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Keyword: Trout

eDNAtlas Data mapper

Lab Notes Posted on: September 06, 2018
Analyzing eDNA samples in a lab allows researchers to reliably determine where target species are found and overcomes previous limitations of traditional sampling techniques. The eDNAtlas website and dynamic database tools allow the public, managers, and researchers to access results from samples of environmental DNA (eDNA).  

Monitoring the impact of changing climate on western rivers and cold water species

Science Spotlights Posted on: August 31, 2018
Anyone familiar with the Columbia River’s massive salmon die-off a few summers ago might also be concerned about how climate change will affect fish habitats. The 2015 die-off killed more than 250,000 fish and was blamed on record low streamflows and high water temperatures. While coldwater fish such as salmon and trout can adjust to slightly warmer-than-normal temperatures for short periods, abnormally high temperatures for prolonged periods lower oxygen levels, increase the likelihood of deadly diseases, and cause life-threatening physiological stress.

The eDNAtlas project: A national map of aquatic biodiversity

Science Spotlights Posted on: June 07, 2018
The National Genomics Center for Wildlife and Fish Conservation pioneered development of eDNA sampling of aquatic environments at their laboratory in Missoula, MT. The Center has partnered with dozens of National Forests, as well as other state, federal, tribal, and private natural resource organizations to assist in the collection and processing of eDNA samples. Thousands of eDNA samples are collected annually and constitute a rapidly growing biodiversity archive that provides precise information about native and non-native species distributions, temporal trends in those distributions, and the efficacy of species and habitat restoration and conservation efforts. eDNA sampling provides a low-cost & sensitive method for determining which species occur in water bodies. Rapid adoption of eDNA sampling by many natural resource agencies led to an exponential increase in data and the need for an open-access database. The website and open-access database were launched in June 2018 with approximately 6,000 samples and is updated semi-annually with newly processed samples.

Global warming of salmon and trout rivers in the northwestern U.S.: Road to ruin or path through purgatory?

FS News Posted on: May 10, 2018
What will the future hold for western river systems and the cold-water species that depend on them? To answer this question, scientists at the USDA Forest Service Rocky Mountain Research Station compiled temperature records from nearly 400 monitoring sites along large rivers in the northwestern United States.

Fishing for Climate Data: Salmon and Trout Habitat Forecasting

Documents and Media Posted on: May 09, 2018
Scientists at the Rocky Mountain Research Station’s Aquatic Sciences Lab compiled temperature records from more than a dozen natural resource agencies monitoring nearly 400 sites along large rivers in the northwestern United States to understand climate change impacts on salmon and trout river habitat. Document Type: Other Documents

Global warming of salmon and trout rivers in the northwestern U.S.: Road to ruin or path through purgatory?

Publications Posted on: April 23, 2018
Large rivers constitute small portions of drainage networks but provide important migratory habitats and fisheries for salmon and trout when and where temperatures are sufficiently cold. Management and conservation of cold‐water fishes in the current era of rapid climate change requires knowing how riverine thermal environments are evolving and the potential for detrimental biological impacts.

Environmental factors found to control trout hybridization

FS News Posted on: November 10, 2016
Anglers and conservationists can rest easier knowing that scientists have just identified ways to locate and preserve genetically pure westslope cutthroat trout populations into the future. A new study released today provides quantitative estimates of which specific environmental factors, such as stream size and temperature, affect the distribution of cutthroat trout and their hybrids with rainbow trout.

Mapping climate refugia to preserve cold-water biodiversity using crowd-sourced databases

Science Spotlights Posted on: September 20, 2016
Concerns about climate change effects on cold-water biodiversity sparked broad multi-agency collaborative efforts throughout the American West. U.S. Forest Service research teams led development of massive interagency databases that now enable precise mapping of critical habitats and species distributions in streams flowing through 101 National Forests.

Evaluation of potential effects of federal land management alternatives on trends of salmonids and their habitats in the interior Columbia River basin.

Publications Posted on: May 12, 2016
Aquatic species throughout the interior Columbia River basin are at risk. Evaluation of the potential effects of federal land management on aquatic ecosystems across this region is an important but challenging task. Issues include the size and complexity of the systems, uncertainty in important processes and existing states, flexibility and consistency in the analytical framework, and an ability to quantify results.

The range-wide bull trout eDNA project

Projects Posted on: February 04, 2016
The bull trout has a historical range that encompasses many waters across the Northwest. Though once abundant, bull trout have declined in many locations and is now federally listed and protected under the Endangered Species Act. Rocky Mountain Research Station scientists initiated the range-wide bull trout eDNA project in partnership with biologists from more than 20 organizations to create sound and precise information about the distribution of bull trout in thousands of streams across their range.

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