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Climate change linked to potential population decline in bees

Study finds that warmer temperatures push bees to their physiological limits, may drive local extinction, Science daily 

Date:
June 28, 2018
Source:
Northwestern University
Summary:
A new study has found that climate change may drive local extinction of mason bees in Arizona and other naturally warm climates.

A new study from Northwestern University and the Chicago Botanic Garden has found that climate change may drive local extinction of mason bees in Arizona and other naturally warm climates.

In a two-year, in situ field experiment that altered the temperature of the bees’ nests to simulate a warmer, future climate, 35 percent of bees died in the first year and 70 percent died in the second year. This is compared to a 1-2 percent mortality rate in the control group.

“The projected temperatures appear to be pushing this species up against its physiological limits,” said Northwestern’s Paul CaraDonna, who led the research. “This is evidence that we might see local extinction in the warmer parts of this species’ range, which is pretty sobering.”

The study will publish online on Thursday, June 28 in the British Ecological Society’s journal Functional Ecology. CaraDonna is an assistant professor of instruction in the Program in Plant Biology and Conservation in Northwestern’s Weinberg College of Arts and Sciences and a research scientist at the Chicago Botanic Gardens…….https://www.sciencedaily.com/releases/2018/06/180628105009.htm

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June 29, 2018 - Posted by | 2 WORLD, climate change

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