Save Eco Destinations

Climate change will bring a combination of rising temperatures and increased predation that will result in biodiversity loss – and it may be worse than currently predicted, claims a study by University of British Columbia (UBC) zoologist Christopher Harley.

“Global warming is already having significant ecological impacts and it’s only going to get more dramatic,” Harley warned.

The study

Published in the current issue of the journal Science, the study examines how rocky shore barnacles and mussels react to the combined effects of warming and predation by sea stars.

Harley looked at the upper and lower temperature limits of barnacles and mussels from the cool west coast of Vancouver Island to the warm shores of the San Juan Islands, where water temperature rose from relatively cool in the 1950s to the much warmer years of 2009 and 2010.

He found that in cooler locations, mussels and rocky shore barnacles could live high on the shore and be shielded from their predators. But as temperatures rose, barnacles and mussels had to move to lower shore levels — and be exposed to predatory sea stars, whose location has not shifted.

“Sea stars are the terrors of the intertidal zone,” said Harley, Vancouver Sun reports. “As it gets hotter you would expect [species] to just move down to lower positions on the shore where they wouldn’t be out of the water for so long. But things aren’t shifting in unison.”

As daily high temperatures during the summer have jumped by almost 3.5 degrees Celsius in the last 60 years, barnacle and mussels have moved 50 cm lower on the shore. However, the effects of predators, and therefore the position of the lower limit, have thus far remained unchanged.

“That loss represents 51% of the mussel bed. Some mussels have even gone extinct locally at three of the sites I surveyed,” said Harley.

He then found that when stress from sea star predation was reduced by using exclusion cages, mussels and other species were able to live in hotter sites where they usually can’t — and their populations there more than doubled.

“A mussel bed is kind of like an apartment complex – it provides critical habitat for a lot of little plants and animals,” said Harley. “The mussels make the habitat cooler and wetter, providing an environment for crabs and other small crustaceans, snails, worms and seaweed.”

In contrast with many previous studies on how species ranges will change due to global warming, this analysis does not assume that species will simply relocate to remain in their current temperature range.

As animals or plants are unable to change their habitat ranges, Harley told, the findings show that warming and predation together could spawn more widespread extinction than scientists currently anticipate.

“Warming is not just having direct effects on individual species,” Harley added. “This study shows that climate change can also alter interactions between species, and produce unexpected changes in where species can live, their community structure, and their diversity.”

The effect on fishers

Relatedly, UBC researchers have also determined how climate change can impact the economic viability of current fisheries practices. Fish stocks are already yielding fewer fish due to overfishing and environmental factors such as pollution.

“Climate change is likely to cause more losses unless we choose to act,” said Rashid Sumaila, principal investigator of the Fisheries Economics Research Unit at UBC and lead author of the study.

A collaboration between economists, biologists and climate-change scientists, the study gives a broad outlook of the effect of climate change on fisheries and their profitability; it was published online in the journal Nature Climate Change. It received the support of the Pew Charitable Trusts, National Geographic, the World Bank and the U.S. National Oceanic and Atmospheric Administration (NOAA).

As waters warm, species move to cooler waters

Warming ocean temperatures have led many species to move farther towards the poles and into deeper and cooler waters. This means that while fishers in a few regions, such as Scandinavia in the far north, may benefit because they will now have more fish to catch, many others, and particularly fishers in the tropics, will lose an important food source along with their livelihoods. (Many fishers in tropical regions are poor and fish to feed themselves and their families.)

Researchers examined regional phenomena to help them find out what could happen on a global scale. For instance, lower catches of pelagic fish (such as sardines and anchovies) in Peru resulting from warmer waters during the 1997-1998 El Niño event caused more than USD 26 million in losses.

“For example, if you think about sardines on the Pacific Coast here: Whenever the temperatures are a bit higher, we see more sardines moving from Mexico through the US to Canada,” Sumaila noted, CBC News reports.

Fish survival is compromised

William Cheung, a biologist at the UBC Fisheries Center, said changes in temperature and ocean chemistry directly and adversely affect the physiology, growth, reproduction and distribution of marine life.

“Fish in warmer waters will probably have a smaller body size, be smaller at first maturity, with higher mortality rates and be caught in different areas,” he explained.

NOAA scientist and co-author Sam Herrick is calling for ongoing studies on how climate change and related factors will shape marine ecosystems and the productivity of fish populations.

Richer fish stocks = better adaptation to change

It was found that the bigger populations are, the better fish can adjust to environmental shifts such as warming temperatures. Minimizing the combined strains from overfishing, habitat degradation, pollution runoff, land-use transformation, competing aquatic resource uses and other anthropogenic factors will also contribute to helping stocks cope with climate change.

“We have to remember that the effect of climate change on the marine environment will occur alongside the impacts on land,” said Daniel Pauly, a UBC fisheries biologist and co-author.  “It will not be easy to divert resources from one sector to help another sector. This is why a strong governance system is needed – to temper the losses on the sectors that are worst hit.”

In other words, government officials need to step up and work harder to stop overfishing and illegal fishing, reduce runoff from agriculture and other polluting sources, and fight habitat destruction, among taking other measures.

Take a small step to make a difference

In the meantime, if you eat fish, something you can do is commit to purchasing only sustainably caught seafood. Read more about how to do this here:

• Greenpeace reveals canned tuna guide
• Fish eaters beware – your “sustainable” fish may not be

Related blog posts on Save Eco Destinations:

• Marine experts spell doom for world’s oceans, Pt. 2
• Marine experts spell doom for world’s oceans, Pt. 1

 

 

(This is part two of a two-part series on a report regarding the dismal state of our oceans. Part 1 of the series discusses the report’s findings and the primary ocean stressors currently involved.)

Entire marine ecosystems could disappear within a generation — a phenomenon that would take a devastating toll on humans, not just marine animals, according to the International Programme on the State of the Ocean (IPSO) report discussed in part one of this series.

You might be surprised to hear that shellfish and other marine animals comprise 15 per cent of animal protein for 3 billion people throughout the world, and another 1 billion people rely on fish stocks for their main source of protein. It’s important to remember that we need to preserve marine ecosystems, not only because they’re pretty to look at and something to explore when we’re taking a decadent beach vacation, but also because much of humanity’s food security is at stake here.

In fact, the United Nations Environment Program (UNEP) last December released a report called “Environmental Consequences of Ocean Acidification: A Threat to Food Security,” noting that burgeoning greenhouse gas emissions may have more widespread and complex effects on ocean health than previously anticipated, and that the chemistry of the globe’s oceans is being altered at a rate unseen for 65 million years.

The report confirms worries that corals, shellfish and other organisms may have an increasingly difficult time surviving due to weakening skeletons, and demonstrates that ocean acidification combined with ocean warming would lower the range of temperatures in which crabs and other animals can thrive.

This could powerfully affect, among other factors, catches of shellfish; species reliant on coral reefs and those such as salmon that feed on shell-building organisms lower down the food chain. – FIS

What’s more, climate change is predicted to cause big dents in coastal fisheries resources in the Pacific Islands region, potentially slashing production by as much as 50 per cent by 2100, the Secretariat of the Pacific Community’s Heads of Fisheries communicated in March. It is forecasted that higher sea temperatures, ocean acidification, and loss of important habitats like coral reefs, seagrass beds and mangroves will dramatically affect the inshore resources that provide myriad coastal communities in New Caledonia, Papua New Guinea, and other impoverished countries with food and a livelihood. And let’s not forget that people who live off fisheries in various ways populate most countries on Earth, from the United States and Malta to Argentina and Pakistan.

Some 55 million years ago, 2.2 gigatonnes of CO2 were released annually for thousands of years and numerous species died out. Today, it is estimated that 2.2. gigatonnes of CO2 are shot into the atmosphere every year by deforestation alone.

“The rate of carbon dioxide emissions in the atmosphere and the rate of change in the oceans is extraordinary — there is a very urgent need to get that under control,” stressed Alex Rogers, a professor of conservation biology at the University of Oxford and lead author of the study.

And now, the most important part of this series:

What YOU can do

To address the findings, the IPSO report gives several recommendations, such as the creation of “a global body empowered to ensure compliance with the United Nations Convention on the Law of the Sea” and steps to improve the fish stock sustainability.

Rogers suggested that anything from choosing the right kind of fish to eat to lobbying politicians helps.

I suggest that fish eaters scan Greenpeace’s canned tuna guide to make sure they are choosing sustainably caught tuna whose harvesting is not wiping out turtles, dolphins, or other species. Also, California’s Monterey Bay Aquarium has a seafood guide that’s really nifty (available as pocket or mobile, too) and the website is rich with information on related issues. Check out their recommendations!

Support green organizations like Sea Shepherd Conservation Society and Greenpeace, who work to both spread awareness about vital issues and fight the “bad guys” (in this case, Sea Shepherd – very courageously – goes after poachers hands-on, while Greenpeace targets harvesters of destructively caught fish and the companies that sell them, fights companies that pollute egregiously, and so on).

Attend clean-up days at your local beach or park. Go to Hands Across the Sand each year. Consider volunteering and donating whatever resources you have to anyone working toward a worthy cause.

Whenever a petition appears that could help ocean health, sign it. Visit sites like Care2 and Change.org and sign up for their newsletters to stay informed on new developments, learn how to help, and to find likeminded friends.

Together, we will make a difference.

“If I look at the mass, I will never act. If I look at the one, I will.” – Mother Theresa

(This is part one of a two-part series on a report regarding the dismal state of our oceans. Part two of the series tackles the situation’s repercussions on humans and what we can do to help our oceans recover.)

A team of marine experts announced this week a new summary report arguing that climate change and other man-made factors will spur colossal levels of extinction in the world’s oceans. The catastrophe is forecasted to be “unprecedented in human history.”

The proverbial excrement, it seems, is about to hit the fan.

Not surprisingly, it appears that changes in our atmosphere, ecosystems, and habitats across the planet are accelerating too quickly for many species to adapt and be able to survive.

“The speed of change, particularly related to climate change, is so great there simply isn’t time for marine life to adapt to these new conditions,” said Alex Rogers, a professor of conservation biology at the University of Oxford.

He explained that mass extinctions have been tied to considerable changes in the oceans’ carbon systems in the past.

“That’s what we’re bringing about through our own actions today,” he noted, reports ABC News.

Rogers and a team of 26 other researchers from various countries met earlier this year for a three-day workshop in England to study ocean stressors. Their full report is set to be published in the near future.

Ocean stressors at play

Ocean acidification is one key factor. Here’s what it’s about: carbon dioxide (CO2) (along with methane and other gasses) plays a huge role in heating up our planet and thereby causing climate change, which includes melting polar ice caps and rising ocean levels. Okay. What you might not know is that one-third of the planet’s CO2 is absorbed by the ocean, and that the more CO2 the ocean absorbs, the greater the waters’ acidity. This phenomenon is called ocean acidification and it’s noxious to our planet for many reasons. For example, rising acidity levels in our oceans have been found to:

• Impair fish hearing and smell, putting their survival in danger
• Kill off endangered species such as northern abalone
• Threaten the survival of krill, itself the basic food source of nearly all animals in the ocean

Apart from ocean acidification, rising water temperatures, overfishing, pollution, and even tourism are all exacerbating the rapid decline of species such as reef-forming coral. (Go here, here, and here for more on the state of coral reefs.)

Sharks and other species may be next, warned Rogers, lead author of the International Programme on the State of the Ocean (IPSO) report.

Further, he said that, in many cases, the impacts of ocean stressors were found to have a greater overall effect than any single effect when taken together. For example, the decline of coral reef ecosystems due to overfishing and reef bleaching, plus the acidification that causes bleaching, will eradicate “the most diverse marine ecosystems on the planet.”

Chilling.

“As we considered the cumulative effect of what humankind does to the ocean, the implications became far worse than we had individually realized,” Rogers said. “This is a very serious situation demanding unequivocal action at every level.”

Stay tuned for part two of this 2-part series.

In this last of four posts, I will discuss some unknown causes of coral reef mortality. In the first post, I looked at the dismal situation of coral reefs and their lack of official protection from trade, plus the incredible importance of these species for the survival of marine life and, in turn, human life. In the second post, I explored how climate change is jeopardizing the existence of coral reefs across the world’s oceans. And in the third post, I wrote about the overexploitation of pink and red corals in particular.

Unknown causes of seaweed overgrowth

Australia’s 345,000-square-km Great Barrier Reef has been found partly choked by seaweed, according to surveys conducted in 2009. Over 40% of the coral reef areas closest to shore were found clogged with the weed.

“We are concerned about it because it does look like a lot of weed and in other places in the world, weed is an indication of decline,” said marine biologist Professor David Bellwood from James Cook University.

Bellwood suspects the overgrowth has been caused by the depletion of algae-eating fish around the coral reef. Without the presence of fish to feed on algae, of course, the plant is allowed to flourish unfettered and smother coral polyps.

“The question is, does this mean the Barrier Reef is in real trouble? That the reef is rotting from the inside out? Or does it mean to say that that amount of weed is natural? And the answer is: it’s hard to say,” he said.

Yet, alarmingly, he assured that

“The Great Barrier Reef is in the best condition of any reef in the world.”

Yowza. Sounds like dire news to me. It’s like saying that guy who suffers from asthma still breathes better than everyone else. He’s still got asthma, so how well can he really be doing?

As well, algae growth is caused by elevated nutrient levels in the water due to fertilizer runoff (from golf courses, farms, and so on) and untreated sewage.

It has also been suggested that sedimentation—possibly caused by heavy rainfall—can spark algal overgrowth. Other ways sedimentation promotes coral death is by smothering or burial (reef-building corals depend on high light, high oxygen, low turbidity, low nutrients, and open ocean salinity to remain healthy); decreasing growth through coral abrasion and shading; increasing the production of respiration and mucus; and by reducing coral reproduction, coral larval settlement, and early survival.

Unknown causes of coral malformations

White warts and tumors that show up on coral reefs are irregular shaped skeletal abnormalities. Because these malformations display fewer protective mucous cells than regular corals, and a porous skeleton, they are especially vulnerable to predation and erosion from algae and other organisms. In turn, damaged coral abnormalities cause local coral mortality and can thwart colony fitness and fecundity.

The causes of coral malformations are speculated to “range from biological pathogens transmitted by corralivore fishes, genetic mutations and external environmental conditions such as excessive UV radiation exposure,” according to APEX Environmental.

Yellow-band disease on a stony coral

Unknown causes of coral diseases and syndromes

These conditions are usually prompted by stresses such bacteria, fungi, and viruses, as well as rising sea temperatures, UV radiation, sedimentation, and pollution. These stresses can exacerbate each other.

The causes of most coral diseases remain unknown, however, according to the National Oceanic and Atmospheric Administration (NOAA) of the U.S.

Coral diseases include black-band disease, coral bleaching, dark-spots disease, red-band disease, white-band disease, white-plague disease, white pox, and yellow-blotch disease.

Of course, the topic is nearly inexhaustible.

You can follow this link and the ones above to learn about additional causes of coral reef mortality.

Coral bleaching

This post is part two of a four-part series. Here I will look at how climate change is jeopardizing the existence of coral reefs across the world’s oceans. In the third part of the series, I will explore coral reefs’ overexploitation, and in the fourth, I will explore some unknown causes of coral reef mortality.)

(Here is the first post of the series, which covers the general dismal situation of coral reefs and their lack of official protection from trade, plus the incredible importance of these species for the survival of marine life and, in turn, human life.)

How climate change is threatening coral reefs

Ocean acidification

Carbon dioxide (CO2), as we know, plays a huge role in warming up our planet and causing climate change. What you might not know is that one-third of the planet’s carbon dioxide is absorbed by the ocean, and the more CO2 the ocean absorbs, the greater the waters’ acidity. The effects of ocean acidification, as this phenomenon is called, remain partly unpredictable.

Scientists do know, however, that worsening ocean acidification harms coral reefs, crustaceans, and shellfish because it weakens these species’ calcium carbonate shells. These animals thus become unable to build thick, protective shells for themselves and turn into easier prey for predators and pollution.

Coral reefs located near the poles will suffer these effects more sharply than those in warmer waters for two reasons: first, colder water absorbs more CO2 than warm water, and second, coral reefs in cold water grow at a slower pace than other coral reefs.

Bleached corals

Coral bleaching and disease

Warming waters also cause the bleaching of coral reefs. Naturally occurring, beneficial bacteria living on coral turns begins to disappear as temperatures rise, facilitating the onslaught of pathogenic bacteria that cause bleaching and other types of disease.

Moreover, the type of pathogenic bacteria that take over coral reefs sticks even if the temperature drops low enough to provoke the return of beneficial bacteria. By this time, the coral is too sick to recover and dies.

For those interested, here is an article on a recently created mathematical model that explains how coral reefs die due to warming waters.

Here is the U.S.’s National Oceanic and Atmospheric Administration (NOAA) explanation:

“Because many corals live in water which is already near their upper temperature limit, a water temperature increase of only a few degrees can be deadly. As water temperatures rise, corals become increasingly stressed. When stress levels get too high, corals expel the symbiotic algae, or zooxanthellae (tiny one-celled plants) which live within the thin layer of live coral tissue. Zooxanthellae are important because they turn sunlight into food for their coral hosts. They also facilitate the formation of the coral skeleton — the main structural component of coral reefs. Because zooxanthellae give corals their various rich colors, a coral without zooxanthellae appears bleached. Corals can not thrive without zooxanthellae. For coral reefs that are already stressed due to poor water quality, destructive fishing, or frequent interactions with irresponsible divers and snorkellers, increased water temperatures could become the proverbial straw that breaks the camel’s back.”

(For more information, here is a previous post I wrote on the effects of climate change on coral reefs.)

Earth Hour is coming up again! This Saturday, March 27 from 8:30-9:30pm (local time) people all over the world will turn off their lights to conserve energy and raise awareness about climate change. Make sure to sign up on the website to let others know you’ll be doing it.

Earth Hour is organized by the World Wildlife Fund (WWF), which does some cool things (like this event), but also does stupid and harmful things, like set up the Marine Stewardship Council (MSC), which deceivingly certifies many unsustainably managed fisheries as sustainable with its little blue eco label. (If you’re interested in the fraud that is the MSC, you can read articles about it here, here, and here – this last one explains why Greenpeace calls the MSC “unendorsable.”)

As I’ve said before, I find Earth Hour problematic, if well-intentioned. Either way, I support Earth Hour. I will turn off the electric lights and light candles instead. My roommate’s got plenty of them already – random power outages aren’t too rare in Buenos Aires, you see.

So I’m all set. What about you?

And I’d like to take a moment to share some little but encouraging news: Someone yesterday forwarded me a memorandum sent by the Brickell Key Master Association run by Swire encouraging all residents on Brickell Key Island in Miami, FL, to turn off their lights for one hour between 8:30-9:30pm on Saturday for Earth Hour. (Note: Brickell Key is a posh fake island full of residential buildings and the very expensive Mandarin hotel located downtown Miami.) I never knew they would care. After all, they often leave lights on during the day (yes, even outside, I’ve seen it) and have only trash bins around the island – zero recycling bins. Oh, and whenever I sit on the grass there my skin itches so badly afterward that I have to wash it with soap and water to get any relief. So, you know, I didn’t have high hopes for a place like Brickell Key, and this news brought a smile to my face. Even if Swire is just pretending to care, which it very well may be.

It’s better than nothing. Like those vegetarians who give up animal foods it just to lose weight or because it’s trendy. Bring it on, I say. The more vegetarians – and the more lights off – the better, whatever the reason.

Earth Hour 2009 - Before and after images, showing the lights on and off in the financial district, on the occassion of the WWF's Earth Hour 2009 event, Toronto, Ontario, Canada. Credit: © Billy Ivy / Ivy Images / WWF-Canada

Show the world you care.

Earth Hour Power!

What the hell, government leaders?

Did you catch that BBC article last week reporting that the UK government believes it is  highly unlikely that a climate treaty will be agreed on in Copenhagen next month? Oh, and a full treaty is about a year away.

You’re kidding, right?

Just two years ago, governments across the globe promised to get their respective asses in gear at the summit in Copenhagen to take place in December 2009. Did they lose their calendars? Poor governments. It’s not like they have anyone to get their shit organized.

Let me rephrase, actually: it is the governments of more developed countries that are failing everyone else, while developing countries rightfully complain that they’re getting screwed.

“When we left (UN talks in) Bali two years ago, we all expected that would be agreeing on a legally binding outcome to respond to the urgency… that we were on the verge of catastrophic climate change, so we’re very disappointed,” said Selwin Hart from Barbados, speaking for the group of small island developing states.

“If we don’t take urgent and ambitious action, the reality is that some small island developing states will not be around within a couple of decades – certainly not by the end of the century.”

But EU delegates say the treaty is so complex that getting through the legal red tape will not be possible this year. Conversely, South Africa’s Alf Wills, who co-ordinates the G77/China bloc of developing countries on extending the Kyoto Protocol, thinks it’s a political issue, as officials aren’t agreeing on what moves to make. He said developing countries have already put their proposals forward.

Artur Runge-Metzger, chief negotiator for the European Commission, said a period of 3-6 months might yield results. And US delegates said their legislation will not be ready in the next 6 months.

Environmental groups rightly opine that developed countries haven’t gotten as far as other nations because, well, they chose not to.

“So much can blamed on the Big Carbon special interests driving Washington. If Europe doesn’t stand up to America to save this deal, there could be grave implications for millions across the world,” said Joss Garman of Greenpeace.

Come on, Obama, don’t let the world down.

By the way, here’s a great chart that lays out where countries stand on climate change issues.

The coalition 350.org has created a day for climate action.

Earth citizens in 181 countries have organized over 5,200 climate action events around the globe to celebrate climate change awareness, concern, action, and leadership.

What it is

If you didn’t hear about this from other sources or through SED on Twitter this past week, watch this short animation explaining the concept behind 350:

The Point

The coalition 350.org created the International Day of Climate Action to unite people everywhere toward a common goal of reducing the carbon dioxide in our atmosphere to 350 parts per million – what scientists say is the safest upper limit for carbon dioxide for humanity.

We’re already at 387 ppm.

The point is to get our world leaders to haul ass so we can get back down to at least 350 ppm ASAP.

Do it

Go add your name to 350.org’s International Day of Climate Action – and, of course, get up and do something ;)

Then, add photos of what you did to the website by emailing them to photos@350.org and upload a video to their website.

You can also donate to the cause and volunteer.

Remember!

The Copenhagen, Denmark talks are coming up in December! Delegates, NGOs, and businesses from every nation will be there to discuss and finalize a new global climate change agreement. This two-week long conference will determine what the world’s next steps will be to fight climate change.

It is crucial that we make ourselves heard.

So be loud !

It’s fun.

If you love biking, have I got good news for you!

You can partake in a fully supported fundraising bike ride next month and spend 5 days traversing gorgeous landscapes to raise awareness about climate change, plus hang out with 200+ likeminded people—from renewable energy experts to climate activists and average Janes and Joes.

There are currently 40 spots left to register and for Brita Climate Ride, a 5-day, 300-mi-long bike ride taking you all the way from New York City to Washington, D.C. from September 26-30.

Once in D.C., you will hit the Capitol and get an opportunity to meet your state reps – and badger them into pulling their heads out of their, uh, bums, in time for the COP15 Copenhagen, the United Nations Climate Change Conference from December 7-18.

The event is a way to raise funds to support

essential climate and bicycling advocacy projects at three beneficiary organizations: Focus the Nation, Rails-to-Trails Conservancy, and Clean Air – Cool Planet. Your fundraising helps the beneficiaries continue to provide the critical services and education needed to address climate and energy issues.

Additionally, you will be raising general awareness about climate change, carbon neutrality, and renewable energy.

There will be networking and informative talks provided by climate experts on subjects such as green technology and “solutions” to climate change (I suppose they mean mitigating the potentially devastating effects of climate change – or do you believe we still have time to turn back time? I don’t.). You can also munch on “great food.” Hopefully they’re looking into sustainably-grown food.

Go here for more videos – even to check out some of the countryside you’d be riding through.

If you’re not into biking but would like to help out, you definitely sponsor the ride.