How Acidification, Overfishing and Plastics Threaten the World's Oceans
June 8 is World Oceans Day. It's a fitting time to contemplate humanity's evolving relationship with the source of all life. For much of human history, we've affected marine ecosystems primarily by what we've taken out of the seas. The challenge as we encounter warming temperatures and increasing industrial activity will be to manage what we put into them.
As a top predator, humans from the tropics to the poles have harvested all forms of marine life, from the smallest shrimp to the largest whales, from the ocean's surface to its floor. The staggering volume of fish removed from our waters has had a ripple effect through all ocean ecosystems. Yet the ocean continues to provide food for billions of people, and improved fishing practices in many places, including Canada, are leading to healthier marine-life populations. We're slowly getting better at managing what we catch to keep it within the ocean's capacity to replenish. But while we may be advancing in this battle, we're losing the war with climate change and pollution.
In the coming years, our ties to the oceans will be defined by what we put into them: carbon dioxide, nutrients washed from the land, diseases from aquaculture and land-based animals, invasive species, plastics, contaminants, noise and ever-increasing marine traffic. We once incorrectly viewed oceans as limitless storehouses of marine bounty and places to dump our garbage; now it's clear they can only handle so much.
The Intergovernmental Panel on Climate Change's recent report described how ingredients in the ocean's broth are changing dramatically. Life in the seas is closely linked to factors in the immediate surroundings, such as temperature, acidity or pH, salinity, oxygen and nutrient availability. These combine at microscopic levels to create conditions that favor one form of life over another and emerge into complex ecosystems.
The oceans now absorb one-quarter of the atmosphere's CO2. That's bad news for organisms with calcium carbonate shells that dissolve in acidic conditions. We're witnessing the effects of ocean acidification on shellfish along the West Coast of North America. Earlier this year, a Vancouver Island scallop farm closed after losing 10 million scallops, likely because of climate change and increasing acidity. The U.S. National Oceanic and Atmospheric Administration has also linked oyster die-offs along the Pacific coast to climate change.
While we may be getting better at figuring out how to sustainably harvest crabs, lobsters and sea urchins, we're just starting to investigate whether they can even survive in oceans altered by climate change.
Whales also offer a glimpse into our changing relationship with oceans. From the 17th century until well into the 20th, commercial whaling in Canada left populations severely depleted. Now, our most endangered whales are threatened by industrial activity. The St. Lawrence beluga population, for example, was decimated by hunting until 1979. Today's biggest threats include contaminants, vessel traffic and industrialization, including a proposal to develop an oil port in the heart of their critical habitat.
Although the conservation challenge is daunting, nurturing functioning ecosystems offers hope. Healthy oceans ensure we can continue to enjoy seafood—and they're more resilient to increasing human impacts. If the global fishing industry wants to ensure its survival, it should advocate for marine ecosystem conservation.
By continuing to improve fisheries, protect habitat, carefully control industrial activities and create marine protected areas, we can maintain marine ecosystems that are better able to adapt to the pressures of climate change and other human activities. That's happening on the Pacific North Coast, thanks to a partnership between the B.C. government and First Nations to develop marine plans to guide future ocean uses.
Although there's much to lament about the state of the oceans, I remain inspired by the David Suzuki Foundation's Ocean Keepers and others working to defend our precious coastal waters. With less than five per cent of the oceans explored, we have much left to discover and learn.
As the late American marine biologist, author and conservationist Rachel Carson wrote, "It is a curious situation that the sea, from which life first arose, should now be threatened by the activities of one form of that life. But the sea, though changed in a sinister way, will continue to exist: the threat is rather to life itself."
Written with Contributions from David Suzuki Foundation Senior Research Scientist Scott Wallace.
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An unprecedented climate lawsuit brought by six Portuguese youths is to be fast-tracked at Europe's highest court, it was announced today.
The European Court of Human Rights said the case, which accuses 33 European nations of violating the applicants' right to life by disregarding the climate emergency, would be granted priority status due to the "importance and urgency of the issues raised."
‘Protect Our Future’<p>Cláudia Agostinho (21), Catarina Mota (20), Martim Agostinho (17), Sofia Oliveira (15), André Oliveira (12) and Mariana Agostinho (8) are <a href="https://www.desmogblog.com/2020/09/03/youth-climate-lawsuit-portugal-33-european-countries" target="_blank">bringing the case</a> with nonprofit law firm Global Legal Action Network (<span style="background-color: initial;">GLAN</span>), arguing that none of the countries have sufficiently ambitious targets to cut their emissions.</p><p>Portugal recently sweltered through its <a href="https://www.ipma.pt/pt/media/noticias/news.detail.jsp?f=/pt/media/noticias/textos/resumo-clima-julho-20.html" target="_blank">hottest July in 90 years</a> and has seen a rise in devastating heatwaves and wildfires over recent years due to rising temperatures. Four of the applicants live in Leiria, one of the regions worst-hit by the forest fires that killed more than 120 people in 2017. </p><p>Responding to the development, André Oliveira, 12, said: "It gives me lots of hope to know that the judges in the European Court of Human Rights recognise the urgency of our case." </p><p>"But what I'd like the most would be for European governments to immediately do what the scientists say is necessary to protect our future. Until they do this, we will keep on fighting with more determination than ever."</p>
‘Highly Significant'<p>The decision represents a "highly significant" step, <a href="https://www.glanlaw.org/about-us" target="_blank">GLAN</a> Director Dr. Gearóid Ó Cuinn said in a <a href="https://youth4climatejustice.org/" target="_blank">press release</a>.</p><p>"This is an appropriate response from the Court given the scale and imminence of the threat these young people face from the climate emergency," he added. </p><p>By suing the 33 countries all together, the youths aim to compel these national governments to act more aggressively on climate through a single court order, which would potentially be more effective than pursuing separate lawsuits or lobbying policymakers in each country.</p><p>If successful, the defendant countries would be legally bound not only to ramp up emissions cuts, but also to tackle overseas contributions to climate change including those of their multinational enterprises.</p>
‘Major Hurdle’<p>The <a href="https://youth4climatejustice.org/the-case/" target="_blank" rel="noopener noreferrer">countries targeted</a> include all of the European Union member states as well as Norway, Russia, Switzerland, Turkey, Ukraine and the United Kingdom, none of which are currently aligned with <a href="https://www.ecowatch.com/tag/paris-agreement">Paris agreement</a> target to limit global temperature rise to well below 2 degrees C (3.6 degrees F) and pursue a limit of 1.5 degrees C (2.7 degrees F).<a href="https://climateactiontracker.org/countries/" target="_blank" rel="noopener noreferrer"> </a></p><p><a href="https://climateactiontracker.org/countries/" target="_blank" rel="noopener noreferrer">Climate Action Tracker rates</a> most of Europe as "insufficient" in terms of its emissions reduction policies based on the Paris target, while Ukraine, Turkey and Russia are assessed as "critically insufficient" – meaning they are on track for a warming of 4 degrees C or higher.</p><p>The European Union has pledged to slash its emissions by <a href="https://ec.europa.eu/clima/policies/eu-climate-action/2030_ctp_en" target="_blank" rel="noopener noreferrer">at least 55 percent by 2030</a>. But the Portuguese youth plaintiffs are calling for cuts of at least 65 percent by 2030, a level that <a href="http://www.caneurope.org/energy/climate-energy-targets" target="_blank" rel="noopener noreferrer">European climate campaigners say</a> is necessary to meet the 1.5 degrees warming limit.</p><p> The 33 countries must each respond to the youths' complaint by the end of February, before lawyers representing the plaintiffs will respond to the points of defense. </p><p>"Nothing less than a 65 percent reduction by 2030 will be enough for the EU member states to comply with their obligations to the youth-applicants and indeed countless others," Gerry Liston, legal officer with GLAN, said in a press release.</p><p>"These brave young people have cleared a major hurdle in their pursuit of a judgment which compels European governments to accelerate their climate mitigation efforts."</p><p><span></span><em>Reposted with permission from <a href="https://www.desmogblog.com/2020/11/29/court-advances-landmark-youth-climate-lawsuit-against-33-european-nations" target="_blank">DeSmog</a>. </em></p>
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