Fish, Forests, & Toxics
Lake Superior seems pure, cold, lovely, wild, and vast: a wilderness. Yet it’s under threat. Water levels have been dropping, water temperatures have been rising, and development has been fragmenting forests, draining wetlands, and cutting estuaries off from the lake.
Exotic species, particularly zebra mussels and sea lamprey, continue to wreak massive changes in food webs and entire ecosystems, and asian carp seem poised to invade the lake. Persistent organic pollutants (POPs) remain, even though many of them were banned decades ago, while new synthetic endocrine-disrupting chemicals make their way into the lake.