater ecosystems and their associated biota are among the most endangered in the world. This, combined with escalating human pressure on water resources, demands that urgent measures be taken to conserve freshwater ecosystems and the ...Read more