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Jason B Dunham

My research is focused on landscape ecology of aquatic ecosystems, conservation biology of focal species, ecology of natural disturbance, biological invasions, and monitoring.

Education and Certifications

  • Ph.D. Ecology Evolution and Conservation Biology, University of Nevada, Reno, NV

Science and Products

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three scientists preparing to conduct an underwater biological survey

Aquatic & Landscape Ecology Research Team (FRESC)

Fresh waters are one of the most valuable and threatened resources worldwide. They supply critical services to society and harbor many of the world’s most imperiled species. We conduct research and provide technical assistance to address challenges to fresh waters. Our research focuses on ecological processes in freshwater and terrestrial systems and the effects of those processes on landscape...
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Forest and Rangeland Ecosystem Science Center
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Aquatic & Landscape Ecology Research Team (FRESC)

Fresh waters are one of the most valuable and threatened resources worldwide. They supply critical services to society and harbor many of the world’s most imperiled species. We conduct research and provide technical assistance to address challenges to fresh waters. Our research focuses on ecological processes in freshwater and terrestrial systems and the effects of those processes on landscape...
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Filter Total Items: 16
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Elwha River flowing through former Aldwell reservoir

USGS science supporting the Elwha River Restoration Project

The Elwha River Restoration Project has reconnected the water, salmon, and sediment of a pristine river and coast of the Olympic Peninsula of Washington. Coordinated by the National Park Service, restoration of the Elwha River included the removal of two large dams that had blocked salmon and sediment passage for almost 100 years. The largest dam removal in U.S. history began in September 2011 and...
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Ecosystems, Natural Hazards, Coastal and Marine Hazards and Resources Program, Fisheries Program, Pacific Coastal and Marine Science Center
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USGS science supporting the Elwha River Restoration Project

The Elwha River Restoration Project has reconnected the water, salmon, and sediment of a pristine river and coast of the Olympic Peninsula of Washington. Coordinated by the National Park Service, restoration of the Elwha River included the removal of two large dams that had blocked salmon and sediment passage for almost 100 years. The largest dam removal in U.S. history began in September 2011 and...
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Image: Pacific Lamprey (Lampetra tridentata)

Controls on Habitat for Native Lampreys in the Umpqua River Basin

Native lampreys are culturally significant fishes for tribal communities in Oregon. As such, the USGS has begun working with the Cow Creek Band of Umpqua Tribe of Indians to study changes that may be affecting habitat for native Pacific and western brook lampreys in the Umpqua River basin.
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Oregon Water Science Center
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Controls on Habitat for Native Lampreys in the Umpqua River Basin

Native lampreys are culturally significant fishes for tribal communities in Oregon. As such, the USGS has begun working with the Cow Creek Band of Umpqua Tribe of Indians to study changes that may be affecting habitat for native Pacific and western brook lampreys in the Umpqua River basin.
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siletz channel

Controls on Salmon and Lamprey Habitat along the Siletz River

Chinook Salmon and Pacific Lamprey are culturally significant fishes to the Tribal community along the Siletz River, Oregon. The USGS has begun studying how streamflow and bedload conditions may influence mainstem spawning habitats.
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Oregon Water Science Center
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Controls on Salmon and Lamprey Habitat along the Siletz River

Chinook Salmon and Pacific Lamprey are culturally significant fishes to the Tribal community along the Siletz River, Oregon. The USGS has begun studying how streamflow and bedload conditions may influence mainstem spawning habitats.
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Section of Prospect Creek where stream has no flow

Probability of Streamflow Permanence (PROSPER)

PRObability of Streamflow PERmanence (PROSPER) Rivers and streams are constantly changing. Streamflows can change throughout the year and between years due to snowmelt, precipitation, diversions, and return flows. For many streams, these fluctuations determine whether a stream has year-round flow or not. PROSPER is a project initiated to better understand what causes these fluctuations in...
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Groundwater and Streamflow Information Program, Forest and Rangeland Ecosystem Science Center, Idaho Water Science Center, Washington Water Science Center, Wyoming-Montana Water Science Center
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Probability of Streamflow Permanence (PROSPER)

PRObability of Streamflow PERmanence (PROSPER) Rivers and streams are constantly changing. Streamflows can change throughout the year and between years due to snowmelt, precipitation, diversions, and return flows. For many streams, these fluctuations determine whether a stream has year-round flow or not. PROSPER is a project initiated to better understand what causes these fluctuations in...
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USGS science for a changing world

Threat of Invasives to Native Species and Ecosystems

Invasive species are a growing threat to native species and ecosystem processes in fresh waters. The Introducing non-native fish into an area may have no effect, little current effect, or the potential to seriously impact the native species, possibly resulting in their extinction. We conduct research to address the causes of invasions and their impacts. We also provide technical support for...
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Ecosystems, Wildlife Program, Forest and Rangeland Ecosystem Science Center
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Threat of Invasives to Native Species and Ecosystems

Invasive species are a growing threat to native species and ecosystem processes in fresh waters. The Introducing non-native fish into an area may have no effect, little current effect, or the potential to seriously impact the native species, possibly resulting in their extinction. We conduct research to address the causes of invasions and their impacts. We also provide technical support for...
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USGS science for a changing world

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, to...
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Forest and Rangeland Ecosystem Science Center
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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, to...
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USGS science for a changing world

Climate and Aquatic Ecosystems

Effects of changing climate on aquatic ecosystems requires understanding a complex series of interactions between terrestrial climates, their corresponding impacts on hydrological processes, and ultimately a suite of biological responses. These uncertainties stand in contrast to the urgent need for reliable information to be used in developing long-term strategies for climate adaptation to...
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Forest and Rangeland Ecosystem Science Center
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Climate and Aquatic Ecosystems

Effects of changing climate on aquatic ecosystems requires understanding a complex series of interactions between terrestrial climates, their corresponding impacts on hydrological processes, and ultimately a suite of biological responses. These uncertainties stand in contrast to the urgent need for reliable information to be used in developing long-term strategies for climate adaptation to...
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USGS

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, and...
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Forest and Rangeland Ecosystem Science Center
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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, and...
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Colorado River in drought

Webinar: Understanding Water Availability Across Landscapes in a Time of Increasing Drought

View this webinar to learn about a new initiative to address knowledge gaps in water availability at the landscape scale.
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Climate Adaptation Science Center
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Webinar: Understanding Water Availability Across Landscapes in a Time of Increasing Drought

View this webinar to learn about a new initiative to address knowledge gaps in water availability at the landscape scale.
Learn More
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USGS science for a changing world logo

Identifying Resilient Headwater Streams to Mitigate Impacts of Future Drought in the Northwest

Streams are classified as perennial (flowing uninterrupted, year-round) or intermittent (flowing part of the year) or ephemeral (flowing only during rainfall events). The classifications of “streamflow permanence” were primarily established in the middle 20th century and are often outdated and inaccurate today if they were not adjusted for changes in land use, wildfires, or climate.Understanding w...
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Climate Adaptation Science Centers, Climate Adaptation Science Center
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Identifying Resilient Headwater Streams to Mitigate Impacts of Future Drought in the Northwest

Streams are classified as perennial (flowing uninterrupted, year-round) or intermittent (flowing part of the year) or ephemeral (flowing only during rainfall events). The classifications of “streamflow permanence” were primarily established in the middle 20th century and are often outdated and inaccurate today if they were not adjusted for changes in land use, wildfires, or climate.Understanding w...
Learn More
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USGS science for a changing world logo

Identifying Resilient Headwater Streams to Mitigate Impacts of Future Drought in the Northwest

Streams are classified as perennial (flowing uninterrupted, year-round) or intermittent (flowing part of the year) or ephemeral (flowing only during rainfall events). The classifications of “streamflow permanence” were primarily established in the middle 20th century and are often outdated and inaccurate today if they were not adjusted for changes in land use, wildfires, or climate.Understanding w...
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Climate Adaptation Science Centers, Climate Adaptation Science Center
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Identifying Resilient Headwater Streams to Mitigate Impacts of Future Drought in the Northwest

Streams are classified as perennial (flowing uninterrupted, year-round) or intermittent (flowing part of the year) or ephemeral (flowing only during rainfall events). The classifications of “streamflow permanence” were primarily established in the middle 20th century and are often outdated and inaccurate today if they were not adjusted for changes in land use, wildfires, or climate.Understanding w...
Learn More
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Image: School of Westslope Cutthroat and Bull Trout

Webinar: Rangewide Climate Vulnerability Assessment for Threatened Bull Trout

View this webinar to learn more about threatened bull trout.
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Northwest Climate Science Center, Climate Adaptation Science Center
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Webinar: Rangewide Climate Vulnerability Assessment for Threatened Bull Trout

View this webinar to learn more about threatened bull trout.
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If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

Stream Temperature in the Lahontan Basin of Nevada and California, 2017-2019

This dataset includes hourly stream temperature data for 139 temperature logger sites throughout the Lahontan Basin Region of Northern Nevada and Eastern California. Data loggers were part a study beginning in 2017, with data available through 2019 for most locations. The spatial data layer contains site locations, geographic information, data summaries, mean August stream temperatures, and modele
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Forest and Rangeland Ecosystem Science Center

Fishes of the Harney Basin revisited: A contemporary assessment of the distribution of fish fauna throughout the Harney Basin from 1990 to 2019

We compiled electrofishing and habitat data sampled from 1990 to 2019 in the Harney Basin by the US Geological Survey (USGS), Oregon Department of Fish and Wildlife (ODFW) and the High Desert Partnership (HDP) to describe native and non-native fish distributions and their habitat associations. USGS collected eDNA data in 2019 to refine the known distributions of common carp (Cyprinus carpio). Site
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Forest and Rangeland Ecosystem Science Center

Stream Temperature and Water Presence Models of Willow/Whitehorse and Willow/Rock Watersheds, Oregon and Nevada

This data release contains spatial stream network (SSN) objects and R scripts to run SSN models to predict mean monthly stream temperature between May and August and water presence on May 15, June 15, July 15, and August 15 in the Willow/Whitehorse watershed during 2015, 2016, and 2017 and the Willow/Rock watershed during 2016 and 2017. Functions referenced within the script may accessed in the SS
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Washington Water Science Center

FLOwPER Database: StreamFLOw PERmanence field observations, August 2019 - October 2019

IMPORTANT NOTE: More recent versions of these data release are available at this link. This dataset includes spatial locations where streamflow permanence observations (continuous flow, discontinuous flow, and dry) were recorded using the FLOwPER (FLOw PERmanence) field survey available in the Survey 123 and S1 mobile application. Additional information to describe the field conditions are includ
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Washington Water Science Center

Stream Temperature in the Northern Great Basin region of Southeastern Oregon, 2016-2019

This dataset includes hourly stream and air temperature data from 124 sites throughout the Northern Great Basin region of SE Oregon. Data loggers were deployed June through September of 2016 and downloaded each subsequent summer through 2019. The spatial data layer contains site locations, geographic information, data summaries, mean August stream temperatures, and modeled NorWest stream temperatu
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Forest and Rangeland Ecosystem Science Center

Geomorphic and larval lamprey surveys in tributaries of the Umpqua River, Oregon

Interactions between geomorphic processes at multiple scales shape the distributions of habitats, species, and life stages that a river can support. Understanding these hierarchical processes may be helpful for proactive monitoring and restoration of native Western Brook Lamprey (Lampetra richardsoni) and Pacific Lamprey (Entosphenus tridentatus) in Pacific Northwest rivers. The processes creating
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Oregon Water Science Center

Stream temperature and drying data from Willow/Whitehorse watersheds, southeast Oregon, 2014-16, and Willow/Rock/Frazer watersheds, northern Nevada, 2015-2016

These tabular, spatial, and code data sets were created in support of a stream temperature and drying study that took place in the Willow and Whitehorse watersheds of southeastern Oregon from 2014-2016 and the Willow, Rock, and Frazer watersheds of northern Nevada from 2015-2016. A prior data release of stream temperature data and associated spatial data from the Willow and Whitehorse watersheds o
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Forest and Rangeland Ecosystem Science Center

Stream temperature data from Willow-Whitehorse and Little Blitzen watersheds, southeast Oregon, 2011-2015

This dataset includes stream temperatures from two data loggers installed at one site in the Little Blitzen River of SE Oregon as part of a redband trout (Oncorhynchus mykiss gairdnerii) study. The site was used as an undisturbed reference in comparison with similar temperature monitoring sites in the Willow-Whitehorse watershed that experienced a 2012 fire that burned nearly the entire watershed.
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Climate Adaptation Science Centers, Climate Adaptation Science Center

If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

USGS
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If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

Filter Total Items: 111

A riverscape approach reveals downstream propagation of stream thermal responses to riparian thinning at multiple scales

Hydrological connectivity in river networks influences their response to environmental changes as local effects may extend downstream via flowing water. For example, localized changes in riparian forest conditions can affect stream temperatures, and these effects may propagate downstream. However, studies evaluating stream temperature responses to riparian forest management have not considered cum
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Ecosystems, Forest and Rangeland Ecosystem Science Center

Beyond streamflow: Call for a national data repository of streamflow presence for streams and rivers in the United States

Observations of the presence or absence of surface water in streams are useful for characterizing streamflow permanence, which includes the frequency, duration, and spatial extent of surface flow in streams and rivers. Such data are particularly valuable for headwater streams, which comprise the vast majority of channel length in stream networks, are often non-perennial, and are frequently the mos
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Water Resources, Washington Water Science Center

Shade, light, and stream temperature responses to riparian thinning in second-growth redwood forests of northern California

Resource managers in the Pacific Northwest (USA) actively thin second-growth forests to accelerate the development of late-successional conditions and seek to expand these restoration thinning treatments into riparian zones. Riparian forest thinning, however, may impact stream temperatures–a key water quality parameter often regulated to protect stream habitat and aquatic organisms. To better unde
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Ecosystems, Forest and Rangeland Ecosystem Science Center

Evaluating coexistence of fish species with coastal cutthroat trout in low order streams of western Oregon and Washington, USA

When multiple species of fish coexist there are a host of potential ways through which they may interact, yet there is often a strong focus on studies of single species without considering these interactions. For example, many studies of forestry–stream interactions in the Pacific Northwest have focused solely on the most prevalent species: Coastal cutthroat trout. To examine the potential for int
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Ecosystems, Forest and Rangeland Ecosystem Science Center

Great expectations: Deconstructing the process pathways underlying beaver-related restoration

Beaver-related restoration is a process-based strategy that seeks to address wide-ranging ecological objectives by reestablishing dam building in degraded stream systems. Although the beaver-related restoration has broad appeal, especially in water-limited systems, its effectiveness is not yet well documented. In this article, we present a process-expectation framework that links beaver-related re
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Ecosystems, Forest and Rangeland Ecosystem Science Center

Assessing contributions of cold-water refuges to reproductive migration corridor conditions for adult salmon and steelhead trout in the Columbia River, USA

Diadromous fish populations face multiple challenges along their migratory routes. These challenges include suboptimal water quality, harvest, and barriers to longitudinal and lateral connectivity. Interactions among factors influencing migration success make it challenging to assess management options for improving migratory fish conditions along riverine migration corridors. We describe a spatia
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Ecosystems, Forest and Rangeland Ecosystem Science Center

Nowhere to hide: The importance of instream cover for stream‐living Coastal Cutthroat Trout during seasonal low flow

Through their multiple functions, refuges may be important for stream‐living fishes, particularly during stressful events such as seasonal low flow or drought. Coastal Cutthroat Trout Oncorhynchus clarkii clarkii is an ideal study organism to understand the importance of refuge. During seasonal low flow, lower water levels limit access to refuge and emigration, survival of fish is low, and predati
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Ecosystems, Forest and Rangeland Ecosystem Science Center

River network and reach‐scale controls on habitat for lamprey larvae in the Umpqua River Basin, Oregon

This study developed a spatially explicit framework to support the conservation of Western Brook Lamprey Lampetra richardsoni and Pacific Lamprey Entosphenus tridentatus in the Umpqua River basin, Oregon. This framework identified locations within the river network likely to support “potential burrowing habitat” for lamprey larvae based on geomorphic conditions and evaluated the overlap of potenti
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Water Resources, Oregon Water Science Center

Unfamiliar territory: Emerging themes for ecological drought research and management

Novel forms of drought are emerging globally, due to climate change, shifting teleconnection patterns, expanding human water use, and a history of human influence on the environment that increases the probability of transformational ecological impacts. These costly ecological impacts cascade to human communities, and understanding this changing drought landscape is one of today’s grand challenges.
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Ecosystems, Water Resources, Climate Adaptation Science Centers, Climate Adaptation Science Center, Forest and Rangeland Ecosystem Science Center, Southwest Biological Science Center, Lower Mississippi-Gulf Water Science Center

Beyond sticks and stones: Integrating physical and ecological conditions into watershed restoration assessments using a food web modeling approach

Watershed assessments have become common for prioritizing restoration in river networks. These assessments primarily focus on geomorphic conditions of rivers but less frequently incorporate non-geomorphic abiotic factors such as water chemistry and temperature, and biotic factors such as the structure of food webs. Using a dynamic food web model that integrates physical and ecological environmenta
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Ecosystems, Forest and Rangeland Ecosystem Science Center

FLOwPER user guide—For collection of FLOw PERmanence field observations

The accurate mapping of streams and their streamflow conditions in terms of presence or absence of surface water is important to both understanding physical, chemical, and biological processes in streams and to managing land, water, and ecological resources. This document describes a field form, FLOwPER (FLOw PERmanence), available within a mobile application (app), for standardized data collectio
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Water Resources, Washington Water Science Center

Linkages between temperature, macroinvertebrates, and young-of-year Coho Salmon growth in surface-water and groundwater streams

Ecological resources for fishes in stream food webs shift over space and time, providing a complex template of available resources that can be used for growth. We tracked water temperature in conjunction with young-of-year Coho Salmon size, growth, and diet in 2 streams with contrasting thermal regimes: a groundwater stream with colder temperatures and lower thermal variability all year and a surf
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Ecosystems, Forest and Rangeland Ecosystem Science Center

Pre-USGS Publications

Rosenberger, A.E., Dunham, J.B., 2005, Validation of abundance estimates from mark-recapture and removal techniques for rainbow trout captured by electrofishing in small streams: North American Journal of Fisheries Management, v. 25, p. 1395-1410.
Dunham, J.B., Pilliod, D.S., Young, M., 2004, Assessing the Consequences of Nonnative Trout in Headwater Ecosystems in Western North America: Fisheries, v. 29, no. 6, p. 18-26, https://doi.org/http://dx.doi.org/10.1577/1548-8446(2004)29[18:ATCONT]2.0.CO;2.
Meeuwig, M.H., Dunham, J.B., Hayes, J.P., Vinyard, G.L., 2004, Effects of constant and cyclical thermal regimes on growth and feeding of juvenile cutthroat trout of variable sizes: Ecology of Freshwater Fish, v. 13, p. 208-216.
Poole, G.C., Dunham, J.B., Keenan, D.M., Sauter, S.T., McCullough, D.A., Mebane, C., Lockwood, J.C., Essig, D.A., Hicks, M.P., Sturdevant, D.J., Materna, E.J., Spalding, M., Risley, J., Deppman, M., 2004, The case for regime-based water quality standards: BioScience, v. 54, no. 2, p. 155-161.
Peterson, J., Dunham, J.B., 2003, Combining inferences from models of capture efficiency, detectability, and suitable habitat to classify landscapes for conservation of threatened bull trout: Conservation Biology, v. 17, no. 4, p. 1070-1077.
Dunham, J.B., Schroeter, R., Rieman, B.E., 2003, Influence of maximum water temperature on occurence of Lahotan cutthroat trout within streams: North American Journal of Fisheries Management, v. 23, p. 1042-1049.
Dunham, J.B., Rieman, B.E., Chandler, G.L., 2003, Influences of temperature and environmental variable on the distribution of bull trout within streams at the southern margin of its range: North American Journal of Fisheries Management, v. 23, p. 894-904, https://doi.org/http://dx.doi.org/10.1577/M02-028.
Isaak, D.J., Thurow, R.F., Rieman, B.E., Dunham, J.B., 2003, Temporal variation in synchrony among Chinook salmon (Oncorhynchus tshawytscha) redd counts from a wilderness area in central Idaho: Canadian Journal of Fisheries and Aquatic Sciences, v. 60, p. 840-848.
Dunham, J.B., Adams, S.B., Schroeter, R., Novinger, D.C., 2002, Alien invasions in aquatic ecosystems - Toward an understanding of brook trout invasions and potential impacts on inland cutthroat trout in western North America: Reviews in Fish Biology and Fisheries, v. 12, p. 373-391.
Dunham, J.B., Cade, B.S., Terrell, J.W., 2002, Influences of spatial and temporal variation on fish-habitat relationships defined by regression quantiles: Transactions of the American Fisheries Society, v. 131, p. 86-98.
Sauter, S.T., McMillan, J.R., Dunham, J.B., 2001, Salmonid behavior and water temperature: US Environmental Protection Agency, Region 10 EPA-910-D-01-001, p. 36.
Dunham, J.B., Rieman, B.E., Davis, K., 2001, Sources and magnitude of sampling error in redd counts for bull trout: North American Journal of Fisheries Management, v. 21, p. 343-352.
Dunham, J.B., 2000, Book Review - Metapopulations and Ecology by I. Hanksi. Oxford University Press, New York: Ecology, v. 81, no. 6, p. 1757-1758, https://doi.org/10.1890/0012-9658(2000)081[1757:MAE]2.0.CO;2.
Dunham, J.B., Rahn, M.E., Schroeter, R., Breck, S.W., 2000, Diets of sympatric Lahontan cutthroat trout and nonnative brook trout- implications for species interactions: Western North American Naturalist, v. 60, no. 3, p. 304-310.
Dunham, J.B., Dickerson, B.G., Beever, E.A., Duncan, R.D., Vinyard, G.L., 2000, Effects of food limitation and emigration on self-thinning in experimental minnow cohorts: Journal of Animal Ecology, v. 69, p. 927-934.
Rieman, B.E., Dunham, J.B., 2000, Metapopulations and salmonids - A synthesis of life history patterns and empirical observations: Ecology of Freshwater Fish, v. 9, p. 51-64.
Dunham, J.B., Peacock, M., Rieman, B.E., Schroeter, R., Vinyard, G.L., 1999, Local and geographic variability in the distribution of stream-living Lahontan cutthroat trout: Transactions of the American Fisheries Society, v. 128, p. 875-889.
Dunham, J.B., Rieman, B.E., 1999, Metapopulation structure of bull trout - Influences of physical, biotic, and geometrical landscape characteristics: Ecological Applications, v. 9, no. 2, p. 642-655, https://doi.org/10.1890/1051-0761(1999)009[0642:MSOBTI]2.0.CO;2.
Dunham, J.B., Minckley, W.L., 1998, Allozymic variation in desert pupfish from natural and artificial habitats- Genetic conservation in fluctuating populations: Biological Conservation, v. 84, p. 7-15.
Dunham, J.B., Vinyard, G.L., Rieman, B.E., 1997, Habitat fragmentation and extinction risk of Lahontan cutthroat trout: North American Journal of Fisheries Management, v. 17, p. 1126-1133.
Dunham, J.B., Vinyard, G.L., 1997, Incorporating stream level variability into analysis of site level fish habitat relationships- some cautionary examples: Transactions of the American Fisheries Society, v. 126, p. 323-329.
Dunham, J.B., Vinyard, G.L., 1997, Relationships between body mass, population density, and the self thinning rule in stream-living salmonids: Canadian Journal of Fisheries and Aquatic Sciences, v. 54, no. 5, p. 1025-1030, https://doi.org/10.1139/f97-012.

To request an interview, contact fresc_outreach@usgs.gov or call (541) 750-1030.

Filter Total Items: 25
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Shade, Light, and Stream Temperature Responses to Riparian Thinning

Resource managers are interested in understanding whether thinning trees in riparian forests could help existing trees grow larger, eventually...

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Evaluating Coexistence of Fish Species with Coastal Cutthroat Trout

Many stream studies in the Pacific Northwest have focused solely on coastal cutthroat trout, the most prevalent species, though it is well-known that...

Read Article
link

Great Expectations: Deconstructing the Process Pathways Underlying Beaver-related Restoration

Beaver-related restoration is a process-based strategy that seeks to re-establish dam building in degraded stream systems by translocating beavers to...

Read Article
link

Assessing Cold-Water Refuges for Salmon and Steelhead in the Columbia River

Interactions among river conditions that influence fish migration success make it challenging to assess management options. 

Read Article
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Nowhere to Hide: The Importance of Instream Cover for Coastal Cutthroat Trout During Low Flow

During seasonal low flow in streams, survival of fish is low and predation risk is high, which could be explained by a lack of available cover.

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Potential Burrowing Habitat for Lamprey Larvae in the Umpqua River Basin, Oregon

Lampreys in the Umpqua River basin face multiple threats, including predation by nonnative fish such as smallmouth bass.

Read Article
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Unfamiliar Territory: Emerging Themes for Ecological Drought Research and Management

Novel forms of drought are emerging globally, due to climate change, shifting teleconnection patterns, expanding human water use, and a history of...

Read Article
link

Year-Old Coho Capitalize on Stream Resources in Two Alaska Streams

The first year of life is perilous for a salmonid, typified by a critical period of post-emergence mortality. 

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Beyond Sticks and Stones: Integrating Both Abiotic and Biotic Factors into Watershed Restoration Assessments

Watershed assessments are often used to prioritize restoration, yet these assessments primarily focus on geomorphic conditions and less frequently...

Read Article
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What to do when Invaders are out of Control?

Impacts from biological invasions are especially prevalent in freshwaters. Conventional approaches to managing invaders such as prevention, control...

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FLOwPER User’s Guide—For Collection of FLOw PERmanence Field Observations

USGS and USFS develop a mobile application field form for rapid collection of flow/no flow observations.

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Can Nutrient Additions Facilitate Recovery of Pacific Salmon?

Multiple restoration actions have been implemented in response to declining salmon populations, including adding salmon carcasses or artificial...

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Science and Products

  • Science
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    three scientists preparing to conduct an underwater biological survey

    Aquatic & Landscape Ecology Research Team (FRESC)

    Fresh waters are one of the most valuable and threatened resources worldwide. They supply critical services to society and harbor many of the world’s most imperiled species. We conduct research and provide technical assistance to address challenges to fresh waters. Our research focuses on ecological processes in freshwater and terrestrial systems and the effects of those processes on landscape...
    By
    Forest and Rangeland Ecosystem Science Center
    link

    Aquatic & Landscape Ecology Research Team (FRESC)

    Fresh waters are one of the most valuable and threatened resources worldwide. They supply critical services to society and harbor many of the world’s most imperiled species. We conduct research and provide technical assistance to address challenges to fresh waters. Our research focuses on ecological processes in freshwater and terrestrial systems and the effects of those processes on landscape...
    Learn More
    Filter Total Items: 16
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    Elwha River flowing through former Aldwell reservoir

    USGS science supporting the Elwha River Restoration Project

    The Elwha River Restoration Project has reconnected the water, salmon, and sediment of a pristine river and coast of the Olympic Peninsula of Washington. Coordinated by the National Park Service, restoration of the Elwha River included the removal of two large dams that had blocked salmon and sediment passage for almost 100 years. The largest dam removal in U.S. history began in September 2011 and...
    By
    Ecosystems, Natural Hazards, Coastal and Marine Hazards and Resources Program, Fisheries Program, Pacific Coastal and Marine Science Center
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    USGS science supporting the Elwha River Restoration Project

    The Elwha River Restoration Project has reconnected the water, salmon, and sediment of a pristine river and coast of the Olympic Peninsula of Washington. Coordinated by the National Park Service, restoration of the Elwha River included the removal of two large dams that had blocked salmon and sediment passage for almost 100 years. The largest dam removal in U.S. history began in September 2011 and...
    Learn More
    link
    Image: Pacific Lamprey (Lampetra tridentata)

    Controls on Habitat for Native Lampreys in the Umpqua River Basin

    Native lampreys are culturally significant fishes for tribal communities in Oregon. As such, the USGS has begun working with the Cow Creek Band of Umpqua Tribe of Indians to study changes that may be affecting habitat for native Pacific and western brook lampreys in the Umpqua River basin.
    By
    Oregon Water Science Center
    link

    Controls on Habitat for Native Lampreys in the Umpqua River Basin

    Native lampreys are culturally significant fishes for tribal communities in Oregon. As such, the USGS has begun working with the Cow Creek Band of Umpqua Tribe of Indians to study changes that may be affecting habitat for native Pacific and western brook lampreys in the Umpqua River basin.
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    link
    siletz channel

    Controls on Salmon and Lamprey Habitat along the Siletz River

    Chinook Salmon and Pacific Lamprey are culturally significant fishes to the Tribal community along the Siletz River, Oregon. The USGS has begun studying how streamflow and bedload conditions may influence mainstem spawning habitats.
    By
    Oregon Water Science Center
    link

    Controls on Salmon and Lamprey Habitat along the Siletz River

    Chinook Salmon and Pacific Lamprey are culturally significant fishes to the Tribal community along the Siletz River, Oregon. The USGS has begun studying how streamflow and bedload conditions may influence mainstem spawning habitats.
    Learn More
    link
    Section of Prospect Creek where stream has no flow

    Probability of Streamflow Permanence (PROSPER)

    PRObability of Streamflow PERmanence (PROSPER) Rivers and streams are constantly changing. Streamflows can change throughout the year and between years due to snowmelt, precipitation, diversions, and return flows. For many streams, these fluctuations determine whether a stream has year-round flow or not. PROSPER is a project initiated to better understand what causes these fluctuations in...
    By
    Groundwater and Streamflow Information Program, Forest and Rangeland Ecosystem Science Center, Idaho Water Science Center, Washington Water Science Center, Wyoming-Montana Water Science Center
    link

    Probability of Streamflow Permanence (PROSPER)

    PRObability of Streamflow PERmanence (PROSPER) Rivers and streams are constantly changing. Streamflows can change throughout the year and between years due to snowmelt, precipitation, diversions, and return flows. For many streams, these fluctuations determine whether a stream has year-round flow or not. PROSPER is a project initiated to better understand what causes these fluctuations in...
    Learn More
    link
    USGS science for a changing world

    Threat of Invasives to Native Species and Ecosystems

    Invasive species are a growing threat to native species and ecosystem processes in fresh waters. The Introducing non-native fish into an area may have no effect, little current effect, or the potential to seriously impact the native species, possibly resulting in their extinction. We conduct research to address the causes of invasions and their impacts. We also provide technical support for...
    By
    Ecosystems, Wildlife Program, Forest and Rangeland Ecosystem Science Center
    link

    Threat of Invasives to Native Species and Ecosystems

    Invasive species are a growing threat to native species and ecosystem processes in fresh waters. The Introducing non-native fish into an area may have no effect, little current effect, or the potential to seriously impact the native species, possibly resulting in their extinction. We conduct research to address the causes of invasions and their impacts. We also provide technical support for...
    Learn More
    link
    USGS science for a changing world

    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, to...
    By
    Forest and Rangeland Ecosystem Science Center
    link

    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, to...
    Learn More
    link
    USGS science for a changing world

    Climate and Aquatic Ecosystems

    Effects of changing climate on aquatic ecosystems requires understanding a complex series of interactions between terrestrial climates, their corresponding impacts on hydrological processes, and ultimately a suite of biological responses. These uncertainties stand in contrast to the urgent need for reliable information to be used in developing long-term strategies for climate adaptation to...
    By
    Forest and Rangeland Ecosystem Science Center
    link

    Climate and Aquatic Ecosystems

    Effects of changing climate on aquatic ecosystems requires understanding a complex series of interactions between terrestrial climates, their corresponding impacts on hydrological processes, and ultimately a suite of biological responses. These uncertainties stand in contrast to the urgent need for reliable information to be used in developing long-term strategies for climate adaptation to...
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    link
    USGS

    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, and...
    By
    Forest and Rangeland Ecosystem Science Center
    link

    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, and...
    Learn More
    link
    Colorado River in drought

    Webinar: Understanding Water Availability Across Landscapes in a Time of Increasing Drought

    View this webinar to learn about a new initiative to address knowledge gaps in water availability at the landscape scale.
    By
    Climate Adaptation Science Center
    link

    Webinar: Understanding Water Availability Across Landscapes in a Time of Increasing Drought

    View this webinar to learn about a new initiative to address knowledge gaps in water availability at the landscape scale.
    Learn More
    link
    USGS science for a changing world logo

    Identifying Resilient Headwater Streams to Mitigate Impacts of Future Drought in the Northwest

    Streams are classified as perennial (flowing uninterrupted, year-round) or intermittent (flowing part of the year) or ephemeral (flowing only during rainfall events). The classifications of “streamflow permanence” were primarily established in the middle 20th century and are often outdated and inaccurate today if they were not adjusted for changes in land use, wildfires, or climate.Understanding w...
    By
    Climate Adaptation Science Centers, Climate Adaptation Science Center
    link

    Identifying Resilient Headwater Streams to Mitigate Impacts of Future Drought in the Northwest

    Streams are classified as perennial (flowing uninterrupted, year-round) or intermittent (flowing part of the year) or ephemeral (flowing only during rainfall events). The classifications of “streamflow permanence” were primarily established in the middle 20th century and are often outdated and inaccurate today if they were not adjusted for changes in land use, wildfires, or climate.Understanding w...
    Learn More
    link
    USGS science for a changing world logo

    Identifying Resilient Headwater Streams to Mitigate Impacts of Future Drought in the Northwest

    Streams are classified as perennial (flowing uninterrupted, year-round) or intermittent (flowing part of the year) or ephemeral (flowing only during rainfall events). The classifications of “streamflow permanence” were primarily established in the middle 20th century and are often outdated and inaccurate today if they were not adjusted for changes in land use, wildfires, or climate.Understanding w...
    By
    Climate Adaptation Science Centers, Climate Adaptation Science Center
    link

    Identifying Resilient Headwater Streams to Mitigate Impacts of Future Drought in the Northwest

    Streams are classified as perennial (flowing uninterrupted, year-round) or intermittent (flowing part of the year) or ephemeral (flowing only during rainfall events). The classifications of “streamflow permanence” were primarily established in the middle 20th century and are often outdated and inaccurate today if they were not adjusted for changes in land use, wildfires, or climate.Understanding w...
    Learn More
    link
    Image: School of Westslope Cutthroat and Bull Trout

    Webinar: Rangewide Climate Vulnerability Assessment for Threatened Bull Trout

    View this webinar to learn more about threatened bull trout.
    By
    Northwest Climate Science Center, Climate Adaptation Science Center
    link

    Webinar: Rangewide Climate Vulnerability Assessment for Threatened Bull Trout

    View this webinar to learn more about threatened bull trout.
    Learn More
  • Data

    If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

    Stream Temperature in the Lahontan Basin of Nevada and California, 2017-2019

    This dataset includes hourly stream temperature data for 139 temperature logger sites throughout the Lahontan Basin Region of Northern Nevada and Eastern California. Data loggers were part a study beginning in 2017, with data available through 2019 for most locations. The spatial data layer contains site locations, geographic information, data summaries, mean August stream temperatures, and modele
    By
    Forest and Rangeland Ecosystem Science Center

    Fishes of the Harney Basin revisited: A contemporary assessment of the distribution of fish fauna throughout the Harney Basin from 1990 to 2019

    We compiled electrofishing and habitat data sampled from 1990 to 2019 in the Harney Basin by the US Geological Survey (USGS), Oregon Department of Fish and Wildlife (ODFW) and the High Desert Partnership (HDP) to describe native and non-native fish distributions and their habitat associations. USGS collected eDNA data in 2019 to refine the known distributions of common carp (Cyprinus carpio). Site
    By
    Forest and Rangeland Ecosystem Science Center

    Stream Temperature and Water Presence Models of Willow/Whitehorse and Willow/Rock Watersheds, Oregon and Nevada

    This data release contains spatial stream network (SSN) objects and R scripts to run SSN models to predict mean monthly stream temperature between May and August and water presence on May 15, June 15, July 15, and August 15 in the Willow/Whitehorse watershed during 2015, 2016, and 2017 and the Willow/Rock watershed during 2016 and 2017. Functions referenced within the script may accessed in the SS
    By
    Washington Water Science Center

    FLOwPER Database: StreamFLOw PERmanence field observations, August 2019 - October 2019

    IMPORTANT NOTE: More recent versions of these data release are available at this link. This dataset includes spatial locations where streamflow permanence observations (continuous flow, discontinuous flow, and dry) were recorded using the FLOwPER (FLOw PERmanence) field survey available in the Survey 123 and S1 mobile application. Additional information to describe the field conditions are includ
    By
    Washington Water Science Center

    Stream Temperature in the Northern Great Basin region of Southeastern Oregon, 2016-2019

    This dataset includes hourly stream and air temperature data from 124 sites throughout the Northern Great Basin region of SE Oregon. Data loggers were deployed June through September of 2016 and downloaded each subsequent summer through 2019. The spatial data layer contains site locations, geographic information, data summaries, mean August stream temperatures, and modeled NorWest stream temperatu
    By
    Forest and Rangeland Ecosystem Science Center

    Geomorphic and larval lamprey surveys in tributaries of the Umpqua River, Oregon

    Interactions between geomorphic processes at multiple scales shape the distributions of habitats, species, and life stages that a river can support. Understanding these hierarchical processes may be helpful for proactive monitoring and restoration of native Western Brook Lamprey (Lampetra richardsoni) and Pacific Lamprey (Entosphenus tridentatus) in Pacific Northwest rivers. The processes creating
    By
    Oregon Water Science Center

    Stream temperature and drying data from Willow/Whitehorse watersheds, southeast Oregon, 2014-16, and Willow/Rock/Frazer watersheds, northern Nevada, 2015-2016

    These tabular, spatial, and code data sets were created in support of a stream temperature and drying study that took place in the Willow and Whitehorse watersheds of southeastern Oregon from 2014-2016 and the Willow, Rock, and Frazer watersheds of northern Nevada from 2015-2016. A prior data release of stream temperature data and associated spatial data from the Willow and Whitehorse watersheds o
    By
    Forest and Rangeland Ecosystem Science Center

    Stream temperature data from Willow-Whitehorse and Little Blitzen watersheds, southeast Oregon, 2011-2015

    This dataset includes stream temperatures from two data loggers installed at one site in the Little Blitzen River of SE Oregon as part of a redband trout (Oncorhynchus mykiss gairdnerii) study. The site was used as an undisturbed reference in comparison with similar temperature monitoring sites in the Willow-Whitehorse watershed that experienced a 2012 fire that burned nearly the entire watershed.
    By
    Climate Adaptation Science Centers, Climate Adaptation Science Center
  • Multimedia

    If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

    USGS
    link
  • Publications

    If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

    Filter Total Items: 111

    A riverscape approach reveals downstream propagation of stream thermal responses to riparian thinning at multiple scales

    Hydrological connectivity in river networks influences their response to environmental changes as local effects may extend downstream via flowing water. For example, localized changes in riparian forest conditions can affect stream temperatures, and these effects may propagate downstream. However, studies evaluating stream temperature responses to riparian forest management have not considered cum
    By
    Ecosystems, Forest and Rangeland Ecosystem Science Center

    Beyond streamflow: Call for a national data repository of streamflow presence for streams and rivers in the United States

    Observations of the presence or absence of surface water in streams are useful for characterizing streamflow permanence, which includes the frequency, duration, and spatial extent of surface flow in streams and rivers. Such data are particularly valuable for headwater streams, which comprise the vast majority of channel length in stream networks, are often non-perennial, and are frequently the mos
    By
    Water Resources, Washington Water Science Center

    Shade, light, and stream temperature responses to riparian thinning in second-growth redwood forests of northern California

    Resource managers in the Pacific Northwest (USA) actively thin second-growth forests to accelerate the development of late-successional conditions and seek to expand these restoration thinning treatments into riparian zones. Riparian forest thinning, however, may impact stream temperatures–a key water quality parameter often regulated to protect stream habitat and aquatic organisms. To better unde
    By
    Ecosystems, Forest and Rangeland Ecosystem Science Center

    Evaluating coexistence of fish species with coastal cutthroat trout in low order streams of western Oregon and Washington, USA

    When multiple species of fish coexist there are a host of potential ways through which they may interact, yet there is often a strong focus on studies of single species without considering these interactions. For example, many studies of forestry–stream interactions in the Pacific Northwest have focused solely on the most prevalent species: Coastal cutthroat trout. To examine the potential for int
    By
    Ecosystems, Forest and Rangeland Ecosystem Science Center

    Great expectations: Deconstructing the process pathways underlying beaver-related restoration

    Beaver-related restoration is a process-based strategy that seeks to address wide-ranging ecological objectives by reestablishing dam building in degraded stream systems. Although the beaver-related restoration has broad appeal, especially in water-limited systems, its effectiveness is not yet well documented. In this article, we present a process-expectation framework that links beaver-related re
    By
    Ecosystems, Forest and Rangeland Ecosystem Science Center

    Assessing contributions of cold-water refuges to reproductive migration corridor conditions for adult salmon and steelhead trout in the Columbia River, USA

    Diadromous fish populations face multiple challenges along their migratory routes. These challenges include suboptimal water quality, harvest, and barriers to longitudinal and lateral connectivity. Interactions among factors influencing migration success make it challenging to assess management options for improving migratory fish conditions along riverine migration corridors. We describe a spatia
    By
    Ecosystems, Forest and Rangeland Ecosystem Science Center

    Nowhere to hide: The importance of instream cover for stream‐living Coastal Cutthroat Trout during seasonal low flow

    Through their multiple functions, refuges may be important for stream‐living fishes, particularly during stressful events such as seasonal low flow or drought. Coastal Cutthroat Trout Oncorhynchus clarkii clarkii is an ideal study organism to understand the importance of refuge. During seasonal low flow, lower water levels limit access to refuge and emigration, survival of fish is low, and predati
    By
    Ecosystems, Forest and Rangeland Ecosystem Science Center

    River network and reach‐scale controls on habitat for lamprey larvae in the Umpqua River Basin, Oregon

    This study developed a spatially explicit framework to support the conservation of Western Brook Lamprey Lampetra richardsoni and Pacific Lamprey Entosphenus tridentatus in the Umpqua River basin, Oregon. This framework identified locations within the river network likely to support “potential burrowing habitat” for lamprey larvae based on geomorphic conditions and evaluated the overlap of potenti
    By
    Water Resources, Oregon Water Science Center

    Unfamiliar territory: Emerging themes for ecological drought research and management

    Novel forms of drought are emerging globally, due to climate change, shifting teleconnection patterns, expanding human water use, and a history of human influence on the environment that increases the probability of transformational ecological impacts. These costly ecological impacts cascade to human communities, and understanding this changing drought landscape is one of today’s grand challenges.
    By
    Ecosystems, Water Resources, Climate Adaptation Science Centers, Climate Adaptation Science Center, Forest and Rangeland Ecosystem Science Center, Southwest Biological Science Center, Lower Mississippi-Gulf Water Science Center

    Beyond sticks and stones: Integrating physical and ecological conditions into watershed restoration assessments using a food web modeling approach

    Watershed assessments have become common for prioritizing restoration in river networks. These assessments primarily focus on geomorphic conditions of rivers but less frequently incorporate non-geomorphic abiotic factors such as water chemistry and temperature, and biotic factors such as the structure of food webs. Using a dynamic food web model that integrates physical and ecological environmenta
    By
    Ecosystems, Forest and Rangeland Ecosystem Science Center

    FLOwPER user guide—For collection of FLOw PERmanence field observations

    The accurate mapping of streams and their streamflow conditions in terms of presence or absence of surface water is important to both understanding physical, chemical, and biological processes in streams and to managing land, water, and ecological resources. This document describes a field form, FLOwPER (FLOw PERmanence), available within a mobile application (app), for standardized data collectio
    By
    Water Resources, Washington Water Science Center

    Linkages between temperature, macroinvertebrates, and young-of-year Coho Salmon growth in surface-water and groundwater streams

    Ecological resources for fishes in stream food webs shift over space and time, providing a complex template of available resources that can be used for growth. We tracked water temperature in conjunction with young-of-year Coho Salmon size, growth, and diet in 2 streams with contrasting thermal regimes: a groundwater stream with colder temperatures and lower thermal variability all year and a surf
    By
    Ecosystems, Forest and Rangeland Ecosystem Science Center

    Pre-USGS Publications

    Rosenberger, A.E., Dunham, J.B., 2005, Validation of abundance estimates from mark-recapture and removal techniques for rainbow trout captured by electrofishing in small streams: North American Journal of Fisheries Management, v. 25, p. 1395-1410.
    Dunham, J.B., Pilliod, D.S., Young, M., 2004, Assessing the Consequences of Nonnative Trout in Headwater Ecosystems in Western North America: Fisheries, v. 29, no. 6, p. 18-26, https://doi.org/http://dx.doi.org/10.1577/1548-8446(2004)29[18:ATCONT]2.0.CO;2.
    Meeuwig, M.H., Dunham, J.B., Hayes, J.P., Vinyard, G.L., 2004, Effects of constant and cyclical thermal regimes on growth and feeding of juvenile cutthroat trout of variable sizes: Ecology of Freshwater Fish, v. 13, p. 208-216.
    Poole, G.C., Dunham, J.B., Keenan, D.M., Sauter, S.T., McCullough, D.A., Mebane, C., Lockwood, J.C., Essig, D.A., Hicks, M.P., Sturdevant, D.J., Materna, E.J., Spalding, M., Risley, J., Deppman, M., 2004, The case for regime-based water quality standards: BioScience, v. 54, no. 2, p. 155-161.
    Peterson, J., Dunham, J.B., 2003, Combining inferences from models of capture efficiency, detectability, and suitable habitat to classify landscapes for conservation of threatened bull trout: Conservation Biology, v. 17, no. 4, p. 1070-1077.
    Dunham, J.B., Schroeter, R., Rieman, B.E., 2003, Influence of maximum water temperature on occurence of Lahotan cutthroat trout within streams: North American Journal of Fisheries Management, v. 23, p. 1042-1049.
    Dunham, J.B., Rieman, B.E., Chandler, G.L., 2003, Influences of temperature and environmental variable on the distribution of bull trout within streams at the southern margin of its range: North American Journal of Fisheries Management, v. 23, p. 894-904, https://doi.org/http://dx.doi.org/10.1577/M02-028.
    Isaak, D.J., Thurow, R.F., Rieman, B.E., Dunham, J.B., 2003, Temporal variation in synchrony among Chinook salmon (Oncorhynchus tshawytscha) redd counts from a wilderness area in central Idaho: Canadian Journal of Fisheries and Aquatic Sciences, v. 60, p. 840-848.
    Dunham, J.B., Adams, S.B., Schroeter, R., Novinger, D.C., 2002, Alien invasions in aquatic ecosystems - Toward an understanding of brook trout invasions and potential impacts on inland cutthroat trout in western North America: Reviews in Fish Biology and Fisheries, v. 12, p. 373-391.
    Dunham, J.B., Cade, B.S., Terrell, J.W., 2002, Influences of spatial and temporal variation on fish-habitat relationships defined by regression quantiles: Transactions of the American Fisheries Society, v. 131, p. 86-98.
    Sauter, S.T., McMillan, J.R., Dunham, J.B., 2001, Salmonid behavior and water temperature: US Environmental Protection Agency, Region 10 EPA-910-D-01-001, p. 36.
    Dunham, J.B., Rieman, B.E., Davis, K., 2001, Sources and magnitude of sampling error in redd counts for bull trout: North American Journal of Fisheries Management, v. 21, p. 343-352.
    Dunham, J.B., 2000, Book Review - Metapopulations and Ecology by I. Hanksi. Oxford University Press, New York: Ecology, v. 81, no. 6, p. 1757-1758, https://doi.org/10.1890/0012-9658(2000)081[1757:MAE]2.0.CO;2.
    Dunham, J.B., Rahn, M.E., Schroeter, R., Breck, S.W., 2000, Diets of sympatric Lahontan cutthroat trout and nonnative brook trout- implications for species interactions: Western North American Naturalist, v. 60, no. 3, p. 304-310.
    Dunham, J.B., Dickerson, B.G., Beever, E.A., Duncan, R.D., Vinyard, G.L., 2000, Effects of food limitation and emigration on self-thinning in experimental minnow cohorts: Journal of Animal Ecology, v. 69, p. 927-934.
    Rieman, B.E., Dunham, J.B., 2000, Metapopulations and salmonids - A synthesis of life history patterns and empirical observations: Ecology of Freshwater Fish, v. 9, p. 51-64.
    Dunham, J.B., Peacock, M., Rieman, B.E., Schroeter, R., Vinyard, G.L., 1999, Local and geographic variability in the distribution of stream-living Lahontan cutthroat trout: Transactions of the American Fisheries Society, v. 128, p. 875-889.
    Dunham, J.B., Rieman, B.E., 1999, Metapopulation structure of bull trout - Influences of physical, biotic, and geometrical landscape characteristics: Ecological Applications, v. 9, no. 2, p. 642-655, https://doi.org/10.1890/1051-0761(1999)009[0642:MSOBTI]2.0.CO;2.
    Dunham, J.B., Minckley, W.L., 1998, Allozymic variation in desert pupfish from natural and artificial habitats- Genetic conservation in fluctuating populations: Biological Conservation, v. 84, p. 7-15.
    Dunham, J.B., Vinyard, G.L., Rieman, B.E., 1997, Habitat fragmentation and extinction risk of Lahontan cutthroat trout: North American Journal of Fisheries Management, v. 17, p. 1126-1133.
    Dunham, J.B., Vinyard, G.L., 1997, Incorporating stream level variability into analysis of site level fish habitat relationships- some cautionary examples: Transactions of the American Fisheries Society, v. 126, p. 323-329.
    Dunham, J.B., Vinyard, G.L., 1997, Relationships between body mass, population density, and the self thinning rule in stream-living salmonids: Canadian Journal of Fisheries and Aquatic Sciences, v. 54, no. 5, p. 1025-1030, https://doi.org/10.1139/f97-012.
  • News

    To request an interview, contact fresc_outreach@usgs.gov or call (541) 750-1030.

    Filter Total Items: 25
    link

    Shade, Light, and Stream Temperature Responses to Riparian Thinning

    Resource managers are interested in understanding whether thinning trees in riparian forests could help existing trees grow larger, eventually...

    Read Article
    link

    Evaluating Coexistence of Fish Species with Coastal Cutthroat Trout

    Many stream studies in the Pacific Northwest have focused solely on coastal cutthroat trout, the most prevalent species, though it is well-known that...

    Read Article
    link

    Great Expectations: Deconstructing the Process Pathways Underlying Beaver-related Restoration

    Beaver-related restoration is a process-based strategy that seeks to re-establish dam building in degraded stream systems by translocating beavers to...

    Read Article
    link

    Assessing Cold-Water Refuges for Salmon and Steelhead in the Columbia River

    Interactions among river conditions that influence fish migration success make it challenging to assess management options. 

    Read Article
    link

    Nowhere to Hide: The Importance of Instream Cover for Coastal Cutthroat Trout During Low Flow

    During seasonal low flow in streams, survival of fish is low and predation risk is high, which could be explained by a lack of available cover.

    Read Article
    link

    Potential Burrowing Habitat for Lamprey Larvae in the Umpqua River Basin, Oregon

    Lampreys in the Umpqua River basin face multiple threats, including predation by nonnative fish such as smallmouth bass.

    Read Article
    link

    Unfamiliar Territory: Emerging Themes for Ecological Drought Research and Management

    Novel forms of drought are emerging globally, due to climate change, shifting teleconnection patterns, expanding human water use, and a history of...

    Read Article
    link

    Year-Old Coho Capitalize on Stream Resources in Two Alaska Streams

    The first year of life is perilous for a salmonid, typified by a critical period of post-emergence mortality. 

    Read Article
    link

    Beyond Sticks and Stones: Integrating Both Abiotic and Biotic Factors into Watershed Restoration Assessments

    Watershed assessments are often used to prioritize restoration, yet these assessments primarily focus on geomorphic conditions and less frequently...

    Read Article
    link

    What to do when Invaders are out of Control?

    Impacts from biological invasions are especially prevalent in freshwaters. Conventional approaches to managing invaders such as prevention, control...

    Read Article
    link

    FLOwPER User’s Guide—For Collection of FLOw PERmanence Field Observations

    USGS and USFS develop a mobile application field form for rapid collection of flow/no flow observations.

    Read Article
    link

    Can Nutrient Additions Facilitate Recovery of Pacific Salmon?

    Multiple restoration actions have been implemented in response to declining salmon populations, including adding salmon carcasses or artificial...

    Read Article