All Articles

Steelhead (Oncorhynchus mykiss). Photo: Eric Engbretson, U.S. Fish and Wildlife Service

Are diseases playing a role in salmon decline?

Chinook, coho and steelhead populations in Puget Sound have declined dramatically over the past 30 years. In some cases, counts of fish returning to the rivers are just a tenth what they were in the 1980s. While many possible causes of this decline are under consideration, some researchers are focusing on the combined effects of predators and disease. This article continues our coverage of the

Mist from the breath of killer whales is collected at the end of a long pole then tested for dozens of different types of bacteria. Photo: Pete Schroeder

Concerns rise over potential impacts of disease on the ecosystem

From orcas to starfish to humans, disease affects every living creature in the ecosystem. Scientists are increasingly alarmed by its potential to devastate already compromised populations of species in Puget Sound.  

Fig 1. The six projects assessed are located on both sides of the Canadian / United States border, which bisects the Salish Sea and its watershed.

Evaluating threats in multinational marine ecosystems: A Coast Salish first nations and tribal perspective

A 2015 paper in the journal PLoS ONE identifies ongoing and proposed energy-related development projects that will increase marine vessel traffic in the Salish Sea. It evaluates the threats each project poses to natural resources important to Coast Salish first nations and tribes.

Eyes Over Puget Sound: Surface Conditions Report - 2015 Year Review

Eyes Over Puget Sound: Surface Conditions Report - 2015 Year Review

The year 2015 in pictures: Jellyfish patches persisted through the entire year in response to the exceptionally warm water caused by the Blob. Sediment loads are high as snow melts fast in the winter of 2015. Unexpected phytoplankton species occur in some bays in spring. Noctiluca, jellyfish and macro-algae appear in high numbers when rivers drop to record-low flows in early summer. Low river
Birch Bay. Photo by Jeff Rice

Birch Bay characterization and watershed planning pilot – taking action

A 2015 report from the Whatcom Conservation District and Whatcom County describes a pilot watershed characterization study focusing on the Terrell Creek and Birch Bay areas. The report and related appendices are available for download. 

report cover: Analysis of  Effective Regulation and Stewardship Findings

A review of Puget Sound marine and nearshore grant program results, Part 1

A 2015 report from the University of Washington Puget Sound Institute summarizes and reviews 14 EPA-funded projects focusing on Puget Sound's marine and nearshore environments. The projects were conducted between 2011-2015 with support from the EPA's National Estuary Program.

Eyes Over Puget Sound: Surface Conditions Report – December 14, 2015

Eyes Over Puget Sound: Surface Conditions Report – December 14, 2015

As coastal and regional conditions gradually normalize in response to a fading Blob and increased rain, the big question remains. Will the snow in the mountains stay there or come down prematurely and lower salinity in Puget Sound like last winter? Cascade snowpack is currently below normal. The El Niño at the equator is still brewing! Major rivers transport large amounts of suspended sediments

Visual representation of Human Wellbeing domains for marine policy.

A holistic framework for identifying human wellbeing indicators for marine policy

A 2015 paper in the journal Marine Policy identifies six domains of human wellbeing related to the natural environment. The domains were developed based on case studies in Washington's Hood Canal and Olympic Coast regions.

Aerial view of Budd Inlet showing a wastewater treatment plant with circular clarifiers, industrial waterfront facilities, marinas, and forested shoreline with mountains in the background.

Report evaluates pathways to reduce nutrient pollution in Puget Sound

A 2025 report from the University of Washington Puget Sound Institute identifies and evaluates potential strategies for addressing environmental concerns over nutrients and dissolved oxygen in Puget Sound.