Land Use, Spatial Scale, and Stream Systems: Lessons from an Agricultural Region |
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| Authors: | Bruce Vondracek Kristen L Blann Carson B Cox Julia Frost Nerbonne Karen G Mumford Brian A Nerbonne Laurie A Sovell Julie K H Zimmerman |
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| Institution: | (1) U. S. Geological Survey Minnesota Cooperative Fish and Wildlife Research Unit, University of Minnesota, 1980 Folwell Avenue, St. Paul, MN 55108, USA;(2) Kristen L. Blann, PO Box 959, Brainerd, Minnesota 56443, USA;(3) Sustainable Conservation, 121 Second Street, San Francisco, CA 94105, USA;(4) Higher Education Consortium for Urban Affairs, 2233 University Ave West, Suite 210, St. Paul, MN 55114, USA;(5) Rollins School of Public Health, Emory University, 1518 Clifton Road NE, Atlanta, GA 30307, USA;(6) Minnesota Department of Natural Resources, Metro Region Fisheries, 1200 Warner RoadSt. Paul, MN 55106, USA;(7) Minnesota Pollution Control AgencyDivision of Environmental Outcomes, Rivers and Streams Monitoring Unit, 520 Lafayette Road N., St. Paul, MN 55155, USA;(8) Minnesota Cooperative Fish and Wildlife Research UnitDepartment of Fisheries, Wildlife, and Conservation Biology, University of Minnesota, 1980 Folwell Avenue, St. Paul, MN 55108, USA |
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| Abstract: | We synthesized nine studies that examined the influence of land use at different spatial scales in structuring biotic assemblages
and stream channel characteristics in southeastern Minnesota streams. Recent studies have disagreed about the relative importance
of catchment versus local characteristics in explaining variation in fish assemblages. Our synthesis indicates that both riparian-
and catchment-scale land use explained significant variation in water quality, channel morphology, and fish distribution and
density. Fish and macroinvertebrate assemblages can be positively affected by increasing the extent of perennial riparian
and upland vegetation. Our synthesis is robust; more than 425 stream reaches were examined in an area that includes a portion
of three ecoregions. Fishes ranged from coldwater to warmwater adapted. We suggest that efforts to rehabilitate stream system
form and function over the long term should focus on increasing perennial vegetation in both riparian areas and uplands and
on managing vegetation in large, contiguous blocks.
Minnesota Cooperative Fish and Wildlife Research Unit is jointly sponsered by U.S. Geological Survey Biological Resources
Division, the University of Minnesota, The Minnesota Department of Natural Resources, and the Wildlife Management Institute. |
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| Keywords: | Water quality Habitat Riparian buffers Fish Macroinvertebrates |
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