Riparian Forest, Aquatic Habitat, and Vertebrate Influences on Macroinvertebrate Assemblages in Headwater Streams of Northeast Ohio
Creators:Holmes, Kathryn L.
Advisor:Goebel, P. Charles
Contributors:Williams, Lance R.
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Series/Report no.:School of Environment and Natural Resources. Graduate student poster competition, 2007
It is well established that riparian areas and aquatic ecosystems are connected and influence each other (e.g. organic matter inputs and flooding). Studies that examine how multiple taxa are structured by their habitat and interact with each other are lacking for many types of stream systems, especially primary headwaters. As headwater stream restoration increases, increased scientific data is needed to guide sustainable restoration. During the summer of 2004, we conducted a study to examine how environmental factors influence macroinvertebrate assemblages in headwater streams of northeast Ohio across watershed positions. Upstream and downstream 100 m reaches of four perennial headwater streams (1st - 3rd order) in Cuyahoga Valley National Park were sampled for riparian forest habitat, in-stream habitat, macroinvertebrates, fishes, and salamanders. Canonical correspondence analysis indicates 87% of the variation in macroinvertebrate feeding guilds can be explained by riparian and in-stream habitat, and predators. Partial canonical correspondence analysis reveals in-stream habitat explains 37.2 % of the explained variation in macroinvertebrate feeding guilds, while riparian habitat explains 27.9%, and predators explain 23.3 %. Canonical correspondence analysis indicates 76% of the variation in macroinvertebrate families can be explained by the interaction between in-stream habitat and predators explains 25.5 % of the explained variation in macroinvertebrate families.
Salaries and funding were provided by the Ohio Agricultural Research and Development Center (OARDC) SEEDS Program, the Ohio Sea Grant Program, the School of Environment and Natural Resources, The Ohio State University, and the USDI National Park Service.
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