All Articles

Early morning meal. Photo: jdegenhardt (CC BY-NC-ND 2.0) https://www.flickr.com/photos/jdegenhardt/2771107305

Food web connections beyond the marine areas of Puget Sound

Food webs are natural interconnections of food chains and depict what-eats-what in an ecological community. While Puget Sound represents a specific food web, the organisms that reside within that web often travel outside the region. In this way, one community's food web can be drastically affected by a change in a neighboring ecosystem.

Dead salmon. Photo: Boris Mann (CC BY-NC 2.0) https://www.flickr.com/photos/boris/3037705761

Transfer of nutrients in the ecosystem

Decaying organic matter plays an important role in marine ecosystems. 

Puget Sound. Photo: S.N. Johnson-Roehr (CC BY-NC 2.0) https://www.flickr.com/photos/snjr22/4095840433

Water and nutrient circulation in Puget Sound

Complex physical processes such as hydrology, nutrient cycling, and sediment transport are linked to water circulation patterns in Puget Sound. 

Ballard Locks from the air. Photo: Jeff Wilcox (CC BY-NC 2.0) https://www.flickr.com/photos/jeffwilcox/4805933588

Will Ballard Locks withstand a major earthquake?

For close to 100 years, Seattle's Ballard Locks has been one of the region's busiest waterways, drawing major boat traffic along with millions of tourists. But as it prepares to celebrate its centennial, the aged structure is also drawing the concern of engineers. They worry that an earthquake could cause the locks to fail, draining massive amounts of water from Lake Washington and Lake Union. In

Returning sockeye salmon packed gill-to-gill in the viewing windows at the Ballard Locks fish ladder. Photo: Ingrid Taylar (CC BY-NC 2.0) https://www.flickr.com/photos/taylar/7511895940

Salmon live in a topsy-turvy world upstream of the Ballard Locks

Chinook, coho and sockeye salmon, along with steelhead trout, live in the Lake Washington watershed and navigate a treacherous route through the Ballard Locks on their way to Puget Sound.

Waves crashing on the Puget Sound Photo: MikeySkatie (CC BY-SA 2.0) https://www.flickr.com/photos/mikeyskatie/5473869676

Climate and ocean processes

This overview discusses the processes that control ocean and climate characteristics. Topics include atmospheric forcing, precipitation patterns, oscillation trends, coastal upwelling, and climate change.

2003 Seattle Marathon - Seward Park Photo: J Brew (CC BY-SA 2.0) https://www.flickr.com/photos/brewbooks/1282527696

Cleaning up Lake Washington

Lake Washington was heavily contaminated by untreated sewage until extensive pollution controls by the city of Seattle. 

Water Resource Inventory Areas (WRIA). Map: Kris Symer. Data source: WAECY.

Geographic boundaries of Puget Sound and the Salish Sea

The boundaries of Puget Sound and the Salish Sea are not always consistently defined by scientists and government agencies. This article clarifies the distinctions between oceanographic and watershed-based definitions of these geographic areas. 

Bear eats salmon. Photo: Robert Voors (CC BY-NC-ND 2.0) https://www.flickr.com/photos/robert_voors/1303192433

Food webs

The health of an ecosystem is tied closely to the health of its food webs. This article provides an overview of the concept, origin, and characteristics of a food web and how predator and prey relationships are shaped in the Salish Sea.  

The Puyallup River outside Orting, WA. Photo: Lindley Ashline (CC BY-NC-ND 2.0) https://www.flickr.com/photos/91625873@N04/22035924720

Land cover conversion and ecosystem decline

Land cover conversion through human development was listed as a leading cause of ecosystem decline in the 2014 Puget Sound Pressures Assessment, a document supported by the Environmental Protection Agency and prepared by more than 60 of the region's scientists.