Life Sciences Commons^™

Impacts Of Eutrophication On Benthic Invertebrates & Fish Prey Of Birds In Farmington And Bear River Bays Of Great Salt Lake, Trip Armstrong, Wayne A. Wurtsbaugh

Watershed Sciences Faculty Publications

Farmington Bay’s watershed is primarily in the heavily populated metropolitan Salt Lake City, and consequently, it receives approximately 50% of its inflow from nutrient‐ rich wastewater releases. The high nutrient loads make it eutrophic and reducing the loading has been suggested to reduce blooms of toxic cyanobacteria. However, the bay also supports thousands of wading birds and waterfowl, and there is concern that reducing nutrient inflows might reduce the production of bottom‐dwelling insects and other invertebrates that the birds rely upon.

Effects Of Eutrophication On Birds In Three Bays Of Great Salt Lake: A Comparative Analysis With Utah Dwr Waterbird Survey Data, Wayne A. Wurtsbaugh

Watershed Sciences Faculty Publications

Farmington Bay and Bear River support massive numbers of migratory birds. Because of Farmington Bay’s high nutrient loading and hypereutrophic condition, the Utah DWQ has proposed to list it as impaired under EPA’s and Utah’s 303d criteria. There is concern, however, that changing nutrient loading might influence invertebrate prey of birds, but it is not known if this would be a positive or negative effect. Bear River Bay is far less eutrophic, but has a similar shallow morphometry, and thus presents an ideal comparative opportunity to assess the influence of eutrophication on birds.

From 2007‐2011 the Utah Division of Wildlife …

Management Of The Great Salt Lake Ecosystem: Water, Economic Values And Competing Interests, Wayne A. Wurtsbaugh

Watershed Sciences Faculty Publications

No abstract provided.

Relationships Between Eutrophication, Cyanobacteria Blooms And Avian Botulism Mortalities In The Great Salt Lake, Wayne A. Wurtsbaugh

Watershed Sciences Faculty Publications

Massive bird mortalities due to botulism occur in Farmington and Bear River Bays in the Great Salt Lake. During 2007 we investigated whether there could be a relationship between blooms of the toxic cyanobacteria, Nodularia spumengia and botulism outbreaks in Northern Shoveler ducks and other birds. Our limnological analyses indicated that Farmington Bay was hypereutrophic, with chlorophyll concentrations reaching more than 100 μg/L on most dates in the summer. The extreme eutrophication led to nighttime anoxia, even in sites as shallow as 30 cm. In 2007 cyanotoxin (nodularin) concentrations were moderately high (> 20 μg/L) in May and June, but …

Extreme Eutrophication And Cyanotoxin Levels In Farmington Bay, A Polluted Embayment Of The Great Salt Lake, Utah, Wayne A. Wurtsbaugh, Amy M. Marcarelli, Gregory Boyer

Watershed Sciences Faculty Publications

The Great Salt Lake of Utah is surrounded on its eastern and southern shores by 1.4 million people, with projections of 5 million by 2050. Agricultural, industrial and particularly secondary-treated domestic wastes from this population flow primarily into Farmington Bay, a 280 km2 shallow "estuary" with a mean depth near 0.5 m. Fish are rare but bird use is extensive and massive mortalities of waterfowl and shorebirds have occurred in the bay. Phosphorus loading rates of >2 g m-2yr-1 cause hypereutrophic conditions: Secchi depths are usually 0.6 mg/L, mean Chl. a is 179 ug/L and the combined trophic state index …

Nutrient Loading And Eutrophication In The Great Salt Lake, Wayne A. Wurtsbaugh

Watershed Sciences Faculty Publications

No abstract provided.

Eutrophication In Farmington Bay And Its Potential Impacts On Wildlife, Wayne A. Wurtsbaugh

Watershed Sciences Faculty Publications

No abstract provided.

Eutrophication In Farmington Bay, Great Salt Lake, Utah 2005 Annual Report, Wayne A. Wurtsbaugh, Amy M. Marcarelli

Watershed Sciences Faculty Publications

No abstract provided.