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Our scientists in the Northwest Region conduct impartial, multi- and interdisciplinary research and monitoring on a large range of natural-resource issues that impact the quality of life of citizens of the Northwest states of Idaho, Montana, Oregon, Washington, and Wyoming.

Filter Total Items: 72
Acoustc Doppler velocity meter
Date Published: January 1, 2017
Status: Completed

Surrogate Technologies for Estimating Suspended Sediment in the Snake and Clearwater Rivers

Because fluvial sediment poses both economic and ecological problems, resource managers need a safe, cost-effective way to measure sediment in streams, particularly in remote areas.

Contacts: Ryan L Fosness
Colorized, multi-beam bathymetry showing scour hole (blue)
Date Published: January 1, 2017
Status: Completed

Lower Granite Reservoir Bathymetric and Underwater Video Surveys

Sedimentation of Lower Granite Reservoir, operated by the U.S. Army Corps of Engineers, affects commercial navigation and reservoir storage capacity. Some groups are concerned that dredging the reservoir to remove excess sediment may negatively affect endangered species such as steelhead and salmon.

Contacts: Ryan L Fosness
USGS scientists drilling core
Date Published: January 1, 2017
Status: Completed

Lower Granite Reservoir Bed Sediment Coring and Analysis

Some groups are concerned that dredging the reservoir and the confluence of the Snake and Clearwater Rivers to remove excess sediment may mobilize contaminants in sediment that could negatively affect endangered species such as steelhead and salmon.

Contacts: Ryan L Fosness
Sampling sediment during high streamflow conditions on the Selway River, Idaho
Date Published: January 1, 2017
Status: Completed

Sediment Sampling in the Snake and Clearwater River Basins

Are there ways to manage sediment before it accumulates in Lower Granite Reservoir? If so, resource managers must know exactly how much sediment is being transported in the lower Snake and Clearwater River basins, the grain-size distribution of the sediment that is being transported, which subbasins are contributing the most sediment, and how the sediment is being deposited once it is...

Scientist collecting stream data
Date Published: December 5, 2016
Status: Active

WaterSMART: Apalachicola/Chattahoochee/ Flint River (ACF) Basin

The Challenge: The DOI WaterSMART (Sustain and Manage America’s Resources for Tomorrow) initiative is developing data and tools to help water managers identify current and future water shortages, for humans and for freshwater ecosystems. Fishes, for example, can decline in diversity and abundance when streamflow becomes too low, for too long.  However, ecologists find that effects of declining...

A Burmese python coiled in the grass in the Everglades.
Date Published: December 4, 2016

Biology, Impacts and Control of Invasive Reptiles

Invasive species are considered to be second only to habitat degradation in terms of negative impacts on the Earth’s ecosystems, and our scientists make up a significant proportion of the global expertise in the rapidly-growing problem of invasive reptiles.

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Date Published: December 1, 2016

USGS Brown Treesnake Laboratory and Rapid Response Facility - Guam

USGS scientists and staff associated with the Brown Treesnake Project are co-located at the Guam National Wildlife Refuge at the northern end of Guam in the western Pacific Ocean. Project staff work on developing and testing control tools for invasive brown treesnakes, as well as understanding their impacts on Guam's ecosystems. Project staff also lead the multi-agency Brown Treesnake Rapid...

Glines Canyon Dam on the Elwha River, during the dam removal process. Photo credit: National Park Service
Date Published: November 29, 2016

Riparian Vegetation Response to Dam Removal

Dam removal is an approach to river restoration that is becoming increasingly common. In most cases, dam removal is driven by considerations other than river restoration like dam safety, but how dam removal affects aquatic and riparian systems is of great interest in many dam removals. My work in this area has had two areas of focus thus far: 1) studies of vegetation and geomorphic change...

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Date Published: October 27, 2016

Wyoming Landscape Conservation Initiative: Inventory and Long-Term Monitoring

The Wyoming Landscape Conservation Initiative (WLCI) addresses effects of land-use and climate changes on Southwest Wyoming’s natural resources. In partnership with twelve Federal, State, and local natural resource agencies, and non-governmental organizations– FORT and ten other USGS centers are conducting dozens of integrated science projects to assess the status of Southwest Wyoming’s...

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Date Published: October 27, 2016

Wyoming Landscape Conservation Initiative: Mechanistic Studies of Wildlife

The Wyoming Landscape Conservation Initiative (WLCI) addresses effects of land-use and climate changes on Southwest Wyoming’s natural resources. In partnership with twelve Federal, State, and local natural resource agencies, and non-governmental organizations– FORT and ten other USGS centers are conducting dozens of integrated science projects to assess the status of Southwest Wyoming’s...

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Date Published: October 27, 2016

Wyoming Landscape Conservation Initiative: Baseline Synthesis

The Wyoming Landscape Conservation Initiative (WLCI) addresses effects of land-use and climate changes on Southwest Wyoming’s natural resources. In partnership with twelve Federal, State, and local natural resource agencies, and non-governmental organizations– FORT and ten other USGS centers are conducting dozens of integrated science projects to assess the status of Southwest Wyoming’s...

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Date Published: October 27, 2016

Wyoming Landscape Conservation Initiative: Effectiveness Monitoring

The Wyoming Landscape Conservation Initiative (WLCI) addresses effects of land-use and climate changes on Southwest Wyoming’s natural resources. In partnership with twelve Federal, State, and local natural resource agencies, and non-governmental organizations– FORT and ten other USGS centers are conducting dozens of integrated science projects to assess the status of Southwest Wyoming’s...

Filter Total Items: 495
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Year Published: 2017

Ecosystem vs. community recovery 25 years after grass invasions and fire in a subtropical woodland

Despite a large body of research documenting invasive plant impacts, few studies have followed individual invaded sites over decades to observe how they change, and none have contrasted how compositional impacts from invasion compare to ecosystem-process impacts over a multi-decadal time-scale. Using direct measurements of plant density and...

D'Antonio, Carla M.; Yelenik, Stephanie G.; Mack, Michelle C.
D'Antonio, C. M., S. G. Yelenik, and M. C. Mack. 2017. Ecosystem vs. community recovery 25 years after grass invasions and fire in a subtropical woodland. Journal of Ecology 105:1462–1474.

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Year Published: 2017

Program MAMO: Models for avian management optimization-user guide

The following chapters describe the structure and code of MAMO, and walk the reader through running the different components of the program with sample data. This manual should be used alongside a computer running R, so that the reader can copy and paste code into R, observe the output, and follow along interactively. Taken together, chapters 2–4...

Guillaumet, Alban; Paxton, Eben H.
Guillaumet, A., and E. H. Paxton. 2017. Program MAMO: Models for avian management optimization-user guide. Hawai`i Cooperative Studies Unit Technical Report HCSU-TR077, University of Hawai'i at Hilo, Hilo, Hawai‘i. Available: http://hdl.handle.net/10790/3312.

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Year Published: 2017

Shifts in an invasive rodent community favoring black rats (Rattus rattus) following restoration of native forest

One potential, unintended ecological consequence accompanying forest restoration is a shift in invasive animal populations, potentially impacting conservation targets. Eighteen years after initial restoration (ungulate exclusion, invasive plant control, and out planting native species) at a 4 ha site on Maui, Hawai'i, we compared invasive rodent...

Shiels, Aaron B.; Medeiros, Arthur C.; von Allmen, Erica I.
Shiels, A. B., A. C. Medeiros, and E. I. von Allmen. 2017. Shifts in an invasive rodent community favoring Black rats (Rattus rattus) following restoration of native forest. Restoration Ecology 25:759–767. Available: http://onlinelibrary.wiley.com/doi/10.1111/rec.12494/full

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Year Published: 2017

The influence of soil resources and plant traits on invasion and restoration in a subtropical woodland

It has been shown in some cases that nitrogen (N) addition to soil will increase abundance of plant invaders because many invaders have traits that promote rapid growth in response to high resource supply. Similarly, it has been suggested, and sometimes shown, that decreasing soil N via carbon (C) additions can facilitate native species recovery....

Yelenik, Stephanie G.; D'Antonio, Carla M.; August-Schmidt, Elizabeth
Yelenik, S. G., C. M. D’Antonio, and E. August-Schmidt. 2017. The influence of soil resources and plant traits on invasion and restoration in a subtropical woodland. Plant Ecology 218:1149–1161. Available: https://link.springer.com/article/10.1007/s11258-017-0757-3

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Year Published: 2017

Biogeographical variation of plumage coloration in the sexually dichromatic Hawai‘i ‘Amakihi (Chlorodrepanis virens)

Plumage coloration in birds can be of major importance to mate selection, social signaling, or predator avoidance. Variations in plumage coloration related to sex, age class, or seasons have been widely studied, but the effect of other factors such as climate is less known. In this study, we examine how carotenoid-based plumage coloration and...

Gaudioso-Levita, Jacqueline M.; Hart, Patrick J.; Lapointe, Dennis; Veillet, Anne; Sebastian-Gonzalez, Esther
Gaudioso-Levita, J. M., P. J. Hart, D. A. LaPointe, A. C. Veillet, and E. Sebastián-González. 2017. Biogeographical variation of plumage coloration in the sexually dichromatic Hawai‘i ‘Amakihi (Chlorodrepanis virens). Journal of Ornithology 158:955–964.

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Year Published: 2017

Do you hear what I see? Vocalization relative to visual detection rates of Hawaiian hoary bats (Lasiurus cinereus semotus)

Bats vocalize during flight as part of the sensory modality called echolocation, but very little is known about whether flying bats consistently call. Occasional vocal silence during flight when bats approach prey or conspecifics has been documented for relatively few species and situations. Bats flying alone in clutter-free airspace are not known...

Gorresen, Paulo Marcos; Cryan, Paul; Montoya-Aiona, Kristina; Bonaccorso, Frank
Gorresen, P. M., P. M. Cryan, K. Montoya-Aiona, and F. J. Bonaccorso. 2017. Do you hear what I see? Vocalization relative to visual detection rates of Hawaiian hoary bats (Lasiurus cinereus semotus). Ecology and Evolution 7:6669–6679. Available: http://onlinelibrary.wiley.com/doi/10.1002/ece3.3196/full

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Year Published: 2017

Survivorship across the annual cycle of a migratory passerine, the willow flycatcher

Annual survivorship in migratory birds is a product of survival across the different periods of the annual cycle (i.e. breeding, wintering, and migration), and may vary substantially among these periods. Determining which periods have the highest mortality, and thus are potentially limiting a population, is important especially for species of...

Paxton, Eben H.; Durst, Scott L.; Sogge, Mark K.; Koronkiewicz, Thomas J.; Paxton, Kristina L.
Paxton, E. H., S. L. Durst, M. K. Sogge, T. J. Koronkiewicz, and K. L. Paxton. 2017. Survivorship across the annual cycle of a migratory passerine, the willow flycatcher. Journal of Avian Biology 48:1126–1131. Available: http://dx.doi.org/10.1111/jav.01371

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Year Published: 2017

Hawai`i forest bird monitoring database: Database dictionary

Between 1976 and 1981, the U.S. Fish and Wildlife Service (now U.S. Geological Survey – Pacific Island Ecosystems Research Center [USGS-PIERC]) conducted systematic surveys of forest birds and plant communities on all the main Hawaiian Islands, except O‘ahu, as part of the Hawai‘i Forest Bird Surveys (HFBS). Results of this monumental effort have...

Camp, Richard J.; Genz, Ayesha
Camp, R. J., and A. S. Genz. 2017. Hawai‘i Forest Bird Monitoring Database: database dictionary. Hawai`i Cooperative Studies Unit Technical Report HCSU-TR039, University of Hawai'i at Hilo, Hilo, Hawai‘i. Available: http://hdl.handle.net/10790/3311.

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Year Published: 2017

Lessons from the Tōhoku tsunami: A model for island avifauna conservation prioritization

Earthquake-generated tsunamis threaten coastal areas and low-lying islands with sudden flooding. Although human hazards and infrastructure damage have been well documented for tsunamis in recent decades, the effects on wildlife communities rarely have been quantified. We describe a tsunami that hit the world's largest remaining tropical seabird...

Reynolds, Michelle H.; Berkowitz, Paul; Klavitter, John; Courtot, Karen
Reynolds, M. H., P. Berkowitz, J. L. Klavitter, and K. N. Courtot. 2017. Lessons from the Tōhoku tsunami: A model for island avifauna conservation prioritization. Ecology and Evolution 7:5873–5890. Available: http://dx.doi.org/10.1002/ece3.3092

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Year Published: 2017

Vegetation map for the Hakalau Forest Unit of the Big Island National Wildlife Refuge Complex on the island of Hawai‘i

This vegetation map was produced to serve as an updated habitat base for management of natural resources of the Hakalau Forest Unit (HFU) of the Big Island National Wildlife Refuge Complex (Refuge) on the island of Hawai‘i. The map is based on a vegetation map originally produced as part of the U.S. Fish and Wildlife Service’s Hawai‘i Forest Bird...

Jacobi, James D.
Jacobi, J. D. 2017. Vegetation map for the Hakalau Forest Unit of the Big Island National Wildlife Refuge Complex on the island of Hawai‘i. Hawai`i Cooperative Studies Unit Technical Report HCSU-TR042, University of Hawai'i at Hilo, Hilo, Hawai‘i. Available: http://hdl.handle.net/10790/3300.

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Year Published: 2017

Altitudinal migration and the future of an iconic Hawaiian honeycreeper in response to climate change and management

Altitudinal movement by tropical birds to track seasonally variable resources can move them from protected areas to areas of increased vulnerability. In Hawaiʻi, historical reports suggest that many Hawaiian honeycreepers such as the ‘I‘iwi (Drepanis coccinea) once undertook seasonal migrations, but the existence of such movements today is unclear...

Guillaumet, Alban; Kuntz, Wendy A.; Samuel, Michael D.; Paxton, Eben H.
Guillaumet, A., W. A. Kuntz, M. D. Samuel, and E. H. Paxton. 2017. Altitudinal migration and the future of an iconic Hawaiian honeycreeper in response to climate change and management. Ecological Monographs 87:410–428. Available: http://onlinelibrary.wiley.com/doi/10.1002/ecm.1253/full

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Year Published: 2017

Potential impacts of sea level rise on native plant communities and associated cultural sites in coastal areas of the main Hawaiian Islands

Hawaiian coastal vegetation is comprised of plant species that are adapted to growing in extremely harsh conditions (salt spray, wave wash, wind, and substrates with limited nutrients) found in this habitat zone. Prior to human colonization of Hawai‘i coastal vegetation extended as a continuous ring around each of the islands, broken only by...

Jacobi, James D.; Warshauer, Frederick R.
Jacobi, J. D., and F. R. Warshauer. 2017. Potential impacts of sea level rise on native plant communities and associated cultural sites in coastal areas of the main Hawaiian Islands. Final Report to Pacific Islands Climate Science Center. URL: http://piccc.net/project/impacts-of-sea-level-rise-on-native-plant-communities-in-coastal-areas-of-the-main-hawaiian-islands/.

Our scientists in the Northwest Region conduct impartial, multi- and interdisciplinary research and monitoring on a large range of natural-resource issues that impact the quality of life of citizens of the Northwest states of Idaho, Montana, Oregon, Washington, and Wyoming.

Filter Total Items: 301
August 11, 2016

A2 West Transect – 2016

Permanent Site: A2 West Transect; Depth: 13.2 Meters (43.2 Feet); Distance from river mouth: Kilometers 1.8 (1.1 Miles); Pre/Post Dam Removal: 5 years post-dam removal; Lat/Long: 48.14130295, -123.5883331; Site Description: One of our deeper sites at over 40 feet. Sediment is primarily sand/sandy mud with scattered boulders. Seaweeds are still sparse and mainly acid kelp

...
August 11, 2016

H1 East Transect – 2016

Permanent Site: H1 East Transect; Depth: 5.7 Meters (18.8 Feet); Distance from river mouth: 2.4 Kilometers (1.5 Miles) east; Pre/Post Dam Removal: 5 years post-dam removal; Lat/Long: 48.1479177,-123.53472865; Site Description: This is a shallow site and one of the farthest removed from the effects of the sediment plume outside of the control sites. Substrate is still

...
August 11, 2016

C2 West Transect – 2016

Permanent Site: C2 West Transect; Depth: 16.5 Meters (54.2 Feet); Distance from river mouth: 0.7 Kilometers (0.5 Miles); Pre/Post Dam Removal: 5 years post-dam removal; Lat/Long: 48.147841,-123.57663268; Site Description: One of our deepest sites. Substrate is all muddy sand. Seaweed is absent. Woody debris is present (1:18 seconds). The featherduster tubeworms that were

...
August 10, 2016

L1 West Transect – 2016

Permanent Site: L1 West Transect; Depth: 11.1 Meters (36.5 Feet); Distance from river mouth: 2.3 Kilometers (1.4 Miles) west; Pre/Post Dam Removal: 5 years post-dam removal; Lat/Long: 48.13957527,-123.59427175; Site Description: This transect is medium depth. The first 20 meters contains scattered boulders (0:17 seconds). Where there are no boulders, substrate is mainly

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August 10, 2016

H2 West Transect – 2016

Permanent Site: H2 West Transect; Depth: 7.8 Meters (25.5 Feet); Distance from river mouth: 2.6 Kilometers (1.6 Miles) east; Pre/Post Dam Removal: 5 years post-dam removal; Lat/Long: 48.15008216,-123.53277857; Site Description: This site is medium to shallow depth. Substrate is mainly gravel with some sand, cobble and an occasional boulder and has not changed since dam

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August 10, 2016

C2 East Transect – 2016

Permanent Site: C2 East Transect; Depth: 16.1 Meters (52.8 Feet); Distance from river mouth: 0.7 Kilometers (0.4 Miles); Pre/Post Dam Removal: 5 years post-dam removal; Lat/Long: 48.147841,-123.57596074; Site Description: One of our deepest sites. Substrate is all muddy sand. Seaweed is absent. A very large pile of woody debris lying in an indentation in the sand is seen

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August 9, 2016

A1 West Transect – 2016

Permanent Site: A1 West Transect; Depth: 9.0 Meters (29.6 Feet); Distance from river mouth: 1.9 Kilometers (1.2 Miles) West; Pre/Post Dam Removal: 5 years post-dam removal; Lat/Long: 48.13870775, -123.586203; Site Description: Transect is in eastern part of Freshwater Bay. Sediment is primarily sand/sandy mud with patches of boulders. Seaweeds are common this year. Most

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August 9, 2016

H2 East Transect – 2016

Permanent Site: H2 East Transect; Depth: 8.1 Meters (26.6 Feet); Distance from river mouth: 2.6 Kilometers (1.6 Miles) east; Pre/Post Dam Removal: 5 years post-dam removal; Lat/Long: 48.15008216,-123.53210661; Site Description: This site is medium to shallow depth. Substrate is mainly gravel with some sand, cobble and an occasional boulder and has not changed since dam

...
August 8, 2016

4SP1 East Transect – 2016

Permanent Site: 4SP1 - East Transect; Depth: 5.2 Meters (17.0 Feet); Distance from river mouth: 0.8 Kilometers (0.5 Miles) East; Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.15257, -123.556704; Site Description: The site has converted from gravel/cobble substrate to all sand. Seaweed is completely absent. 
 

August 8, 2016

4SP1 West Transect – 2016

Permanent Site: 4SP1 - West Transect; Depth: 6.1 Meters (19.9 Feet); Distance from river mouth: 0.8 Kilometers (0.5 Miles) East; Pre/Post Dam Removal: 3 years post-dam removal; Lat/Long: 48.15257, -123.557376; Site Description: The site has converted from gravel/cobble substrate to all sand. Seaweed is completely absent. 
 

August 8, 2016

C1 East Transect – 2016

Permanent Site: C1 East Transect; Depth: Meters (Feet); Distance from river mouth: 0.7 Kilometers (0.4 Miles); Pre/Post Dam Removal: 5 years post-dam removal; Lat/Long: 48.14525225,-123.57294101; Site Description: Substrate is entirely sand. All seaweeds are absent. Woody debris is present (0:26, seconds). Invertebrates are scarce and are almost exclusively the ornate

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August 8, 2016

C1 West Transect – 2016

Permanent Site: C1 West Transect; Depth: Meters (Feet); Distance from river mouth: 0.7 Kilometers (0.4 Miles); Pre/Post Dam Removal: 5 years post-dam removal; Lat/Long: 48.14525225,-123.57361291; Site Description: Substrate is entirely sand. All seaweeds are absent. Woody debris is present (0:12, 1:49 seconds). Invertebrates are scarce and are almost exclusively the ornate

...

Our scientists in the Northwest Region conduct impartial, multi- and interdisciplinary research and monitoring on a large range of natural-resource issues that impact the quality of life of citizens of the Northwest states of Idaho, Montana, Oregon, Washington, and Wyoming.

Filter Total Items: 79
Image shows sagebrush lands with cloudy sky
October 4, 2016

At the request of the Bureau of Land Management, USGS has released an assessment of mineral resources in six Western states.

Golden Eagle in flight
September 28, 2016

Roughly over a quarter of the golden eagles killed at the Altamont Pass Wind Resource Area in Northern California from 2012-2014 were recent immigrants to the local population, according to research led by the U.S. Geological Survey. 

Image: Boise Watershed Watch
September 19, 2016

Now in its ninth year, Watershed Watch educates children and adults about the health of the Boise River watershed

USGS scientists receiving Riverprize recognition.
September 13, 2016

NEW DELHI, INDIA – The collaborative work of the U.S. Department of the Interior and the Lower Elwha Klallam Tribe to restore the Elwha River of Washington, USA was recognized as a world-renowned restoration project during the awarding of the 2016 Thiess International Riverprize.

Southwestern Willow Flycatcher
September 6, 2016

A new report by the U.S. Geological Survey shows, for the first time ever, detailed habitat information on the entire range of a federally listed endangered bird allowing officials to take a scientific approach to helping protect the species.

Female scientist and young girls looking at scientific equipment
August 4, 2016

MEDIA ADVISORY

Twenty middle-school girls from Washington and Oregon are participating in the second annual “GeoGirls” outdoor volcano science program at Mount St. Helens, jointly organized by the U.S. Geological Survey and the Mount St. Helens Institute.

Black-throated gray warbler
July 22, 2016

Researchers are working to understand how to lessen the impacts of climate change on birds and other forest inhabitants.

Tanner Creek outfall
May 17, 2016

A new study found high concentrations of commonly used insecticides in streams running through the highly urbanized portion of Clackamas County.

Our scientists in the Northwest Region conduct impartial, multi- and interdisciplinary research and monitoring on a large range of natural-resource issues that impact the quality of life of citizens of the Northwest states of Idaho, Montana, Oregon, Washington, and Wyoming.

Our scientists in the Northwest Region conduct impartial, multi- and interdisciplinary research and monitoring on a large range of natural-resource issues that impact the quality of life of citizens of the Northwest states of Idaho, Montana, Oregon, Washington, and Wyoming.

Filter Total Items: 59