ABSTRACT
In 1976, scientists monitoring North Carolina’s Belews Lake were perplexed by the sudden disappearance of the young-of-the-year age class of popular game sh species. This man-made reservoir was fed in part by water from a coal ash settling basin. By 1977, only 3 of the lake’s 29 resident species remained. The
3.1 Introduction ......................................................................................................7 3.2 What Is Selenium (Se)? .....................................................................................9 3.3 Sources of Se Entering Aquatic Environments .............................................. 12
3.3.1 Future Sources of Se ........................................................................... 16 3.3.2 Selected Se Problem Sites ................................................................... 16
3.4 Selenium Cycling and Bioaccumulation in Aquatic Ecosystems ................... 18 3.4.1 Selenium Speciation in Water, Particulates, and Biota ...................... 18 3.4.2 Selenium Uptake and Transfer in Aquatic Food Webs .......................20 3.4.3 Food-Web Exposure and Toxicity Risks .............................................22
