Western Fisheries Research Center
6505 NE 65th Street
Seattle, WA 98115
M.S. 1998. Biology. Wayne State University, Detroit, Michigan
B.S. 1993. Biology. Wayne State University, Detroit, Michigan
I am a Research Ecologist with the U.S. Geological Survey's Western Fisheries Research Center, stationed in Seattle, Washington. My research assignment is to develop and execute a research program focused upon priorities of the USGS Ecosystems mission area, in particular those projects that address complex natural resource issues related to land use, habitat restoration, and species recovery. I have had the pleasure to work in diverse ecosystems and ecoregions throughout the United States, on lands and waters contained in both National Parks and military installations. I have also worked across a range of biological scales, from single species to entire communities.
Over the past decade, I have focused much attention on studying the ecological outcomes of dam removal, especially the historic project on the Elwha River. This involved removal of two long-standing dams, with a major goal of restoring the ecosystem and the native anadromous fish populations that once thrived in the river. Working with a multidisciplinary team within the USGS, as well as strong collaborations with partners like NPS, NOAA, FWS, and the Lower Elwha Klallam Tribe, we have developed a portfolio of long-term data sets on physical and biological attributes of the Elwha River before and after dam removal.
Recently I was a member of a dam removal science working group at the USGS John Wesley Powell Center for Analysis and Synthesis. We worked to understand patterns of dam removal science, and to synthesize what is known scientifically about this emerging field. This led to development of the USGS Dam Removal Information Portal, an interactive online tool for visualizing and storing scientific studies associated with dam removals nationwide.
2004 to Present – Research Ecologist, U.S. Geological Survey, Western Fisheries Research Center
1998-2004 – Ecologist, U.S. Geological Survey, Western Fisheries Research Center
1993-1995 – Biological Technician, U.S. Army Corps of Engineers, Construction Engineering Research Laboratory
Honors, Awards, Recognition, Elected Memberships:
2014 – NOAA Restoration Center, Excellence in Restoration Award
2013 – Northwest Scientific Association, Honorary Lifetime Membership Award
2011 – U.S. Department of the Interior, Superior Service Award
Academic and Professional Service:
2015 to Present – Scientific Advisory Board, Mactaquac Aquatic Ecosystem Study
2012 to Present – Science Liaison, Board of Directors, Nature Bridge at Olympic National Park
1998 to Present – Ecological Society of America
2008 to Present – Northwest Scientific Association
2010 to Present – American Fisheries Society
In the News:
Science and Products
The Dam Removal Information Portal is a Web site that serves information about the scientific studies associated with dam-removal projects. It is a visualization tool, including a map and interactive charts, of a dam-removal literature review designed and developed by a working group at the USGS John Wesley Powell Center for Analysis and Synthesis (Bellmore and others, 2015).
Seasonal variation exceeds effects of salmon carcass additions on benthic food webs in the Elwha River
Dam removal and other fish barrier removal projects in western North America are assumed to boost freshwater productivity via the transport of marine-derived nutrients from recolonizing Pacific salmon (Oncorhynchus spp.). In anticipation of the removal of two hydroelectric dams on the Elwha River in Washington State, we tested this hypothesis with a salmon carcass addition experiment. Our study...Morley, S.A.; Coe, H.J.; Duda, J.J.; Dunphy, L.S.; McHenry, M.L.; Beckman, B.R.; Elofson, M.; Sampson, E. M.; Ward, L.
Dam Removal Information Portal (DRIP)—A map-based resource linking scientific studies and associated geospatial information about dam removals
The removal of dams has recently increased over historical levels due to aging infrastructure, changing societal needs, and modern safety standards rendering some dams obsolete. Where possibilities for river restoration, or improved safety, exceed the benefits of retaining a dam, removal is more often being considered as a viable option. Yet, as this is a relatively new development in the history...Duda, Jeffrey J.; Wieferich, Daniel J.; Bristol, R. Sky; Bellmore, J. Ryan; Hutchison, Vivian B.; Vittum, Katherine M.; Craig, Laura; Warrick, Jonathan A.
Influence of species, size and relative abundance on the outcomes of competitive interactions between brook trout and juvenile coho salmon
Resource competition between animals is influenced by a number of factors including the species, size and relative abundance of competing individuals. Stream-dwelling animals often experience variably available food resources, and some employ territorial behaviors to increase their access to food. We investigated the factors that affect dominance between resident, non-native brook trout and...Thornton, Emily J; Duda, Jeff; Quinn, Thomas P
The rapid return of marine-derived nutrients to a freshwater food web following dam removal
Dam removal is increasingly being recognized as a viable river restoration action. Although the main beneficiaries of restored connectivity are often migratory fish populations, little is known regarding recovery of other parts of the freshwater food web, particularly terrestrial components. We measured stable isotopes in key components to the freshwater food web: salmon, freshwater...Tonra, Christopher M; Sager-Fradkin, Kimberly A.; Morley, Sarah A; Duda, Jeff; Marra, Peter P.
Multiscale analysis of river networks using the R package linbin
Analytical tools are needed in riverine science and management to bridge the gap between GIS and statistical packages that were not designed for the directional and dendritic structure of streams. We introduce linbin, an R package developed for the analysis of riverscapes at multiple scales. With this software, riverine data on aquatic habitat and species distribution can be scaled and plotted...Welty, Ethan Z.; Torgersen, Christian E.; Brenkman, Samuel J.; Duda, Jeffrey J.; Armstrong, Jonathan B.
Rapid water quality change in the Elwha River estuary complex during dam removal
Dam removal in the United States is increasing as a result of structural concerns, sedimentation of reservoirs, and declining riverine ecosystem conditions. The removal of the 32 m Elwha and 64 m Glines Canyon dams from the Elwha River in Washington, U.S.A., was the largest dam removal project in North American history.Foley, Melissa M.; Duda, Jeffrey J.; Beirne, Matthew M.; Paradis, Rebecca; Ritchie, Andrew; Warrick, Jonathan A.
1000 dams down and counting
Forty years ago, the demolition of large dams was mostly fiction, notably plotted in Edward Abbey's novel The Monkey Wrench Gang. Its 1975 publication roughly coincided with the end of large-dam construction in the United States. Since then, dams have been taken down in increasing numbers as they have filled with sediment, become unsafe or inefficient, or otherwise outlived their usefulness (1) (...O'Connor, James E.; Duda, Jeff J.; Grant, Gordon E.
Large-scale dam removal on the Elwha River, Washington, USA: river channel and floodplain geomorphic change
A substantial increase in fluvial sediment supply relative to transport capacity causes complex, large-magnitude changes in river and floodplain morphology downstream. Although sedimentary and geomorphic responses to sediment pulses are a fundamental part of landscape evolution, few opportunities exist to quantify those processes over field scales.East, Amy E.; Pess, George R.; Bountry, Jennifer A.; Magirl, Christopher S.; Ritchie, Andrew C.; Logan, Joshua; Randle, Timothy J.; Mastin, Mark C.; Minear, Justin T.; Duda, Jeffrey J.; Liermann, Martin C.; McHenry, Michael L.; Beechie, Timothy J.; Shafroth, Patrick B.
Large-scale dam removal on the Elwha River, Washington, USA: fluvial sediment load
The Elwha River restoration project, in Washington State, includes the largest dam-removal project in United States history to date. Starting September 2011, two nearly century-old dams that collectively contained 21 ± 3 million m3 of sediment were removed over the course of three years with a top-down deconstruction strategy designed to meter the release of a portion of the dam-trapped sediment.Magirl, Christopher S.; Hilldale, Robert C.; Curran, Christopher A.; Duda, Jeffrey J.; Straub, Timothy D.; Domanski, Marian M.; Foreman, James R.
Large-scale dam removal on the Elwha River, Washington, USA: source-to-sink sediment budget and synthesis
Understanding landscape responses to sediment supply changes constitutes a fundamental part of many problems in geomorphology, but opportunities to study such processes at field scales are rare. The phased removal of two large dams on the Elwha River, Washington, exposed 21 ± 3 million m3, or ~ 30 million tonnes (t), of sediment that had been deposited in the two former reservoirs, allowing a...Warrick, Jonathan A.; Bountry, Jennifer A.; East, Amy E.; Magirl, Christopher S.; Randle, Timothy J.; Gelfenbaum, Guy R.; Ritchie, Andrew C.; Pess, George R.; Leung, Vivian; Duda, Jeff J.
A legacy of divergent fishery management regimes and the resilience of rainbow and cutthroat trout populations in Lake Crescent, Olympic National Park, Washington
As a means to increase visitation, early fisheries management in the National Park Service (NPS) promoted sport harvest and hatchery supplementation. Today, NPS management objectives focus on the preservation of native fish. We summarized management regimes of Olympic National Park's Lake Crescent, which included decades of liberal sport harvest and hatchery releases of 14.3 million salmonids...Brenkman, Samuel J.; Duda, Jeffrey J.; Kennedy, Philip R.; Baker, Bruce M.
Guidelines for monitoring and adaptively managing restoration of Chinook salmon (Oncorhynchus tshawytscha) and steelhead (O. mykiss) on the Elwha River
As of January, 2014, the removal of the Elwha and Glines Canyon dams on the Elwha River, Washington, represents the largest dam decommissioning to date in the United States. Dam removal is the single largest step in meeting the goals of the Elwha River Ecosystem and Fisheries Restoration Act of 1992 (The Elwha Act) — full restoration of the Elwha River ecosystem and its native anadromous...Peters, R.J.; Duda, J.J.; Pess, G.R.; Zimmerman, M.; Crain, P.; Hughes, Z.; Wilson, A.; Liermann, M.C.; Morley, S.A.; McMillan, J.; Denton, K.; Warheit, K.
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.