Posts Tagged ‘global warming’

Acid Oceans From Greenhouse Gases Threaten Extinctions

Thursday, October 10th, 2013

“The world’s oceans are now more acidic than they have been for at least 300 million years, which scientists who made the discovery warn poses a threat of mass extinction of marine species worldwide.

The change in the ocean’s chemistry is said to be due to carbon dioxide emissions from the burning of fossil fuels.

This, combined with overfishing and pollution, imperils marine life on which billions of people depend..”

Read more of this Earthweek article

‘Jacuzzi vents’ model CO2 future

Sunday, February 19th, 2012

“A UK scientist studying volcanic vents in the ocean says they hold a grave warning for future marine ecosystems.

These vents have naturally acidified waters that hint at how our seas might change if atmospheric carbon dioxide levels continue to rise.

They are conditions that would make it harder for corals and similar organisms to make the hard parts in their bodies.

Dr Jason Hall-Spencer’s work suggests our oceans could lose perhaps 30% of their biodiversity this century.

The Plymouth University researcher has been presenting his latest findings to a major conference in Vancouver, Canada.

“I am investigating underwater volcanoes where carbon dioxide bubbles up like a Jacuzzi, acidifying large areas of the seabed, and we can see at these vents which types of organisms are able to thrive and which ones..”

Read the rest of this BBC article

Coral reefs ‘will be gone by end of the century’

Monday, October 3rd, 2011

They will be the first entire ecosystem to be destroyed by human activity, says top UN scientist

Coral reefs are on course to become the first ecosystem that human activity will eliminate entirely from the Earth, a leading United Nations scientist claims. He says this event will occur before the end of the present century, which means that there are children already born who will live to see a world without coral.

The claim is made in a book, which says coral reef ecosystems are very likely to disappear this century in what would be “a new first for mankind – the ‘extinction’ of an entire ecosystem”. Its author, Professor Peter Sale, studied the Great Barrier Reef for 20 years at the University of Sydney. He currently leads a team at the United Nations University Institute for Water, Environment and Health.

The predicted decline is mainly down to climate change and ocean acidification, though local activities such as overfishing, pollution and coastal development have also harmed the reefs. The book, Our Dying Planet, published by University of California Press, contains further alarming predictions, such as the prospect that “we risk having no reefs that resemble those of today in as little as 30 or 40 more years”.

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Sharks Are in Trouble, New Analysis Confirms

Saturday, October 1st, 2011

ScienceDaily (Sep. 30, 2011) — Sharks are in big trouble on the Great Barrier Reef and worldwide, according to an Australian-based team who have developed a world-first way to measure rates of decline in shark populations.

“There is mounting evidence of widespread, substantial, and ongoing declines in the abundance of shark populations worldwide, coincident with marked rises in global shark catches in the last half-century,” say Mizue Hisano, Professor Sean Connolly and Dr William Robbins from the ARC Centre of Excellence for Coral Reef Studies and James Cook University.

“Overfishing of sharks is now recognized as a major global conservation concern, with increasing numbers of shark species added to the International Union for the Conservation of Nature’s list of threatened species,” they say in the latest issue of the international science journal PLos ONE.

“Evaluating population trends for sharks is complicated,” explains Professor Connolly. “The simplest approach of looking at trends in fisheries catches doesn’t work well for sharks. First, many countries with coral reefs don’t keep reliable records of catches or fishing effort.

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Marine life facing mass extinction, report says

Tuesday, June 21st, 2011

“London (CNN) — Marine life is under severe threat from global warming, pollution and habitat loss, with a high risk of “major extinctions” according to a panel of experts.

These are the conclusions of a distinguished group of marine scientists who met at Oxford University, England, in April to discuss the impact of human activity on the world’s oceans.

The meeting, led by the International Programme on the State of the Ocean (IPSO), examined the combined effects of pollution, acidification, ocean warming, over-fishing and depleting levels of oxygen in the water.

The panel found that oceanic conditions are similar to those of “previous major extinctions of species in Earth’s history,” and that we face losing marine species and entire marine ecosystems, such..”


 

Read the rest of this CNN report

World’s oceans in ‘shocking’ decline

Monday, June 20th, 2011

“The oceans are in a worse state than previously suspected, according to an expert panel of scientists.

In a new report, they warn that ocean life is “at high risk of entering a phase of extinction of marine species unprecedented in human history”.

They conclude that issues such as over-fishing, pollution and climate change are acting together in ways that have not previously been recognised.

The impacts, they say, are already affecting humanity.”


Read the rest of this BBC article

Acid oceans turn ‘Finding Nemo’ fish deaf

Monday, June 20th, 2011

“Clownfish, the spectacular tropical species featured in the movie Finding Nemo, appear to lose their hearing in water slightly more acidic than normal.


At levels of acidity that may be common by the end of the century, the fish did not respond to the sounds of predators.

The oceans are becoming more acidic because they absorb much of the CO2 that humanity puts into the atmosphere.”
Read the rest of this BBC article

Barbie: You’re dumped! Stop destroying rainforests for toy packaging!

Thursday, June 9th, 2011

Join the campaign to stop Mattel adding to the destruction of one of the world’sgreatest ecosystems and adding to climate change.

Coral reef destruction may be slowing.

Sunday, June 5th, 2011

There’s some good news, for a change, in the latest climate forecast from the National Oceanic and Atmospheric Administration.  NOAA scientists say the world’s threatened coral reefs, which for decades have been bleaching out and dying off because of climate-induced changes in ocean conditions, might be getting a respite this year.”

Read the rest of this article

Get Facebook to use a greener energy

Wednesday, December 22nd, 2010

Part of ‘cloud computing’, data centres and telecommunication networks, will likely consume about 1,963 BILLION kilowatt-hours of electricity by 2020. That’s more than the current electricity consumption of France, Germany, Canada and Brazil combined!

Find out more – visit www.greenpeace.org/coalfacebook