| http://www.w3.org/ns/prov#value | - ???Stoneflies are extremely sensitive to changes in water quality and are therefore among the first organisms to disappear from degraded rivers and streams; they play a significant role in many aquatic ecosystems, decomposing leaves and other organic material and forming the base of the aquatic food chain,??? the groups said in a release. ???Fly fishers have long recognized the important role ston
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