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Study: Crayfish may help restore dirty streams

Source
United Press International (UPI)

Publication Date
2016-04-21

AVONDALE, Pa., April 21 (UPI) -- A pair of researchers were trying to measure the effects of crayfish in small stream ecosystems. During their experiments, they happened upon a surprising result -- one that suggests the presence of crayfish is beneficial to a stream's health.

Content
http://www.upi.com/Science_News/2016/04/21/Study-Crayfish-may-help-restore-dirty-streams/7301461251985/?spt=sec&or=sn