Salmon have been swimming in Pacific Northwest waters for at least seven million years, as indicated by fossils of large saber-tooth salmon found in the area. During that time, they’ve been a key species in intricate, interconnected coastal ecosystems, bringing nitrogen and other nutrients from the ocean and up streams and rivers to spawning grounds, feeding whales, bears and eagles and fertilizing the magnificent coastal rainforests along the way. For as long as people have lived in the area, salmon have been an important food source and have helped shape cultural identities.

But something is happening to Pacific coast salmon. This year, B.C.’s sockeye salmon run was the lowest in recorded history. Commercial and First Nations fisheries on the world’s biggest sockeye run on B.C.’s longest river, the Fraser, closed. Fewer than 900,000 sockeye out of a projected 2.2 million returned to the Fraser to spawn. Areas once teeming with salmon are all but empty.

Salmon define West Coast communities, especially Indigenous ones. The West Coast is a Pacific salmon forest. Today, salmon provide food and contribute to sustainable economies built on fishing and ecotourism. West Coast children learn about the salmon life cycle early in their studies.

Salmon migrations, stretching up to 3,000 kilometres, are among the world’s most awe-inspiring. After spending adult lives in the ocean, salmon make the arduous trip up rivers against the current, returning to spawn and die where they hatched. Only one out of every thousand salmon manages to survive and return to its freshwater birthplace.

So what’s going wrong? Climate change is amplifying a long list of stressors salmon already face. Sockeye salmon are sensitive to temperature changes, so higher ocean and river temperatures can have serious impacts. Even small degrees of warming can kill them. Low river flows from unusually small snowpacks linked to climate change make a tough journey even harder.

Oceans absorb the brunt of our climate pollution — more than 90 per cent of emissions-trapped heat since the 1970s. Most warming takes place near the surface, where salmon travel, with the upper 75 metres warming 0.11 C per decade between 1971 and 2010. Although ocean temperatures have always fluctuated, climate change is lengthening those fluctuations. A giant mass of warmer-than-average water in the Pacific, known as “the blob”, made ocean conditions even warmer, with El Niño adding to increased temperatures. Salmon have less food, and face new predators migrating north to beat the heat.

Beyond creating poor environmental conditions for salmon, climate change increases disease risks. Warm conditions have led to sea lice outbreaks in farmed and wild salmon, and a heart and muscle inflammatory disease has been found in at least one farm. Scientists researching salmon movement through areas with farms are finding wild fish, especially young ones, with elevated parasite levels. Diseases that cause even slight deficiencies in swimming speed or feeding ability could make these marathon swimmers easy prey.

Some question whether wild salmon will remain a West Coast food staple. For the first time, the Monterey Bay Aquarium’s Seafood Watch program has advised consumers to avoid buying chinook and coho from four South Coast fisheries. Researchers also predict changing conditions will drive important food fish north by up to 18 kilometres a decade.

Disappearing salmon don’t just affect humans but all coastal ecosystems and wildlife. Eighty-two endangered southern resident killer whales depend on chinook salmon to survive. As chinook stocks go down, the likelihood that these whales could become extinct goes up.

Although the federal government has committed to implement recommendations from Justice Bruce Cohen’s inquiry into Fraser River sockeye and to follow the Wild Salmon Policy, reversing this dire situation will take widespread concerted and immediate action. A weak provincial climate plan that fails to meet emissions targets and acceptance of new ocean-based fish farm applications won’t help wild salmon. We need to move fish farms out of the water and onto land.

Salmon are resilient and have survived ice ages and other challenges over millions of years. They’ve survived having their streams paved over. They’ve survived toxins dumped into their environments. The question is, can they — and the ecosystems that depend on them — survive climate change and fish farms and all the other stressors humans are putting on them?

Written with contributions from David Suzuki Foundation senior communications specialist Theresa Beer.

Learn more at www.davidsuzuki.org.

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More than 100 scientists and economists "concerned about climate change and its impacts" signed an open letter Monday calling on U.S. President Barack Obama and Secretary of State John Kerry to reject the proposed Keystone XL pipeline project, which would transport oilsands crude from Alberta to refineries on the Gulf Coast, mainly for export.

The signers "urge [President Obama and Secretary Kerry] to reject the Keystone XL tar sands oil pipeline as a project that will contribute to climate change at a time when we should be doing all we can to put clean energy alternatives in place."

The letter, signed by prominent leaders in science and economics, is the latest addition to an already strong and growing opposition to the Keystone XL project in the U.S., including 2 million public comments sent to President Obama and a previous open letter signed last month by over 200 business leaders and entrepreneurs asking for the rejection of the pipeline.

The signers write:

"As you both have made clear, climate change is a very serious problem. We must address climate change by decarbonizing our energy supply. A critical first step is to stop making climate change worse by tapping into disproportionately carbon-intensive energy sources like tar sands bitumen. The Keystone XL pipeline will drive expansion of the energy-intensive strip-mining and drilling of tar sands from under Canada's Boreal forest, increasing global carbon emissions. Keystone XL is a step in the wrong direction."

The signers remind President Obama and Secretary Kerry of their previous commitments to combating climate change, and reiterate that "evidence shows that Keystone XL will significantly contribute to climate change."

The letter emphasizes that fuels from oilsands crude result in higher greenhouse gas (GHG) emissions than fuel from conventional oil. The Keystone XL pipeline would open up overseas markets for higher-polluting oilsands fuels, causing "a sizeable expansion of tar sands production and also an increase in the related greenhouse gas pollution."

President Obama and Secretary Kerry have yet to make a final decision on Keystone XL. The U.S. State Department's Final Supplemental Environmental Impact Statement (FSEIS) on the pipeline, released in January, has been criticized by environmental groups as flawed and narrow in scope.

As the open letter observes, "the State Department environmental review chose an inconsistent model for its 'most likely' scenarios, using business-as-usual energy scenarios that would lead to a catastrophic six degrees Celsius rise in global warming," a potential rise that, the signers note, "has no place in a sound climate plan."  

A decision to reject the Keystone XL pipeline, write the signers, would be one "based on sound science," given the 8.4 billion metric tons of CO2e emissions the pipeline could produce over its expected 50-year lifespan.

"These are emissions that can and should be avoided with a transition to clean energy," states the letter.

The signers in the letter include Nobel Prize winners Dr. Philip W. Anderson and Dr. Kenneth J. Arrow, environmental activist and broadcaster Dr. David Suzuki, several authors for the United Nations Intergovernmental Panel on Climate Change assessment reports, Fellows of the American Academy for the Advancement of Science (AAAS) including Dr. James McCarthy and Dr. Richard Norgaard, and Fellows of the Royal Society of Canada (FRSC) including Dr. Mark Jaccard, Dr. Lawrence Dill, among numerous other lauded scientists and economists.

The public can add their voice against the Keystone XL pipeline to an online petition hosted by the National Resource Defence Council (NRDC).

Image Credit: maisa_nyc / Flickr

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