Description

Of the 12 sampled locations, the 6 nonbuffered sites appear to be affected by agricultural chemical exposure. Agricultural chemical exposure to these sites include runoff from corn and soybean row crops and discharges from concentrated animal feeding operations. Our data suggest that these outside land practices have a negative effect on macroinvertebrate diversity and abundance. Use of vegetative buffers to filter surface runoff can reduce pollutant inputs and improve macroinvertebrate biodiversity at wetland sites. Outside literature supports the institution of vegetative buffers as a method to protect water resources and macroinvertebrate populations Davis and Bidwell 2008, Muscutt et al. 1993, Osborne and Kovacic 1993, USDA 1991. Evaluation of pesticide exposure is ongoing but preliminary results further support the benefits of vegetative buffers. The finalized study report will provide land and program managers with the information they need to develop water quality improvement strategies for select WPAs. Study results are also valuable for the development of Integrated Pest Management Plans and Pesticide Use Proposals.

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