Taking Care of the Little Things

By Bob Friel

Everybody loves the Salish Sea’s killer whales, playful porpoise, and puppy-like seals. Birders flock here to see such feathered favorites as rhinoceros auklets, tufted puffins, and marbled murrelets. And no fish anywhere is as exalted as our Chinook, the king salmon, appreciated as sport fish, table fare, and cultural icon.

But where’s the love for the sand lance? Who here is a herring hugger?

Forage fish are the Rodney Dangerfields of the sea—they get no respect. Even that catchall name for the many different species of small schooling fish suggests they exist only to serve as self-propelled snacks. However, without these little fish that feed at the base of the food web, converting plankton into silvery packets of energy, there wouldn’t be any of those other more charismatic critters. No auklets, no puffins, and no king salmon. And without king salmon, of course, the Southern Resident Killer Whales disappear.

It’s impossible to exaggerate the importance of forage fish to the overall health of the Salish Sea. Unfortunately the research and, where needed, recovery work on these vital species hasn’t been commensurate with their value. So SeaDoc is investing in forage fish by funding two new projects, one on sand lance and the other on herring.

With everything from seabirds to sea lions hunting them, Pacific sand lance (Ammodytes personatus) have evolved an ingenious survival strategy. Whenever they’re not grazing on plankton in the water column, they tuck themselves into the sandy seabed to hide from predators and wait for their next feeding opportunity.

We know that Pacific sand lance nourish myriad crucial Salish Sea species, and a recent Northwest Straits Initiative / SeaDoc study showed smaller sand lance are widely distributed in our near shore waters year round, with population peaks in the summer. But we still don’t know the answers to some basic questions about these fascinating little fish, such as: Where exactly do they like to hide? How many of them are there? And, are their populations stable?

Now, we’re funding a new project that will use underwater video and a bottom-biting oceanographic tool called a Van Veen Sampler to ascertain the exact types of sea floor where the sand lance prefer to bury (too silty and they can’t breathe; too gravelly and they can injure themselves while tunneling). Co-investigators Drs. Cliff Robinson (Pacific Wildlife Foundation / University of Victoria) and Doug Bertram (Environment and Climate Change Canada) and their team will precisely map those habitats, build an improved model for predicting seafloor use by sand lance, and re-sample study sites monthly to look at population health and seasonal variability.

Compared to our knowledge base on sand lance, we know quite a bit about Salish Sea herring. As the foundational forage fish—the energy source that spins a huge part of our food web—healthy herring populations are considered so critical that the Puget Sound Partnership lists them as one of our “vital signs.” Simply checking the dwindling numbers of many herring stocks on the Washington State side of the Salish Sea, tells you that the ecosystem is in trouble.

The herring stock that spawns at Cherry Point, site of the state’s largest oil refinery, was once the most prolific in all of Puget Sound. Since 1973, the Cherry Point population has crashed by more than 93 percent. While this stock and others on the U.S. side are faltering, in British Columbia's Strait of Georgia they’re currently booming. With your support, our research is designed to find out reasons why some stocks are hurting and how to recover them as soon as possible.

Helping herring will never be as sexy as salmon conservation, but it’s every bit as important to the health of our ecosystem. So SeaDoc is jumpstarting the recovery process for Puget Sound herring by funding a joint US / Canadian team co-led by Drs. Tessa Francis (Puget Sound Institute, UW Tacoma) and Dayv Lowry (WA Department of Fish and Wildlife) that will act as the nexus for relevant data and expertise. This project will determine the specific threats harming the southern herring populations, assess all of the stocks, and evaluate the state of the science, policies, and ongoing recovery efforts in order to ultimately produce a comprehensive Salish Sea herring conservation and management plan.

Thanks to your support, both new projects continue the SeaDoc Society’s mission to provide the science that’s helping to heal our Salish Sea.

This holiday season, show some love to the lowly forage fish. Go ahead: hug a herring.

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Banner photo: Rhinocerus auklet with sand lance. Courtesy of Phil Green, from The Nature Conservancy.

When it comes to at-risk species, we're bailing a leaky boat

By Bob Friel

Every two years, SeaDoc scientists catalog all of the Salish Sea species that are listed as endangered or otherwise considered at-risk by the four governmental bodies charged with protecting the inland sea’s wildlife. Before we launched our biennial study back in 2002, no one was comparing the lists maintained at the U.S. federal level (via NOAA and the US Fish and Wildlife Service), locally by Washington State agencies, and across the border by both the province of British Columbia and the Canadian federal government.

Surprisingly, each of the four lists is very different, making SeaDoc’s Marine Species at Risk compilation an invaluable tool for ecosystem managers on both sides of the border. According to Cecilia Wong and Michael Rylko of Environment Canada and the US Environmental Protection Agency, respectively, and co-chairs of the Transboundary Ecosystem Indicators Project, SeaDoc’s work “provides a unique, long-term perspective on the Salish Sea, and fosters multilateral collaboration toward restoration and conservation.”

Since our study looks at the status of fish, mammals, birds, and invertebrates throughout the Salish Sea, top to bottom, it offers a “state of the sea” view on the entire ecosystem relative to recovery efforts. Unfortunately, our most recent report shows the continuation of a troubling trend.

First the good news: Five natives were removed from the list, including Pacific ocean perch, the Georgia Strait population of coho salmon, the belted kingfisher, cackling goose, and snowy owl. The bad news is that over the last two years, 12 more animals, including the longfin smelt, gooseneck barnacle, and black-legged kittiwake, were added to the list, bringing the total to 125 species of concern. Disturbingly, this is the eighth straight study with more species hitting the list than graduating off it. As SeaDoc co-authors Jacquelyn Zier and Joe Gaydos conclude, this negative movement “suggests ecosystem recovery efforts are being outpaced by ecosystem decay.”

Listing species does bring the animals and their critical habitats more attention, but when it comes to restoring the overall health of the Salish Sea, these ever-expanding lists show that we’re still trying to bail out a leaking boat.

To see the Health of the Salish Sea Report where the SeaDoc Society’s Marine Species at Risk study is used by the U.S. Environmental Protection Agency and Environment Canada as a transboundary indicator, visit the EPA website.

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Banner photo: while the Georgia Strait population of Coho salmon has graduated from our Species At Risk list, 12 more species have been added. Courtesy of U.S. FWS/Pacific Region.

Scientists who showed how copper damages salmon’s sense of smell receive prestigious award

Photo by Ingrid Taylar

It’s always beautiful when scientific discovery leads directly to concrete changes in environmental policy.

Such was the case with a team of scientists who will be honored by the SeaDoc Society on Friday for having demonstrated how copper damages salmon’s sense of smell. Their work led to legislation that removed copper from car brake pads in Washington State.

The team, led by NOAA scientists Drs. Jenifer McIntyre, David Baldwin, and Nathaniel Scholz, helped pave the way for the legislation, which will benefit salmon recovery by reducing the loadings of toxic metals to the Salish Sea by hundreds of thousands of pounds each year.

The award will be presented at the Salish Sea Ecosystem Conference, which starts April 13 in Vancouver, B.C. Close to 1,000 scientists and conservationists from both sides of the U.S.-Canada border are expected to convene for three days to discuss recovery of the Salish Sea.

Copper is a major constituent of conventional brake pads and is released with other metals in a fine dusting each time a car slows. This metal is then washed into streams, rivers and the Salish Sea by rainfall. Copper has long been known to disrupt the sense of smell in fish, but the consequences of transient, low-level copper exposures for salmon were unknown when the NOAA team began studying this problem in the early 2000s.

The prize-winning scientists and their colleagues first showed that copper blocks salmon's ability to smell well during the short length of a typical stormwater runoff event.

The team then demonstrated that copper-caused damage to the olfactory (smell) system actually made juvenile salmon more vulnerable to predators. Salmon attacked by predators release a smell from torn skin, which acts as an alarm signal for other salmon to evade attack. Salmon exposed to copper at levels expected during a storm event failed to respond to this alarm cue, causing higher rates of mortality in predator-prey encounters.

The scientists addressed several other natural resource management concerns, including the applicability of the new findings across salmon species and how different water conditions influence how much copper is available to injure the salmon's olfactory system.

The SeaDoc Society's Salish Sea Science Prize comes with a $2,000 cash prize. It is bestowed biennially to recognize a scientist or group of scientists whose work has resulted in the demonstrated improved health of fish and wildlife populations in the Salish Sea. It is given in recognition of, and to honor the spirit of the late Stephanie Wagner, who loved the region and its wildlife.

The SeaDoc Society is about people and science healing the sea. It funds and conducts marine science and uses science to improve management and conservation in the Salish Sea. It is a program of the Karen C. Drayer Wildlife Health Center, a center of excellence at the UC Davis School of Veterinary Medicine.

• More information on past winners of the Salish Sea Science Prize.
• More information on the NOAA Copper team.