State Water Resources Research Institute Program

Project Id: 2010CO219B
Title: Shear Resistance of the Nuisance Diatom Didymosphenia Geminata
Project Type: Research
Start Date: 3/01/2010
End Date: 2/28/2011
Congressional District: 4th
Focus Categories: Ecology
Keywords: Didymosphenia, nuisance geminata
Principal Investigator: McKnight, Diane Marie
Federal Funds: $ 5,000
Non-Federal Matching Funds: $ 2,928
Abstract: Didymosphenia Geminata is a nuisance diatom species that can form large amounts of stalk material that covers the streambed (Larnard et al. 2006). These blooms impact the aesthetic value and biodiversity of mountain streams across many parts of North America particularly the Rocky Mountain states. In recent years there has been an increase in nuisance blooms, as well as spreading to new watersheds (Spaulding and Elwell 2007). D. geminata tends to prefer regulated flow conditions downstream of reservoirs (Kirkwood et al. 2009). Studies in Boulder Creek, CO (Cullis 2009; Miller et al. 2009) and elsewhere (Kilroy et al. 2005; Kirkwood et al. 2007) have shown that elevated shear stress and bed disturbance are important in controlling growth.

Progress/Completion Report, 2010, PDF

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