Global warming may be greatest threat to tropical species
Washington - While global warming is expected to be strongest at the poles, it may be an even greater threat to species living in the tropics, scientists say.
Tropical species are accustomed to living in a small temperature range and thus may be unable to cope with changes of even a few degrees, according to an analysis in Tuesday’s edition of Proceedings of the National Academy of Sciences.
“There’s a strong relationship between your physiology and the climate you live in. In the tropics many species appear to be living at or near their thermal optimum, a temperature that lets them thrive. But once temperature gets above the thermal optimum, fitness levels most likely decline quickly and there may not be much they can do about it,” Joshua J. Tewksbury said in a statement.
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