#CBC: « Oceanic warming threatens polar wildlife with extinction  » #Toronto #Montreal #Calgary #Ottawa #Canada


Polar bears and different iconic animals might be extinct by the tip of the century if ocean temperatures proceed to rise on the present price, marine biologists warned Monday.

Warming temperatures brought on by climate-changing emissions might end in a catastrophic lack of marine wildlife and drastic adjustments to ocean meals webs by 2100, scientists on the Florida Institute of Technology and the University of North Carolina stated in a paper printed within the journal Nature Climate Change.

Much present marine life will likely be unable to tolerate ocean temperatures which are projected to extend by 2.eight levels Celsius on common, based on the research.

« With warming of this magnitude, we expect to lose many, if not most, animal species from marine protected areas by the turn of the century, » stated the research’s lead creator, John Bruno, a biologist on the University of North Carolina-Chapel Hill.

Marine protected areas, established as sanctuaries for polar bears, coral reefs and different wildlife threatened by human actions corresponding to fishing and oil extraction, have failed to guard species from the impacts of world warming, the scientists stated.

In the Florida Keys National Marine Sanctuary, a lot of corals have already got been destroyed by bleaching and illnesses associated to increased temperatures, the research famous.

We must take daring steps individually and as a society to manage emissions.– Richard Aronson, research co-author

The protections in place will likely be ineffective by 2100 if greenhouse fuel emissions proceed to rise on the present price, researchers stated.

Reduced oxygen concentrations within the ocean – one consequence of world warming – will make marine protected areas uninhabitable to most species, they argued.

Richard Aronson, a co-author of the research and head of the division of ocean engineering and marine sciences at Florida Tech, stated wildlife within the Arctic and Antarctic is especially in danger.

« Oceanic warming is happening most rapidly at the poles. Warming will threaten polar ecosystems generally, including iconic wildlife like polar bears and penguins, » he stated in an electronic mail.

Around 90 p.c of the warmth trapped by greenhouse gases is absorbed by oceans, Aronson stated.

« We have to take bold steps individually and as a society to control emissions. Shifting away from our dependence on fossil fuels would be a major step in the right direction, » he stated.

« Stabilising emissions over the next few decades could cut the rate of warming in half, » he added.

Note: « Previously Published on: 2018-05-07 14:47:09, as ‘Oceanic warming threatens polar wildlife with extinction

‘ on CBC RADIO-CANADA. Here is a supply hyperlink for the Article’s Image(s) and Content ».

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