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Adult harbor seal with pup. Photo: Mark Ahlness (CC BY-NC-ND 2.0)

A study published in Marine Mammal Science in June 2020 followed the movements and behavior of rehabilitated harbor seal pups after being released into the Salish Sea. The results suggest that although their movements differ from wild pups that have been weaned, the rehabilitated pups do successfully make the transition.


A tributary of the Nooksack River. Photo courtesy NOAA Fisheries.

The Nooksack River watershed spans part of the border between British Columbia and the State of Washington. In August 2018, the international, multi-agency Nooksack River Transboundary Technical Collaboration Group (TCG) was established to implement a three-year work plan to reduce fecal bacteria concentrations in the Nooksack River watershed. This 2019-2020 TCG annual report summarizes second year project activities and focuses on three of the watershed's transborder sub-basins.


A harbor seal skull in a box

Tiny bone samples show that seals alter their diets as conditions change. The findings could help scientists understand whether seals are contributing to local salmon declines.


Harbor seal photographed by Andreas Trepte. Available through a Creative Commons Attribution Share Alike 2.5 license.

Last month's federal authorization to kill more than 700 sea lions to protect salmon runs along the Columbia River is prompting discussions of similar actions for harbor seals in Puget Sound. But experts say the situations are very different with many unanswered questions. 


Otter crossing street sign. Photo: Joe Gaydos

North American river otters (Lontra canadensis) inhabit inland freshwater environments; however, from Alaska to California they also occur in coastal marine waters where they forage on a variety of marine fish and invertebrates. Little is known about mortality factors in marine-foraging river otters. Among 30 otter carcasses collected in San Juan County, Washington, analysis indicates that car collisions and gunshots were the most common causes of mortality.


We have published a yearly round-up of stories from our magazine Salish Sea Currents. The 2020 edition focuses on the impact of climate change on the Salish Sea and includes a special section on the effect of global warming on infectious diseases in the ecosystem. 


 Wild sockeye salmon in Adams River, BC. Photo: Province of British Columbia (CC BY-NC-ND 2.0) https://flic.kr/p/L6McUY

Few environment problems in the Salish Sea have been studied more than the steep decline in salmon populations. But one potential contributor to these declines has gained less attention. Scientists say infectious disease may play a wider role than previously understood.


Map showing a marine heat wave known as "the blob" which spread across the northeastern Pacific Ocean from 2014 to 2016. Image: Joshua Stevens/NASA Earth Observatory, Data: Coral Reef Watch

Years after the appearance of the devastating marine heat wave known as "the blob," scientists are still working to understand how it has affected the Salish Sea. In some ways, they say, it is like the blob never left.


A kayaker on Puget Sound. Photo courtesy of Washington State Department of Ecology.

A 2020 article in the journal Geographical Review examines the current status of place attachment among Puget Sound residents in connection with environmental stewardship behaviors. The authors challenge often-touted negative perceptions of the region’s newcomers and conclude that residents, new and old, share a strong positive place attachment and sense of pro-environmental stewardship.


Southern resident killer whales. Photo by Candice Emmons/NOAA Fisheries (CC BY-NC-ND 2.0)

The Salish Sea’s endangered southern resident orcas travel freely across the U.S.-Canada border, unconstrained by political boundaries. But while they don’t require passports, they can still face differing policies and conditions as they go back and forth between nations. We look at some of the ways that the United States and Canada compare in their efforts to protect the whales.


The mouth of the Elwha River along the Strait of Juan de Fuca in 2016. Photo by Dave Parks and CWI (with permission). All rights reserved.

The Elwha River has become famous as the site of the largest dam removal project in U.S. history. Several years ago, scientists began knocking down another barrier about a mile away from the river's delta. They removed a large seawall along the Salish Sea shoreline and discovered that sediment from the dam removal had huge benefits for their project.


A surfing harbor porpoise in Burrows Pass, off Fidalgo Island, WA. Photo: Copyright Cindy R. Elliser, Pacific Mammal Research http://pacmam.org/

A paper published in the journal Oceans in 2020 describes cases of prey-related asphyxiation in harbor porpoises along the U.S. West Coast. The findings suggest that a majority of cases involve non-native American shad and that asphyxiation tends to occur more with reproductively active females than other age and sex classes.


Harbor Porpoise (Phocoena phocoena). Bellingham Bay, WA. Photo: Andrew Reding (CC BY-NC-ND 2.0)

A 2020 paper published in Frontiers in Marine Science describes details of the fungal disease Mucormycosis which has caused the death of harbor porpoises, harbor seals and one orca in Puget Sound in recent years. The authors discuss the implications for local marine mammals, specifically the endangered southern resident killer whale population.


Human-built clam gardens are found in the lower intertidal zone and characterized by a level terrace behind a rock wall. Photo: Amy S. Groesbeck

The revival of an Indigenous aquaculture practice has come to the southern Salish Sea. Clam gardens could help First Nations in British Columbia and Washington state address issues of climate change and food sustainability.


Bull kelp floating on the surface of the sea

Identifying kelp stocks that are tolerant of warmer waters could help the Salish Sea’s iconic underwater forests survive climate change.


The new Seattle seawall below the sidewalk at low tide. Photo: Jason Toft/UW

Design innovations at the new seawall along Seattle's waterfront could inspire improvements for other shoreline structures around Puget Sound. They may even encourage broader regulatory changes that enhance habitat for migrating salmon and other species.

 


Pinto abalone. Photo: Taylor Frierson

The pinto abalone was a popular sport catch for divers in the Salish Sea until its numbers plummeted to near extinction. Now, the delicious marine snail is on the endangered species list and the focus of an ambitious hatchery and replanting program. A broad coalition of partners has released more than 20,000 young pintos into the wild with the hope that the population will start to rebound.


Sharon Riggs from Padilla Bay National Estuarine Research Reserve sets a Fukui trap to monitor European green crabs. Photo: Emily Grason/WSG

The state's stay-at-home order has halted much of the field research that would normally be underway in Puget Sound this spring, but a small group of scientists and volunteers have been able to continue their search for an invading marauder along the shoreline. Their work has been classified as critical by the state.


Harbor seals. Photo: Mick Thompson (CC BY-NC 2.0)

A 2020 article in the journal Frontiers in Marine Science looks at harbor seal stranding and necropsy findings in the San Juan Islands to assess age-related stranding trends and causes of mortality. The harbor seal (Phoca vitulina richardii) population in the Salish Sea has been at equilibrium since the mid-1990s. This stable population of marine mammals resides relatively close to shore near a large human population and offers a novel opportunity to evaluate whether disease acts in a density-dependent manner to limit population growth.


The Cougar Creek Fire in Klickitat County, Washington, 2015. Photo: USFS

Historically, the eastern part of the state has seen the largest impacts from fires, but climate change is now increasing the risk west of the Cascades. That could have big implications for many rural communities throughout Western Washington, including the Puget Sound region.


In 2014 and 2019, sea surface temperatures across a broad area warmed to well above average (0 in the middle of the key). On map, 3° C = 5.4° F // Map: NOAA Fisheries

It’s no secret that salmon and other Northwest fish populations are expected to shrink as a result of a warming Pacific Ocean. But a new study suggests that the resulting decline in commercial fishing by 2050 could be twice as great as previously estimated by climate scientists.


Nooksack River. Photo: Ronald Woan (CC BY-NC 2.0) https://flic.kr/p/BR87Hp

The Nooksack River watershed spans part of the border between British Columbia and the State of Washington. In August 2018, the international, multi-agency Nooksack River Transboundary Technical Collaboration Group was established to implement a three-year work plan to reduce fecal bacteria concentrations in the Nooksack River watershed. As a work plan deliverable, the group produced this annual report summarizing first year project activities.


Podcast logo

What do people really mean when they talk about the environment? A new podcast asks regular citizens a simple, but charged question: "What are the environmental challenges that are most important to you?" The answers to that question drive this engaging podcast in sometimes unexpected directions, from the environmental impacts of being homeless, to air quality, to wide-ranging discussions about environmental justice. 


“The Blue Marble,” photo taken by the crew of Apollo 17 in 1972, two years after the first Earth Day

Participants in this year’s Earth Day activities won’t be rallying in large groups, participating in environmental festivals or coming together to clean up the Earth. On the 50th anniversary of Earth Day — April 21st — the environmental movement will be uniquely digital, with many people celebrating from their home computers. [This story is reprinted from the Puget Sound Institute-sponsored blog 'Our Water Ways.']


Beach closed sign. Photo: Washington Department of Ecology

The Pathogens Prevention Reduction and Control agreement between the Environmental Protection Agency and the Washington State Department of Health focuses on the prevention and reduction of pathogen pollution in Puget Sound through the management of human and animal waste. The primary objectives of the agreement include restoring shellfish growing areas, avoiding shellfish closures, and protecting people from disease.