Freshwater Systems

Managing the world’s freshwater ecosystems including lakes, rivers, and springs, and the water they supply to meet environmental and societal needs in a changing climate is one of the biggest challenges for the 21st century.

Alaska is simultaneously a landscape of extremes requiring specialized adaptations by plants and animals to survive the winters and a landscape of abundance that supports breeding birds each summer from as far away as Africa. Terrestrial Alaska also supports iconic species such as caribou and muskoxen whose population dynamics, predator/prey relationships and habitat ecology are researched by USGS...

The shoreline, beaches, and infrastructure in Duluth, Minnesota have been degraded along the Minnesota Point barrier island because of high water levels and heavy wave action. The U.S. Army Corps of Engineers (USACE) is exploring the beneficial use of dredge material for beach nourishment on the Lake Superior side of the barrier island.

Eastern Ecological Science Center research ecologists are working with state and local partners to develop multiple biological assessments of non-tidal stream and river conditions in the Chesapeake Bay watershed.

Reconnection of floodplains to their rivers has been considered a fundamentally beneficial ecological practice.

Nutrient Cycling in Aquatic Ecosystems Nutrients lost from agricultural areas in watersheds of the Great Lakes cause harmful algal blooms and hypoxia in some areas of the Great Lakes. Substantial efforts are being made in these watersheds to reduce the amount of nutrients entering the streams and rivers; however, additional work is needed to further reduce nutrient loads to meet international...

The team's long term goal is: Examine the causes, fates, exposures, biological accumulation, and adverse effects (including sublethal effects) of environmental contaminants on animal (largely bird) populations.

The Great Lakes Water Quality Agreement designated 31 Areas of Concern (AOCs) across the Great Lakes. The AOCs are geographical areas where significant beneficial use impairment has occurred as a result of human activities. A beneficial use impairment (BUI) relates to a change in the chemical, physical, or biological integrity of the Great Lakes system sufficient to cause any of the 14 conditions...

The Great Lakes Water Quality Agreement, in addition to designating 31 Areas of Concern (AOCs) across the Great Lakes, also identified contaminants of emerging (CECs) and mutual concern (CMCs) that warranted additional work not only at AOCs but elsewhere within the Great Lakes Basin.

The sandbars exposed along the shoreline of the Colorado River represent only a small fraction of the sand deposits in Grand Canyon, most of which are on the bed of the river in eddies and the channel. Current management practice includes efforts to maintain and build sandbars by releasing high flows from Glen Canyon Dam that are timed to coincide with periods of fine-sediment supply from...

This project centers on assimilation of data, interpretation of results, updating quantitative models, and providing policy-neutral, high-quality information to the agencies and stakeholders in the Missouri River Basin.

Northern Prairie Wildlife Research Center has conducted multiple research efforts related to developing methodology for quantifying the environmental and societal services provided by prairie-pothole wetland ecosystems. In this effort, we are exploring the feasibility of applying methodologies similar to those developed wetland ecosystems within the Prairie Pothole Region to other landscapes where...