In places like Colorado and parts of Canada this benign diatom has changed for the worst. Why, it is not yet known–environmental changes in the water (warmer, pH changes, more or different agricultural runoff?) or a spreading genetic mutation that is changing the behavior and growth patterns for this phytoplanktonic creature. But it bodes ill for riverine aquatic insect habitat, and from that, for trout and other fish and the aquatic food web in general. Take a good look at Rock Snot. One at …

Rock Snot: Coming to a Clear, Cold Stream Near You? Read more »