Forest and Rangeland Ecosystem Science Center (FRESC)

Aquatic

Filter Total Items: 10
Date published: November 14, 2017
Status: Active

Wildlife-Habitat Relationships

Whether generalists or specialists, wildlife species use habitats based on their structural, compositional, and climatic characteristics. This use may vary with life stage, age, or physiological condition of the animal, as well as weather, season, food availability, need for cover or shelter, and other factors. Our research focuses on understanding the intrinsic and extrinsic factors that...

Contacts: David S Pilliod
Date published: November 14, 2017
Status: Active

Water Temperature in Rivers and Streams

Increases in summer stream temperature as a result of human impacts and climate change may exceed the thermal tolerances of aquatic biota that are adapted to colder environments and climates. The combined effects of humans and climate change are of global concern across the range of coldwater aquatic organisms.

Date published: November 13, 2017
Status: Active

Spatial Ecology of Freshwater Ecosystems

Water resources, riparian areas, and aquatic organisms are of critical importance in natural resource management. Yet, they are difficult to map, monitor, and understand in a spatially explicit and extensive manner as can be done more easily in terrestrial environments.

Date published: November 13, 2017
Status: Active

Restoration and Management of Aquatic Ecosystems

Restoration of aquatic ecosystems involves a broad spectrum of active and passive efforts. Passive efforts rely on natural recovery of ecosystems, such as land use practices that protect riparian zones and sources of wood and sediment that drive the geomorphic and associated biological functions in streams. Active efforts involve more direct intervention, usually applied to specific locations...

Contacts: Jason B Dunham
Date published: November 13, 2017
Status: Active

Oregon Spotted Frog

The Oregon spotted frog (Rana pretiosa) is a medium-sized anuran native to the northwestern United States. Body coloration ranges from brown or olive to brick red, usually overlaid with dark, ragged spots. Oregon spotted frogs can be distinguished from other native species by their relatively short hind legs, orange or red wash of color on underside of abdomen and legs, and upturned chartreuse...

Contacts: Michael J Adams
Date published: November 13, 2017
Status: Active

Mercury Cycling and Effects on Ecological Communities

Mercury contamination is a serious issue that impacts both ecosystem and human health on a global scale. In its organic (methylmercury) form, mercury is highly bioaccumulative and is among the most toxic compounds commonly found in the environment. Mercury is a relatively distinctive contaminant in the sense that the risk of deleterious environmental effects is more strongly related to...

Date published: November 13, 2017
Status: Active

Managing Aquatic Habitats and Communities

The Pacific Northwest includes a patchwork of public lands managed by numerous state and federal agencies. Our research informs and supports these agencies as they manage for resident amphibian species, including pre- and post-treatment assessment, decision support, long-term monitoring, population translocation, and habitat restoration.

Contacts: Michael J Adams
Date published: November 6, 2017
Status: Active

Contaminant Bioaccumulation through Food Webs

This is a broad theme representing the largest component of the Contaminant Ecology Research Program, acting as a bridge between the “Habitat and Land Use Influences” and “Ecological Effects” themes. “Contaminant Bioaccumulation” focuses on quantifying the transfer or movement of contaminants through food webs, and identifying the primary landscape factors and ecological mechanisms that are...

Date published: October 14, 2017
Status: Active

Life Histories of Aquatic Species

Many species exhibit diverse behaviors that translate into different patterns of habitat use and demography. Diversity within species can be related to a complex array of processes, including genetic and maternal influences, and external environmental drivers. Our work addresses life history diversity in salmon and trout, including Pacific salmon, steelhead and rainbow trout, cutthroat trout,...

Contacts: Jason B Dunham
Date published: October 12, 2017
Status: Active

Landscape Ecology of Aquatic Ecosystems

Landscape ecology has only a short history as a recognized discipline, but it has transformed our thinking about the interplay between pattern and process. We now understand that many smaller-scale phenomena are driven by spatial processes, such as the proximity of different habitats to one another, the ability of organisms to move through landscapes, and the dynamics of natural disturbance...

Contacts: Jason B Dunham