| Abstract: | The relative influence of physical, chemical, and biotic wetland characteristics on wetland use by spring migrating lesser scaup (Aythya affinis [Eyton]; hereafter "scaup") is not well understood. We compared characteristics of used and unused wetlands in eastern South Dakota. Used wetlands were larger (>2 ha; P = 0.05), with higher amphipod densities (>500 individuals m-2; P = 0.01) and higher chlorophyll-a concentrations (>0.2; P < 0.05). These wetlands had lower ionic conductivity (1.8 mS; P = 0.02), lower nitrates (1.0 ppm; P = 0.01), lower submerged aquatic vegetation density (P < 0.01), and lower fine sediment proportions (???150 ??m grain size; P < 0.01). Wetland use was best described by amphipod and submerged aquatic vegetation densities. The predictive model explained 50.4% of the variation in scaup use in a reserve dataset. Thresholds of tolerance by amphipods in relation to wetland habitats in the upper Midwest should be investigated further as indicators of a broader range of water and habitat quality characteristics for scaup. ?? 2009 Copyright by the Center for Great Ploins Studies, University of Nebraska-Lincoln. |
| Genre: | Article |
| ProdID: | 70036849 |
| Citation Author: | Kahara, S. N.; Chipps, S. R. |
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| Citation End Page: | 167 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Great Plains Research |
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| Citation Number Of Pages: | 11 |
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| Citation Search Results Text: | Predicting lesser scaup wetland use during spring migration in eastern South Dakota; 2009; Article; Journal; Great Plains Research; Kahara, S. N.; Chipps, S. R. |
| Citation Start Page: | 157 |
| Citation Volume: | 19 |
| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | Predicting lesser scaup wetland use during spring migration in eastern South Dakota; 2009; Article; Journal; Great Plains Research; Kahara, S. N.; Chipps, S. R. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 2009 00:00 -0600 |
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