During these late winter days, researchers who are studying the rusty discoloration of northern Alaska streams are prepping for summer field trips. Jon O’Donnell of the National Park Service is one of ...

Streams with ample connections to shallow groundwater flow-paths have greater microbial diversity and are more effective at preventing toxic forms of metals -- often products of upstream mining -- ...

A tiny, vibrant world thrives along the rocky bottom of most streams. As sunlight filters through the water, mayfly nymphs, no larger than your fingernail, cling to algae-coated cobbles. Six spindly ...