Blog Tags: Ocean Acidification
As world leaders prepare for international climate change negotiations next week in Durban, South Africa, a new study out this week depicts the widespread threats that climate change presents for marine fisheries.
The bottom line? Emissions from the burning of fossil fuels are presenting very long-term if not irreversible threats for the oceans.
Economists and top fisheries scientists at the University of British Columbia published a paper on Sunday in the journal Nature Climate Change that outlines the many challenges fisheries face from climate change, and how this can impact the global economy and hundreds of millions of lives.
Global marine fisheries are underperforming, mainly from rampant overfishing, but climate change also creates several serious threats to the future productivity of fisheries. These chemical and physical changes linked to climate change such as decreased oxygen levels, changes in plankton communities and plant growth, altered ocean circulation and increased acidity can disrupt the basic functioning of marine ecosystems and thwart any potential recovery of global fish stocks.
The study outlines how impacts can scale up from changing ocean conditions to the global economy, but the authors note that the true scope of impacts to employment are hard to predict.
Guest blogger Jon Bowermaster is a writer and filmmaker. In this post, Jon reports from the Maldives on the effects of climate change -- and marine protection -- on the country's waters.
There are few places on the planet as remote as the Maldives. Landfall is a thousand miles away from much of the long string of 1,200 islands, most of which are little more than thin, uninhabited strips of sand. Diving into the heart of a Maldivian lagoon, it is easy to imagine you are alone in a distant paradise.
Yet when I did just that a few days ago, in the heart of the Baa Atoll — 463 square miles of aquamarine Indian Ocean recently named a UNESCO Biosphere Reserve — something didn’t feel, or look, quite like paradise.
The ocean, though jaw-droppingly beautiful, was a bathtub warm 86 degrees F. Diving to its shallow floor it was quickly clear that the realm below sea level here has been badly impacted in recent years by a combination of man and Mother Nature and resulting fast-warming temperatures.
The coral reefs of the Maldives were first badly damaged in 1998, when shifting ocean patterns associated with El Niño raised sea level temps above 90 degrees. The result then was that 70 to 90 percent of the reefs surrounding the Maldives 26 atolls were badly “bleached,” the warm temperatures killing off the symbiotic algae that lives within the coral and gives it color.
While since then many of the reefs have been recovering, according to a report by the Maldives-based Marine Research Center, another warming last year (2010) estimated that “10-15 percent of shallow reef coral is now completely white, while 50-70 percent has begun to pale.”
Oceana is an event partner for the American Wind Energy Association’s (AWEA) Offshore Wind Conference in Baltimore, MD next week, October 11-13.
I’ll be at the conference representing Oceana, and I’ll be speaking on a panel about stakeholder engagement, which will focus on how best to engage and educate key stakeholders in the offshore wind development process.
Why is Oceana such a strong advocate for offshore wind, anyway? Here are a few big reasons:
- Because we have seen the damage that drilling for and burning fossil fuels can do to the health of the oceans and marine life, and we must find a better way to satisfy our energy needs.
- Because windmills harness a clean and infinite source of energy, while eliminating the risk of deadly oil spills and creating three times as many jobs as the oil industry.
- Because we believe that the environmentally safe and responsible development of offshore wind is one of the best chances we have as a country to end our addiction to fossil fuels and to finally stop the dangerous practice of oil and gas drilling in our oceans.
- Because we believe that, if sited correctly, offshore wind could be the ocean-based part of the solution to climate change and its "evil twin," ocean acidification.
- Because Oceana is in a unique position as both a stakeholder in the process and an advocate for offshore wind to the stakeholders/decision-makers in Congress, where we engage and educate congressional staff on the benefits of offshore wind. We collaborate with other environmental organizations and the offshore wind industry to advocate for legislative policies that help promote the development of offshore wind.
At last year’s conference, Secretary of the Interior Ken Salazar signed the first U.S. lease for offshore wind development, and since then, he and Secretary of Energy Steven Chu unveiled a National Offshore Wind Strategy. The plan includes the deployment of 10 gigawatts of offshore wind capacity by 2020 and 54 gigawatts by 2030, and Salazar and Chu announced $50.5 million in funding opportunities for projects that support offshore wind energy deployment.
In other words, it’s an exciting time in the world of offshore wind – and we’re thrilled to be a part of the action.
You can help, too! Tell your senators to replace dirty oil drills with clean windmills.
Nancy Sopko is an Ocean Advocate at Oceana.
This is part of a series of ocean infographics by artist Don Foley. These infographics also appear in Oceana board member Ted Danson’s book, “Oceana: Our Endangered Oceans and What We Can Do to Save Them.”
Coral reefs cover around 1 percent of the world’s continental shelves, yet they provide habitat and food to at least a quarter of all species in the oceans, including 4,000 species of fish. These diverse habitats also provide food, income and coastal protection for some 500 million people.
But coral reefs and the species that rely on them are increasingly threatened by an invisible menace: ocean acidification. Thanks to human-produced carbon dioxide emissions, the oceans are now 30 percent more acidic than they were prior to the industrial revolution and more acidic than at any point over the past 20 million years. Corals and other species are unlikely to be able to adapt to this rapid change in acidity and are likely to suffer severe decline.
Coral reefs are built by tiny, soft coral animals, or polyps. These polyps are relatives of jellyfish and have evolved to secrete calcium carbonate skeletons that provide the polyp with structure and protection.
Colonies of hundreds to thousands of polyps live together as corals and can build huge reef structures over many years. Not only are coral reefs some of the most diverse habitats on Earth, but they are also some of the oldest. Corals grow only millimeters to centimeters per year, and it can take tens to hundreds of thousands of years for large reefs to form.
You can help protect coral reefs by telling your Senators to reduce carbon emissions and stop ocean acidification.
Guest blogger Jon Bowermaster is a writer and filmmaker. In this post, Jon reports on the dangers of ocean acidification.
Of all the threats to the planet’s ocean, none may be more insidious or have longer-term impact than ocean acidification. It is also the least understood of all the potential harms.
Admittedly it is far easier to visualize plastic afloat on the surface of the Pacific or vast tracts of the Atlantic nearly devoid of fish than a chemical imbalance. But it is the change of acidity that may already be the ocean’s worst enemy.
Try this for a visualization, maybe it will help: 24 million tons of carbon dioxide created by the burning of fossil fuels – or the equivalent of 24 million Volkswagens – are dumped into the world’s ocean every single day.
On top of destroying coral reefs (the equivalent of wiping out rain forests on land) and killing off shellfish beds including mussels and oysters, a new report out of the U.K. suggests that the so-called “evil twin” of global warming is responsible for some fish losing their sense of smell and hearing.
It makes sense that ocean acidification is bad for marine life. But who knew it could have far-reaching effects on human health as well?
A new report by scientists at Woods Hole Oceanographic Institution (WHOI) shows that ocean acidification is threatening global food security by hindering the growth of clam, oyster, and other mollusk populations – staples in many nations’ diets.
Without healthy and reliable mollusk populations, countries may be forced to switch to aquaculture. Countries like Haiti, Senegal, and Madagascar, however, lack the ability to make this switch and are thus especially vulnerable to the impacts of mollusk shortages. And of course, problems like this never exist in a vacuum; even developed countries such as the U.S. will feel the effects via a potential drop in GDP.
Unfortunately, this isn’t just a theoretical problem – the deleterious effects can already be seen in both ecosystems and economic realms alike. In Australia’s Great Barrier Reef, scientists have observed that coral growth has slowed, and Pacific Northwest oyster farms have already experienced declining economic yields. Further effects, which will no doubt be broader in scope, will probably be seen in 10 to 50 years if we do not make a concerted effort to halt ocean acidification.
This is the eleventh in a series of posts about this year’s Ocean Hero finalists.
Today’s featured junior ocean hero finalist is 12-year-old Dylan Vecchione, who was nominated for his commitment to coral reef conservation.
This is the eighth in a series of posts about this year’s Ocean Hero finalists.
Today’s featured junior ocean hero finalist is Homer, Alaska native McKenzy Haber, who hosted the first ever TEDxHomer Teen conference in 2010, with a theme of sustainability.
McKenzy and several other teens adapted the TED model to get the word out about ocean conservation to 140 teens and adults in Homer, Alaska and 1,800 livestreaming online. The conference included talks about the oceans, climate change in the Arctic and Antarctica, and ecological economics.
At the 9th World Wilderness Congress, also known as WILD9, he gave a plenary speech called "Dear Developed Earth," to world leaders about teen leadership and protecting wild Alaskan waters. “Many delegates came up to me afterward crying and saying how moving it was,” McKenzy wrote via e-mail. Watch it and see why McKenzy is such an inspiration:
Guest blogger Jon Bowermaster is a writer and filmmaker. In this post, Jon reports on the state of corals in Bora Bora.
Bora Bora, Society Islands, French Polynesia – I dove last week in the beautiful lagoon that surrounds the tall island to have a first hand look at how the coral reef is doing in this South Pacific resort island. The report is not good.
Descending to 90 feet, it was immediately clear that the reef has been hammered in the past few years. I’ve come here every year for the past decade and have seen incredible change.
I spent most of the morning observing the still-growing reef system just 10 to 30 feet below the surface. Although the waters are warm and magnificently clear, invasive predators and natural disaster have both taken big tolls.
Populations of acanthaster -- also known as the crown-of-thorns starfish – mysteriously arrived in Polynesia in 2006. No one is sure exactly how they got here or where they originated, though invasive species are well known for hitching rides on cargo ships and jumping off far from home. Here in the shallows surrounding Bora Bora – as they have done to reefs on nearby Moorea, Raiatea-Tahaa, Huahine and Maupiti – the predatory starfish have devoured hundreds of acres of coral.
Many of you have inquired via Twitter, Facebook and e-mail about how the Japanese nuclear crisis is affecting the oceans and marine life. There are still a lot of question marks, but here’s what our scientists have to say.
How it could affect marine life in general:
The greatest concern for marine life comes from the radiation from cesium, strontium and radioactive iodine entering the oceans via the smoke and water runoff from the damaged facilities. Small doses of radiation will be spread out over the Pacific Ocean, and monitors on the U.S. West Coast have even picked up slight traces of radiation from the smoke.
Although the levels of cesium and radioactive iodine in the immediate vicinity of the plant have increased and very small amounts of radiation have even been detected in local anchovies (1 percent of acceptable levels), it is not clear whether there will be any long-term or significant impacts on marine life off the coast of Japan or out to sea, according to researchers who studied the marine effects of fallout from nuclear weapons tests in the Pacific and the Chernobyl nuclear accident.
- ICCAT Moves to Properly Manage Bluefin Tuna, but Doesn’t Take Action for Sharks and Swordfish Posted Wed, November 26, 2014
- Creature Feature: Ocean Sunfish Posted Thu, November 20, 2014
- Oceana in Chile Submits Recommendations for Lowering Common Hake Catch Quotas Posted Mon, November 24, 2014
- Ocean Roundup: Seals Can Pick up Pings from Acoustic Tags on Fish, Climate Change Making Crabs “Sluggish,” and More Posted Fri, November 21, 2014
- Video: Watch the Incredible Migration of Thousands of Giant Spider Crabs in Australia Posted Mon, November 24, 2014