Land Use Effects on Aquatic Ecosystems
Land Use Effects on Aquatic Ecosystems
Landuse has a dominant influence on aquatic ecosystems due to its influence on the hydrologic cycle, water quality, stream habitat, aquatic species, and ultimately the overall function of the aquatic ecosystem. The USGS WSC is involved in the monitoring and research of landuse and how landuse activities influence aquatic ecosystems. This includes the influence of forest, urbanization, and agricultural systems. Much of this work is focused on determining the interactions of physical or chemical stressors and how they influence aquatic ecosystems. The influence of landuse on aquatic ecosystems can be done through assessing changes in species composition, fish heath, bioaccumulation of contaminants, alterations of habitat, excessive production of nuisance aquatic plants, or alterations in the ability of an aquatic ecosystem to function normally.
Filter Total Items: 26
Osoyoos Ice Jam
The Issue: Ice jams can occur at the outlet of Osoyoos Lake on the border of Canada and the United States, resulting in a decrease or complete interruption in streamflow on the Okanogan River. These ice jams appear to be occurring at a greater frequency than they have in the past and interruptions in streamflow can hinder the passage of anadromous fish and impact downstream water rights and water...
Stormwater Action Monitoring (SAM)
The issue: Stormwater runoff often carries pollutants that degrade water quality in receiving waters. A regional-scale monitoring program is necessary to objectively measure and track progress in reducing stormwater impacts on environmental health. How USGS will help: Scientists from the U.S. Geological Survey (USGS) are monitoring water quality and watershed health for urban and urbanizing areas...
Baseline assessment of PAH concentrations in fish from the Stillaguamish River, Washington
The Issue: Polycyclic aromatic hydrocarbons (PAHs) are a class of oil-derived compounds widely distributed in fresh and marine waters. They pose a significant toxicity risk to fish. It can be challenging to pinpoint the source of PAHs found in wild fish populations. PAHs are widespread and come from many sources, so it is hard to determine whether fish exposure is event-related or consistent with...
Puget Sound, WA Nutrient SPARROW Model
The Issue: Puget Sound watershed nutrient loads are known to have an impact on marine water quality along with wastewater treatment plants discharging to Puget Sound. To effectively reduce and control nutrient loads to the Sound, the Washington State Department of Ecology needs a regional watershed model that fits within their Puget Sound Nutrient Source Reduction Project’s management framework...
Water Temperature Mapping in the Snoqualmie and Skykomish River Basins
The Skykomish, Snoqualmie, and Middle Fork Snoqualmie River Basins have historically provided critical spawning, rearing, and core habitat for several salmonid species.
Central Columbia Plateau - Yakima River Basin
The issue: Agriculture and irrigation are major forces in Central Washington. Intensive land and water management practices may lead to water quality issues. In the Central Columbia Plateau and Yakima River Basin (CCYK), water quality issues include high nutrient loading resulting in eutrophication, elevated concentrations of water-soluble pesticides, and elevated concentrations of organochlorine...
Puget Sound Basin NAWQA
The Puget Sound Basin (PUGT) study unit of the National Water Quality Assessment (NAWQA) program encompasses a 13,700-square-mile area that drains to Puget Sound and adjacent marine waters. Included in this region are all or part of 13 counties in western Washington, as well as the headwaters of the Skagit River and part of the Nooksack River in British Columbia, Canada. The Puget Sound Basin...
Stillaguamish Emerging Contaminants
Emerging contaminants are a group of chemical compounds that generally include pharmaceuticals, personal-care products, surfactants, industrial and household chemicals, and food additives. Their presence in the environment is typically associated with discharges from wastewater treatment-plants (WWTP), on-site septic systems, and some animal production operations. They are of particular interest...
National Parks North Coast and Cascades Network Critical Loads
Nutrients such as nitrogen are essential for plant and animal growth and nourishment, but overabundance can cause adverse effects. Excess amounts of nitrogen from the atmosphere can cause a lake to go through eutrophication, the process in which excess nitrogen triggers a series of events that cause a lake to become fatally low in dissolved oxygen. Alpine lakes are especially sensitive to excess...
Regional Stormwater Monitoring Program Sampling
The Issue: The State of Washington issues Municipal Stormwater Permits to local governments in the Puget Sound region that require them to develop and implement a stormwater management program that reduces the discharge of pollutants and protects the quality of water in rivers, streams, lakes and Puget Sound. The permitees in partnership with the State need to measure whether water quality and...
Coal Transport
The Issue: Federal and state natural resource managers and Tribes are concerned with the environmental impacts from unintentional release of coal dust from train cars during transport through the Northwest. Proposed new coal export terminals in Washington and Oregon would substantially increase rail traffic through the Northwest and the release of coal dust to the environment. How USGS will help...
Recharge and frozen ground in the PNW
The Issue: Seasonally frozen ground occurs over approximately one-third of the contiguous United States, and the extent and duration of frozen ground have been decreasing as a result of global warming. In semi-arid regions such as the Columbia Plateau and Snake River Plain in the Pacific Northwest, nearly all natural recharge occurs between October and March when intermittent or seasonal frozen...