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Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources; they are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. Ecore...

Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources; they are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. Ecor...

Droughts in the Pacific Northwest (PNW) of the United States are causing tree mortality and increasing tree die off from wildfire and biological disturbance agents (BDAs, i.e., pests and pathogens) but the disturbance-climate relationships are not well understood (Agne et al. 201...

Droughts in the Pacific Northwest (PNW) of the United States are causing tree mortality and increasing tree die off from wildfire and biological disturbance agents (BDAs, i.e., pests and pathogens) but the disturbance-climate relationships are not well understood (Agne et al. 201...

Level III ecoregions of Montana have been refined and subdivided in a manner consistent with ecoregion work that has been completed or is on-going for roughly 80% of the conterminous United States. The project was collaborative, involving the scientists and resource managers from...

Taxa richness patterns are useful for evaluating areas of greatest conservation concern. To 30 determine those patterns, we analyzed fish and macroinvertebrate taxa richness data obtained 31 at 3475 unique stream and river sites collected by the USEPA&rsquo;s National Rivers and ...

Researchers have defined ecological regions of the United States based on patterns in the coincidence of terrestrial, aquatic, abiotic and biotic characteristics that are associated with spatial differences in ecosystems. Ecoregions potentially facilitate regional research, monit...

Riparian ecosystems are important elements in landscapes that often provide a disproportionate range of ecosystem services and conservation benefits. Their protection and restoration have been one of the top environmental management priorities across the US over the last several...

The continuing expansion of anthropogenic influence across the continental United States has motivated the establishment of nutrient criteria for streams, lakes, and estuaries as a means to promote the protection of aquatic resources. Nutrient criteria have been established based...

Level III ecoregions of Utah were refined and subdivided in a manner consistent with ecoregion work that has been completed or is on-going for roughly 80% of the conterminous United States. The project was collaborative, involving the scientists and resource managers from the Nat...

Like Icarus, the world's oceans are &quot;flying too close&quot; to the sun. Increases in temperature and sea level and reductions in pH will affect many, if not most, near-coastal species. The type and severity of the effects will vary both by species and regionally due to geogr...

Like Icarus, the world&rsquo;s ecological resources are &ldquo;flying too close&rdquo; to the sun, and climate change will impact near-coastal species through temperature, sea-level rise, and ocean acidification and indirectly through changes in invasive species and land-use patt...

Ecological regions are areas of similar climate, landform, soil, potential natural vegetation, hydrology, or other ecologically relevant variables. The makeup of aquatic biological assemblages (e.g., fish, macroinvertebrates, algae, riparian birds, etc.) varies dramatically over ...

In the late 1990s the Environmental Monitoring and Assessment Program of the U.S. Environmental Protection Agency developed a structured set of tests to evaluate and facilitate selection of metrics for indices of biotic integrity (IBIs). These IBIs were designed to be applicable ...

The USEPA's Environmental Monitoring and Assessment Program conducted a five year probability sample of permanent mapped streams in 12 western US states. The study design enables us to determine the extent of selected riparian invasive plants, alien aquatic vertebrates, and some ...

The aquatic ecosystem simulation model AQUATOX was parameterized and applied to Contentnea Creek in the coastal plain of North Carolina to determine the response of fish to moderate levels of physical and chemical habitat alterations. Biomass of four fish groups was most sensiti...

The sink of CO2 and the carbon budget of forest biomes of the former Soviet Union (FSU) were assess with two distinct approaches: 1) ecosystem/ecoregional, and 2) forest statistical data. he ecosystem/ ecoregional approach was based on the integration of ecoregions (defined with ...

Nitrogen (N) leakage to the environment in the United States costs an estimated $210 billion per year, equivalent to 1-3% of the national GDP, in part due to atmospheric N pollution. Excess N deteriorates ecosystems via eutrophication in water bodies, causing fish kills and addi...

Ecological research within the US Environmental Protection Agency's Office of Research and Development has recently changed its focus to quantifying and mapping ecosystem services provided to humans. Our local research group has been charged to develop a regional assessment of se...

Landscape features (e.g., land use) influence water quality characteristics on a variety of spatial scales. For example, while land use is controlled by anthropogenic features at a local scale, geologic features are set at larger spatial, and longer temporal scales. Individual ...

Introduced species can produce a variety of impacts on native assemblages and ecosystems. Reliable knowledge about the extent of non-native species should be a useful tool for effective management of fisheries and aquatic ecosystems. It is well known that many non-native fish s...

Research on early warning indicators has generally focused on assessing temporal transitions with limited application of these methods to detecting spatial regimes. Traditional spatial boundary detection procedures that result in ecoregion maps are typically based on ecological ...

Aquatic invaders are a major threat to ecological integrity and biodiversity of marine, estuarine, and freshwater ecosystems around the world. These invaders have been successful in passing through four discrete phases in their invasion of a new environment: (1) transport, (2) ...

The objective of the proposed study is to assess the responsiveness of indicators of ecosystem function to three intensities of watershed disturbance in four regions. An integrated assessment of abiotic and biotic condition of streams will be conducted to assess streams affected...

The products of this research include tools, monitoring data and assessments. Tools include biological indicators and a process for setting expectation or reference conditions against which to evaluate the indicators. It will also include a prioritized set of indicators on anthr...