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The history of DEMO: An experiment in regeneration harvest of northwestern forest ecosystems. Northwest Science 73:3-11.

2024 Annual meeting!

We are delighted to announce that the 94th annual meeting of the Northwest Scientific Association

will take place from

MAY 20-23, 2024


The 2024 meeting will mark NWSA's return to the city that hosted its 1st annual meeting, in April 1924.


  • May 20th: Evening reception
  • May 21st - 22nd: Scientific sessions
  • May 23rd: Field trips

We invite you to save the dates and stay tuned for more information as we continue to plan the event. Thanks to Gonzaga University and our local host, John Orcutt.

See you in Spokane, 2024!


Mission Statement: We are a network of professional and amateur scientists from diverse disciplines that provides support and a forum for research and education relevant to the environment and resource management of northwestern North America. To accomplish our mission, the association publishes a quarterly journal, convenes an annual scientific meeting, and awards student research grants.

Since 1923, the NWSA has existed for the purpose of promoting scientific research and disseminating scientific knowledge. Our annual meetings are held throughout the Pacific Northwest and provide an opportunity to share recent findings and foster collaborative interactions.

NWSA publishes four issues of Northwest Science each year. A peer reviewed journal, Northwest Science is an outlet for original papers on wide ranging topics in the natural sciences, including anthropology, aquatic biology, botany, ecology, fisheries, forestry, geology, geography, hydrology, soils, wildlife biology, and zoology. The geographic scope of Northwest Science is the northwestern United States and western Canada.


Members should click here to access Northwest Science on
Click here to access abstracts of “Accepted articles in press” for the upcoming issue of Northwest Science.

Northwest Science 96(1&2)
Table of Contents


Three-Year Effects of Crown Removal by Clipping or Burning on Beargrass (Xerophyllum tenax) Size and Biomass – David H. Peter, Timothy B. Harrington

Northwest Science 95(3&4)
Table of Contents


Isolation by Distance and Proximity to Urban Areas Affect Genetic Differentiation among Collections of English Sole (Parophrys vetulus, Family Pleuronectidae) in the Northeastern Pacific Ocean and Salish Sea – Gary A. Winans, Jon Baker, Lyndal Johnson, Ingrid B. Spies, James E. West

Population Characteristics of Brook Trout in Idaho Streams and Alpine Lakes – Curtis J. Roth, Patrick A. Kennedy, Kevin A. Meyer

Effects of Post-Fire Timber Harvest and Mastication on Shrub Regrowth in the Sierra Nevada Mountains: A Lake Tahoe Case StudySusan D. Kocher, Daylin Wade

Status of Three Large Populations of Western Pearlshell (Bivalvia: Margaritiferidae: Margaritifera falcata) in the Willamette River Basin, Oregon – Travis Williams, Celeste A. Searles Mazzacano

Distribution, Relative Abundance, and Length of Sculpins in the Elwha River Watershed Following the Removal of Two Hydroelectric Dams – Roger A. Tabor, Jeffery R. Johnson, Roger J. Peters, Rebecca Mahan, Michael L. McHenry, Samuel J. Brenkman, George R. Pess, Todd R. Bennett, Martin C. Liermann

Spatiotemporal Responses of Wintering Bald Eagles to Changes in Salmon Carcass Availability in the Pacific Northwest – Ethan S. Duvall

Hymenopteran Pollinators Prefer Yellow Flowers to Red Ones in Scotch Broom (Cytisus scoparius (L.) Link), But Not Enough to Negatively Affect Plant Fitness – Robert F. Bode, Maria Breznau, Kaylen Furut

Cellobiase Activity as an Indicator of Fungal Decay in the Wood of Woodpecker Nest Cavities in the Pacific Northwest. – Jeffrey M. Kozma, Teresa J. Lorenz, Jerred Seveyka

How Long Can Dead Fish Tell Tales? Effects of Time, Tissue, Preservation, and Handling on Genotyping Success – David A. Venditti, Craig A. Steele, Brian S. Ayers, Joshua L. McCormick


Case Report of Traumatic Rib Fracture in Mammoth from Frenchman Hills–Tonnemaker Mammoth Site, Grant County, Washington – George V. Last, Katherine Newhall-Perry, Rosalie L. Faubion, Neil L. Mara, Bax R. Barton

Book Reviews 

Of Megafloods and Photographs – Richard Waitt

Edible, But is it Palatable? – David Peter


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