Woodrats Adapt to Creosote
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creosote toxinsPhys Org
•Woodrats use 'quantity over quality' as a detox plan, study finds
88% Informative
Study is first to pinpoint specific genes and enzymes that allow woodrats to eat the near lethal food without obvious harm.
Woodrats have only been exposed to creosote bush for about 15,000 years —in an evolutionary timescale, that's very little time.
The authors propose that gene duplication is an important mechanism by which animals initially adapt to new environmental pressures.
Fossilized woodrat nests reveal that their diets shifted in step with the expanding desert habitat.
Woodrats ate even more creosote as the bush outcompeted their previous staple, juniper.
It's unusual for populations of the same species, from similar geographic regions, to exhibit such a variance in gene copy number.
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