A 1700-foot stretch of the West Branch of the Octoraro Creek, Lancaster County, PA was restored using the Rosgen method in an effort to remediate the flow regime during high flow events, extend the riparian corridor and improve the fisheries below the state game lands. Water physical/chemical as well as biological data were collected using the BACI method (Before/After, Control/Impact). Using a Hess sampler, macroinvertebrates were collected within riffle and pool habitats from the above, impact and below impact sites on the West Branch as well as from a control site on the East Branch of the Octoraro Creek. Preliminary results indicate that Collector-filterers (Hydropsychidae) and collector-gatherers (Elmidae, Baetidae and Ephemerellidae) were the dominant functional feeding groups in riffles from both streams. Collector-gatherers (Chironomidae) were dominant in most pools.
Keywords: Rosgen method, functional feeding groups
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