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Abstract

The study site has historically been used for industrial operations, but is now the location of the Roanoke/Cashie River Center, a science museum. Wetland restoration was initiated as part of the science center development. Concern that previous industrial uses would impact the development of the wetlands prompted evaluations. Sediments were examined for the presence of macroinvertebrates, analyzed for physical characteristics, and evaluated in toxicity tests. Duplicate samples were collected from the large and small wetlands. Initial examination of sediment indicated few indigenous organisms. Macroinvertebrate recruitment into the wetlands was evaluated using benthic colonization samplers. After four weeks, samplers were retrieved and analyzed. There were significantly more organisms (number of species and number of individuals) found in recruitment samplers than in indigenous populations. Sediments were also tested in ten-day toxicity tests with the amphipod Hyalella azteca. Survival was reduced in sediments from both wetlands for samples collected in November and February. It does appear that there is contamination associated with sediments that is inhibiting the development of sediment organism populations

Year: 2011
OAI identifier: oai:CiteSeerX.psu:10.1.1.198.952
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