| Title | Understanding Freshwater Mussel Distribution, Abundance, and Demography in the South Umpqua River Basin, Oregon: Impacts of Land Use and Stream Hydraulics |
| Publication Type | Thesis |
| Year of Publication | 2020 |
| Authors | Johnson, Laura |
| Academic Department | Environmental Studies Program |
| Degree | M.S. |
| Pagination | 61 p. |
| University | University of Oregon |
| City | Eugene, Or. |
| Type of Work | Masters Thesis |
| Call Number | OSU Libraries: Digital Open Access |
| Keywords | agriculture, Anodonta spp., aquatic invertebrates, Asian clam = Corbicula fluminea, bivalves, Cow Creek, depleted species, habitats, human impacts, hydrology, introduced species, land use, logging, molluscs, mussels, South Umpqua River, theses, Western pearlshell = Margaritifera falcata, Western ridged mussel = Gonidea angulate |
| Notes | “This thesis provides baseline information necessary for conservation and management of native mussel populations in the South Umpqua River basin. We documented all three PNW genera within the basin, but only one species (Margaritifera falcata) was widespread. Species richness and mussel abundances werel owest at downstream sites. We found widespread evidence of recent M. falcata reproduction, but the lower South Umpqua River populations are likely non-viable. The percentage of forest cover within the drainage basin area was the best predictor of mussel abundance, and indicates that the cumulative impact of anthropogenic land use may be degrading mussel habitats.” (from the Abstract) The invasive Asian clam may also have contributed to the decline of native mussels. This is a valuable look at an important indicator species. |
| URL | https://scholarsbank.uoregon.edu/xmlui/handle/1794/26175 |
