The King River snakes through some of Tasmania’s most dramatic and diverse landscape, flowing past rainforest, button grass plains and the rugged peaks of the West Coast Range before emptying into a large bay near Strahan, a quiet fishing town. To the casual visitor, the winding stream looks as wild as the lightly settled country around it. But on a February morning, the King’s tea-brown waters flowing past forested banks near the sea were disturbingly silent. The air hummed with large, persistent horseflies and little else. Healthy Tasmanian streams typically teem with aquatic insects, including mayflies, stoneflies and caddisflies, which form the foundation of freshwater food webs. Not here. Along the lower King River, many aquatic species are gone; an enduring effect of copper mining above Queenstown, which sent uncounted tons of mine waste downstream. That pollution originated at Mount Lyell, one of Australia’s largest historic copper mines. Established in the early 1890s, its tailing piles discharged toxic contaminants into the nearby Queen River, a tributary that flows directly into the King. Historic mine workings at Mount Lyell near Queenstown, Tasmania state, Australia, where more than a century of copper mining has left a lasting environmental legacy that continues impacting biodiversity and posing risks to public health. Image by Stefan Lovgren. Although large-scale dumping ended long before the mine was finally closed in 2014, that hidden legacy of pollution remains embedded in river waters, sediments and floodplains. Surveys of aquatic life have repeatedly found that the sensitive species expected in…This article was originally published on Mongabay

From Conservation news via This RSS Feed.