World biodiversity has declined by almost one third in the past 35 years due mainly to habitat loss and the wildlife trade, the World Wide Fund for Nature (WWF) said on Friday

It warned that climate change would add increasingly to the wildlife woes over the next three decades.

“Biodiversity underpins the health of the planet and has a direct impact on all our lives so it is alarming that despite of an increased awareness of environmental issues we continue to see a downtrend trend,” said WWF campaign head Colin Butfield.

“However, there are small signs for hope and if government grasps what is left of this rapidly closing window of opportunity, we can begin to reverse this trend.”

WWF’s Living Planet Index tracks some 4,000 species of birds, fish, mammals, reptiles and amphibians globally. It shows that between 1970 and 2007 land-based species fell by 25 percent, marine by 28 percent and freshwater by 29 percent. (more…)

SYDNEY (Reuters) - Climate change might be causing reef fish to get lost, unable to return to breeding grounds from the open ocean, which could have profound implications for the survival of reef ecosystems, Australian scientists say.

Climate change-induced environmental stress, including warmer and more acidic seawater, could be hindering the development of the ear bones in young reef fish, which rely on sound for navigation, the marine experts said on Friday.

The scientists from the James Cook University and the Australian Institute of Marine Science found that fish with asymmetrical ear bones struggle to return to their home reef. (more…)

Depleted by over-harvesting and pollution, the world’s major fishing grounds are now severely threatened by climate change as well, according to a UN report released Friday.

Warmer water and acidification caused by the seas’ absorption of atmospheric carbon dioxide are disrupting fragile natural cycles and threaten a dramatic collapse of fish stocks, the report said.

‘What we do over the next decades has the potential to affect ocean chemistry for tens of thousands of years, and marine life for millions of years,’ said one of the authors, marine scientist Ken Caldeira of Stanford University.
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Climate change is a significant and emerging threat to public health, and changes the way we must look at protecting vulnerable populations.

The most recent report of the Intergovernmental Panel on Climate Change confirmed that there is overwhelming evidence that humans are affecting the global climate, and highlighted a wide range of implications for human health. Climate variability and change cause death and disease through natural disasters, such as heatwaves, floods and droughts. In addition, many important diseases are highly sensitive to changing temperatures and precipitation. These include common vector- borne diseases such as malaria and dengue; as well as other major killers such as malnutrition and diarrhoea. Climate change already contributes to the global burden of disease, and this contribution is expected to grow in the future. (more…)

What was once seen as the solution to all our CO2 problems, the ability of trees to soak up anthropogenic carbon dioxide, has itself been hindered by global warming.

A 20-year analysis of 30 sites in the frozen north has discovered that trees ability to take in CO2 is weakening. Whereas once it was assumed that just by planting more trees we could slow down the climate change tide. These results tell us unquestionably that we need to stop passing the buck, and stop creating CO2.
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As warming temperatures push organisms to seek cooler climates at ever-higher altitudes, habitat areas are shrinking, putting many species of plants and animals at risk. This trend could have particularly dire consequences for the world’s bird populations, according to a new report in the journal Conservation Biology. “It’s like an escalator to extinction,” says lead author Cagan Sekercioglu, a senior research scientist with the Department of Biological Sciences at Stanford University. “As a species is forced upwards and its elevational range narrows, the species moves closer to extinction.”

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