Yet another study I don’t believe without even reading it.
Posted by Jeff Id on October 7, 2010
Click the link at your own risk.
In hot places, even minor warming could rev up metabolism in animals that don’t generate their own heat
“It’s taken a while for people to start applying the thinking of climate change to the tropics,” says tropical ecologist Catherine Cardelús. At first biologists tended to dismiss tropical organisms as already highly adapted to heat, says Cardelús, of Colgate University in Hamilton, N.Y. But a growing number of studies are showing that ecology is far from that simple.
Dillon speculates that sped-up ectotherms in the tropics might become more vulnerable to starvation if resources can’t keep pace, he speculates. “If you’re burning more energy, you need more energy,” Dillon says. Food webs may shift. Soil respiration may increase. Mosquitoes may breed faster.
To see what those shifts do to metabolism, the researchers tweaked a basic physiological equation to create four versions, one each to represent a generalized single-celled organism, an invertebrate, an amphibian or a reptile. For each of the millions of temperature records, researchers calculated metabolic rates for each of the four groups.
Based on these calculations, warming could hit low-latitude ectotherms harder than high-latitude ones. Arctic temperature increases could double those in the tropics, and metabolic changes in each region’s ectotherms would still be about equivalent.