Category: Blog topics

Latest Puget Sound marine waters overview now available

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Announcement from the Puget Sound Ecosystem Monitoring Program: Today, the Puget Sound Marine Waters Work Group of the Puget Sound Ecosystem Monitoring Program released the eleventh annual report on marine water conditions in Puget Sound. The report combines a wealth of data from comprehensive monitoring programs and provides a concise summary of what was happening in Puget Sound’s marine waters during 2022. It covers areas such as climate and weather, river inputs, seawater temperature, salinity, nutrients, dissolved oxygen, ocean acidification, phytoplankton, biotoxins, bacteria and pathogens, shellfish resources, and more. The […]

GAO report calls for strengthening of regulations on nonpoint source pollution

A carcass of a female coho salmon affected by the toxic chemical 6PPD-quinone in stormwater runoff in Seattle's Longfellow Creek. This salmon died before spawning, retaining nearly 100 percent of its eggs. Source: Tiffany Linbo, National Oceanic and Atmospheric Administration. | GAO-24-105687
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By Sarah DeWeerdt A new report by the nonpartisan Government Accountability Office (GAO) is renewing calls to strengthen Clean Water Act protections against nonpoint source pollution such as stormwater and agricultural runoff.  The recommendation echoes findings made by the GAO in 2013 when it called for Congress to revise “largely voluntary” regulations for nonpoint pollution sources that wash into waterways such as Puget Sound. The report, which focuses on the link between Puget Sound water quality and salmon recovery, also criticizes a series of missed deadlines by the Washington State Department of […]

Puget Sound ecosystem holding on, but recovery remains uncertain, says latest status report

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Efforts to restore ecological health to Puget Sound have largely failed to meet recovery goals, yet fish and wildlife populations are still hanging on, according to a new report that describes many struggling populations as neither increasing nor decreasing to a significant extent. The latest State of the Sound report, released last week by the Puget Sound Partnership, reveals the ongoing difficulty of recovering the Puget Sound ecosystem in the face of rapid population growth, climate change and a legacy of pollution and habitat damage. Yet the report, produced every […]

A no-death census year for Puget Sound’s orcas, with observations about a recent shift to more female births

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For the first time since Census Year 1993, no deaths were reported this year among the Southern Resident killer whales, which frequent Puget Sound, according to the official census report. Two new births were reported among the whales, increasing the population from 73 to 75. I would also like to share some potentially hopeful information about what appears to be a shift in the male-to-female ratio at birth. While worthy of note, the finding of no deaths may be more a coincidence of the census calendar than a suggestion that […]

What may be the nation’s largest estuary seems hidden in plain sight for many people

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What is the largest estuary in the United States? This is a question loaded with confusion and open to interpretation, as you will soon see. Before we get to the likely answer — which may surprise you — let me share a few authoritative views on the subject: Chesapeake Bay Foundation: “Chesapeake Bay is the largest estuary in the United States and the third largest in the world. It is about 200 miles long and holds more than 18 trillion gallons of water.” U.S. Rep. Derek Kilmer of Washington state: […]

2022 Salish Sea toxics monitoring synthesis: A selection of research

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A new report from the Puget Sound Ecosystem Monitoring Program takes a comprehensive look at some of the greatest dangers posed by toxic chemicals in the Salish Sea. The report was produced with support from the UW Puget Sound Institute, and brings together recent findings on PCBs, CECs, PFAS, 6PPD-Q, and other toxics of concern. It represents a compilation of activities from almost 50 groups in both the United States and Canada. Read it to find out how rogue chemicals are affecting the health of the ecosystem. Overview The Puget Sound Ecosystem Monitoring Program […]

Warm ocean waters work their way into Puget Sound

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Unusually warm waters in the Pacific Ocean — now pushing up against the Washington coast — are keeping oceanographers on alert for changes that could reverberate through the food web, potentially affecting fish, birds and marine mammals in coastal waters and in Puget Sound. Rising ocean temperatures may be related to recent sightings of warm-water fish not usually seen in the Northwest, including a bluefin tuna that washed up on Orcas Island and large schools of mackeral observed in the Strait of Juan de Fuca. Worrisome levels of domoic acid, […]

Salish Sea Science Roundtable begins in October

Image courtesy of Welch et al.
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While there are often opportunities to go deep in our respective fields, breakthroughs can come from unexpected connections and interdisciplinary discussions. The Salish Sea Science Roundtable is a virtual monthly seminar inspired by just that. UW Puget Sound Institute is co-convening the roundtable with several organizations, including Fisheries and Oceans Canada. Each month we’ll connect to share emerging science that’s shaping Salish Sea recovery and sustainable development, reconnect with colleagues in different fields, and enjoy thought-provoking discussions. We hope you’ll join us virtually the first Tuesday of each month from 12:30-1:30 […]

Two new baby orcas with no deaths over the past year could make for a remarkable census

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This year’s census for the Southern Resident killer whales apparently will document two new calves but no deaths for the 12-month period ending July 1. According to my unconfirmed records, this will be the first time in nearly 30 years that no deaths will be reported in the annual census update. Consequently, the overall population for the three orca pods rises from 73 in 2022 to 75 in 2023. These numbers won’t be official until the Center for Whale Research submits its annual report to the federal government sometime before […]

Salish Sea Model tracks pollution, currents and climate change

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This article is the latest in a series about computer models and their uses within the Puget Sound ecosystem. Today, we look at the Salish Sea Model, one of several models in the region helping to predict water circulation, water quality and food-web relationships. Read the full series: Where and how the water moves The waters of Puget Sound contain complex chemical mixtures arising from natural and human sources. The waters are blended and pushed around by currents and other physical forces, creating conditions that vary from place to place. […]

Prey and predators create varying life-or-death conditions for salmon, as shown with Atlantis model

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This article is the latest in a series about computer models and their uses within the Puget Sound ecosystem. As scientists uncover more and more information about a particular ecosystem, computer modelers are often eager to put that raw data to good use in complex models tuned to local conditions. One highly acclaimed model, called Atlantis, has been applied to more than 40 ecosystems around the world. In Puget Sound, Atlantis has been used to study the food web to determine whether salmon are more threatened by predators or by […]

Examining the link between low summer stream flows and climate

Low stream flows in a tributary of the Skykomish River. Photo by Jeff Rice.
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A 2023 paper in the Journal of the American Water Resources Association says future low flows in Puget Sound streams could be lower than are projected by climate models that do not reliably account for multidecadal climate variation. The paper is co-authored by Nicholas Georgiadis and Joel Baker of the Puget Sound Institute. When rains finally returned to Puget Sound last fall, they provided welcome relief for spawning salmon. Drought conditions had left streams at record lows, causing many creeks to become dangerously warm for fish, and in some cases […]