Posts Tagged ‘acidification’
“We’re all scared…But we must tell the truth” — Experts Fear Collapse of Global Civilisation
By Stephen Leahy
UXBRIDGE, Canada, Jan 11 2013 (IPS)
Experts on the health of our planet are terrified of the future. They can clearly see the coming collapse of global civilisation from an array of interconnected environmental problems.
“We’re all scared,” said Paul Ehrlich, president of the Center for Conservation Biology at Stanford University.
“But we must tell the truth about what’s happening and challenge people to do something to prevent it,” Ehrlich told IPS.
Global collapse of human civilisation seems likely, write Ehrlich and his partner Anne Ehrlich in the prestigious science journal, Proceedings of the Royal Society.
This collapse will take the form of a “…gradual breakdown because famines, epidemics and resource shortages cause a disintegration of central control within nations, in concert with disruptions of trade and conflicts over increasingly scarce necessities”, they write.
Already two billion people are hungry today. Food production is humanity’s biggest industry and is already being affected by climate and other environmental problems. “No civilisation can avoid collapse if it fails to feed its population,” the authors say.
Escalating climate disruption, ocean acidification, oceanic dead zones, depletion of groundwater and extinctions of plants and animals are the main drivers of the coming collapse, they write in their peer-reviewed article “Can a collapse of global civilisation be avoided?” published this week.
Dozens of earth systems experts were consulted in writing the 10-page paper that contains over 160 references.
“We talked to many of the world’s leading experts to reflect what is really happening,” said Ehrlich, who is an eminent biologist and winner of many scientific awards.
Our reality is that current overconsumption of natural resources and the resulting damage to life-sustaining services nature provides means we need another half of a planet to keeping going. And that’s if all seven billion remain at their current living standards, the Ehrlichs write.
If everyone lived like a U.S. citizen, another four or five planets would be needed. Read the rest of this entry »
Ocean Acidification Leaves Mollusks Naked and Confused
Chilean intertidal carnivorous crab (Acanthocyclus hassleri)
Climate change is making oceans warmer and more acidic…expect the worst
By Stephen Leahy
When the carbon dioxide absorbed by the oceans dissolves in seawater, carbonic acid is formed and calcium carbonate, vital for the formation of the skeletons and shells of many marine organisms, becomes scarcer.
MONTEREY, California, Oct 2 2012 (IPS)
Climate change will ruin Chilean sea snails’ ability to sniff out and avoid their archenemy, a predatory crab, according to Chilean scientists who presented their findings at an international science symposium here.
Researchers from Australia also revealed that as the oceans become more and more acidic, some fish become hyperactive and confused, and move towards their predators instead of trying to escape.
“The conditions in oceans are changing 100 times faster than at any time in the past,” said Jean-Pierre Gattuso, a marine biologist with CNRS-INSU and the Laboratoire d’Océanographie de Villefranche in France.
Climate change is making oceans warmer and more acidic. “We are beginning to understand what will happen. I think we can expect the worst,” Gattuso told Tierramérica*.
Gattuso is one of nearly 600 scientists from around the world who presented their research on Sep. 24-27 at the Third International Symposium on the Ocean in a High-CO2 World: Ocean Acidification in Monterey, California.
Researchers discovered only 10 years ago that burning fossil fuels like coal, oil and gas has made the oceans about 30 percent more acidic since the beginning of the Industrial Revolution. Read the rest of this entry »
Ocean Acidification Leaves Mollusks Naked and Confused
By Stephen Leahy
When the carbon dioxide absorbed by the oceans dissolves in seawater, carbonic acid is formed and calcium carbonate, vital for the formation of the skeletons and shells of many marine organisms, becomes scarcer.
MONTEREY, California, Oct 2 2012 (IPS) -
Climate change will ruin Chilean sea snails’ ability to sniff out and avoid their archenemy, a predatory crab, according to Chilean scientists who presented their findings at an international science symposium here.
Researchers from Australia also revealed that as the oceans become more and more acidic, some fish become hyperactive and confused, and move towards their predators instead of trying to escape.
“The conditions in oceans are changing 100 times faster than at any time in the past,” said Jean-Pierre Gattuso, a marine biologist with CNRS-INSU and the Laboratoire d’Océanographie de Villefranche in France.
Climate change is making oceans warmer and more acidic. “We are beginning to understand what will happen. I think we can expect the worst,” Gattuso told Tierramérica*.
via IPS – Ocean Acidification Leaves Mollusks Naked and Confused | Inter Press Service.
Revealed: In Acidic Oceans Sunlight Kills Planet’s Most Important Organism — Marine Algae
A number of marine diatom cells (Pleurosigma), which are an important group of phytoplankton in the oceans.
Credit: Michael Stringer
“There’s a synergistic effect between increased ocean acidity and natural light”
“It’s clear we are conducting a giant experiment on the planet and we don’t know what we are doing.”
By Stephen Leahy
UXBRIDGE, Canada, May 8, 2012 (IPS)
Without major reductions in the use of fossil fuels, sunlight will kill an unknown number of ocean phytoplankton, the planet’s most important organism, a new study reports this week.
Not only are phytoplankton, also known as marine algae, a vital component in the ocean’s food chain, they generate at least half of the oxygen we breathe.
In the not so distant future, sunlight, the very source of life for phytoplankton, will likely begin to kill them because of the ocean’s increasing acidity, researchers from China and Germany have learned.
“There’s a synergistic effect between increased ocean acidity and natural light,” says Ulf Riebesell of the Helmholtz Centre for Ocean Research in Kiel, Germany.
Riebesell added that it was also possible “phytoplankton could adapt”.
Researchers were surprised to discover that diatoms, one of the most important and abundant types of phytoplankton, fared very badly during shipboard experiments conducted by co-author Kunshan Gao, from the State Key Laboratory of Marine Environmental Science at Xiamen University, Xiamen China.
Previous experiments in labs like Riebesell’s found that diatoms actually did better in high-acid seawater, unlike most other shell- forming plankton. Burning fossil fuels has made the oceans about 30 percent more acidic researchers discovered less than 10 years ago. Oceans absorb one third of the carbon dioxide (CO2) emitted from using fossil fuels.
The good news is this has slowed the rate of global warming. The bad news is oceans are now more acidic and it will get worse as more CO2 is emitted. This is basic, well-understood ocean chemistry. Read the rest of this entry »
Reducing Fossil Fuel Use Only Way to Save Dying Corals
Another important reason why continuing to burn more fossil fuels is very dangerous for all of us. Excerpts from July 2008 article — Stephen
‘The world’s fossil fuel economy is like the Titanic — we know its going to hit an iceberg but it takes a very long time to stop a really big ship..’
By Stephen Leahy
FORT LAUDERDALE, U.S., July 12, 2008 (IPS)
The rapid decline of coral reefs around the world offers a potent warning that entire ecosystems can collapse due to human activities, although there is hope for reefs if immediate action is taken, coral experts agreed at the conclusion of a five-day international meeting Friday.
“Reefs are in serious trouble, but don’t write them off,” Terry Hughes, a marine ecologist at Australia’s James Cook University told 3,000 scientists, conservationists and policy makers attending at the 11th International Coral Reef Symposium (ICRS) in Fort Lauderdale, Florida.
“We can save reefs if we take immediate action,” Hughes said.
More than 20 percent of the world’s reefs have died, and large areas are failing due to a combination of climate change, overfishing, pollution and sea level rise. Most of the fabulous corals that attract tourists to the Caribbean are gone and half of remaining reefs in the U.S. are in serious decline.
[Update 2010 - Here's a list of Stephen Leahy's latest articles on corals Coral Reefs and Acid Oceans Series]
“We may be facing ocean deserts in the future,” said Guillermo Dias-Pulido of Australia’s University of Queensland.
Reefs and Forests Burn as Climate Disruption Takes Hold NOW
A lot of coral reefs have died this year due to unprecedented ocean heating largely due to climate change. I broke that story last summer. Few coral reefs will survive the next 50 years most experts say without immediate action to reduce greenhouse gas emissions.
Forests are next in line according a new study in PNAS. Huge uncontrollable wildfires will dominate forest landscapes of the near future without dramatic reductions in the burning of fossil fuels the study found.
I would have done a full article explaining all this but simply can’t find a publication willing to pay me to do the work. That’s why I am trying community supported journalism where readers donate small amounts so these articles get done and made available for millions to read.
– Stephen (November 10 2010)
Ocean Losing Its Green – Planet’s Life Support System In Decline [New Article]
A number of marine diatom cells
A number of marine diatom cells
By Stephen Leahy
VIENNA, Jul 31, 2010 IPS
The oceans are the lifeblood of our planet and plankton its red blood cells. Those vital “red blood cells” have declined more than 40 percent since 1950 and the rate of decline is increasing due to climate change, scientists reported this week.
“Phytoplankton are a critical part of our planetary life support system. They produce half of the oxygen we breathe, draw down surface CO2, and ultimately support all of our fisheries,” said
Boris Worm of Canadas Dalhousie University and one of the worlds leading experts on the global oceans.
“An ocean with less phytoplankton will function differently,” said Worm, the co-author of a new study on plankton published this week in Nature. Plankton are the equivalent of grass, trees and other plants that make land green, says study co-author Marlon Lewis, an oceanographer at Dalhousie.
“It is frightening to realise we have lost nearly half of the oceans green plants,” Lewis told IPS.
“It looks like the rate of decline is increasing,” he said.
[See also my series of articles on ocean acidification]
Coral Reefs and Acid Oceans Series
Series of latest science articles documenting how global warming is transforming the Oceans and threatening Coral Reefs
Deep CO2 Cuts May Be Last Hope for Acid Oceans
(Report from the World Oceans Conference in Indonesia, May 2009)
Ocean acidification offers the clearest evidence of dangers of climate change.
And yet the indisputable fact that burning fossil fuels is slowly turning the oceans into an acid bath has been largely ignored by industrialised countries and their climate treaty negotiators, concluded delegates from 76 countries at the World Oceans Conference in Manado, Indonesia.
Oceans Passing Critical CO2 Threshold
An apparent rapid upswing in ocean acidity in recent years is wiping out coastal species like mussels, a new study has found.
“We’re seeing dramatic changes,” said Timothy Wootton of the Department of Ecology and Evolution at the University of Chicago, lead author of the study published Monday in the Proceedings of the National Academy of Sciences. The study shows increases in ocean acidity that are more than 10 times faster than any prediction.
Say Goodbye to Coral Reefs
GIJON, Spain, May 22 (IPS) – The one-two punch of climate change that is warming ocean temperatures and increasing acidification is making the oceans uninhabitable for corals and other marine species, researchers said at a scientific symposium in Spain.
Lose Corals and We Will be Fighting for Our Own Survival
“There would be no white sands on the beaches of Cancún without the Mesoamerican reef,” Professor Roberto Iglesias-Prieto, a marine ecophysiologist working at the Institute of Marine Sciences and Limnology of the National Autonomous University of Mexico, told Tierramérica.
Cutting CO2 Could Save Dying Corals
FORT LAUDERDALE, U.S., Jul 12 (IPS) – The rapid decline of coral reefs around the world offers a potent warning that entire ecosystems can collapse due to human activities, although there is hope for reefs if immediate action is taken, coral experts agreed at the conclusion of a five-day international meeting Friday.
A Third of Corals Face Extinction
FORT LAUDERDALE, U.S., Jul 10 (IPS) – One third of reef-building corals already face extinction because of climate change, the first-ever global assessment has found.
Life Support Needed For Coral Reefs
FORT LAUDERDALE, U.S., Jul 8 (IPS) – Coral reefs need to be put on “life support” if they are to survive climate change, but their ultimate survival is dependant on major reductions in fossil fuel emissions, say experts.
“We’re Running the Risk of Unstoppable Climate Change” — Oceanographer
“I’m afraid it is going to take a major catastrophe in the developed world…” Chris Reid.
Oceans are the Heart and Blood of the Earth — But are They Healthy?
If continents are the Earth’s sturdy bones and the atmosphere its thin skin, then the oceans are its heart, circulatory system and blood. And despite the crucial role played by the oceans in the health of the planet, and to our own health and well-being, there is little monitoring of ocean health.
Acid Oceans to ‘Dissolve’ Coral Reefs in 30 years
Coral reefs face certain extinction in a few decades unless there are unprecedented reductions in carbon emissions, leading Australian scientists warn.
Oceans Passing Critical CO2 Threshold
By Stephen Leahy
UXBRIDGE, Canada, Nov 24 (IPS)
An apparent rapid upswing in ocean acidity in recent years is wiping out coastal species like mussels, a new study has found.
“We’re seeing dramatic changes,” said Timothy Wootton of the Department of Ecology and Evolution at the University of Chicago, lead author of the study published Monday in the Proceedings of the National Academy of Sciences. The study shows increases in ocean acidity that are more than 10 times faster than any prediction.
“It appears that we’ve crossed a threshold where the ocean can no longer buffer the effects of CO2 in the atmosphere,” Wootton told IPS.
For millions of years, the levels of carbon dioxide in the atmosphere and the ocean were in balance, but the burning of fossil fuels and deforestation has put more CO2 into the atmosphere over the last 150 years. The oceans have absorbed one-third — about 130 billion tonnes — of those human emissions and have become 30 percent more acidic as the extra CO2 combines with carbonate ions in seawater, forming carbonic acid.
Each day, the oceans absorb 30 million tonnes of CO2, gradually and inevitably increasing their acidity. There is no controversy about this basic chemistry; however, there is disagreement about the rate at which the oceans are becoming acidic and the potential impact. Read the rest of this entry »
Say Goodbye to Coral Reefs
Coral reefs will be the first global ecosystem to collapse in our lifetimes.
By Stephen Leahy
GIJON, Spain, May 22 (IPS) – The one-two punch of climate change that is warming ocean temperatures and increasing acidification is making the oceans uninhabitable for corals and other marine species, researchers said at a scientific symposium in Spain.
And now other regions are being affected. Acidic or corrosive waters have been detected for the first time on the continental shelf of the west coast of North America, posing a serious threat to fisheries, Richard Feely, an oceanographer with the U.S. National Oceanic and Atmospheric Administration (NOAA), told attendees in Gijon, Spain Wednesday.
More than 450 scientists from over 60 countries are participating in the “Effects of Climate Change on the World’s Oceans” symposium.
“Surface waters off the coast of San Francisco had concentrations of carbon dioxide that we didn’t expect to see for at least another 100 years,” Feely told IPS. Read the rest of this entry »
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