by Staff Writers
Ithaca NY (SPX) Dec 15, 2011
No laggards, those bees and plants. As warm temperatures due to climate change encroach winter, bees and plants keep pace. An analysis of bee collection data over the past 130 years shows that spring arrives about 10 days earlier than in the 1880s, and bees and flowering plants have kept pace by arriving earlier in lock-step.
The study also found that most of this shift has occurred since 1970, when the change in mean annual temperature has increased most rapidly, according to Bryan Danforth, Cornell professor of entomology, who co-authored a study published the Proceedings of the National Academy of Sciences.
"It's an illustration of how valuable our natural history collections are at Cornell, even if you don't know in advance how these collections might be used," says Danforth. Lead author Ignasi Bartomeus and senior author Rachael Winfree are both entomologists at Rutgers University.
Although the triggers for bee spring emergence are unknown, bees may simply be cued to emerge when temperatures rise above a threshold over a number of days, but "if climate change accelerates the way it is expected to, we don't know if bees will continue to keep up," says Danforth.
Co-authors include researchers from the American Museum of Natural History, University of Connecticut, and York University in Canada. Jason Gibbs, a Cornell postdoctoral associate, conducted and supervised a team of undergraduates entering bee data at Cornell.
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Plant growth affected by tea seed powder
Copenhagen, Denmark (SPX) Dec 15, 2011
Natural products marketed as plant growth enhancers are becoming increasingly sought-after. Many of these products, typically produced by small companies with limited research capabilities, have not been tested in farm trials, nor have claims about product effectiveness been documented by scientific data. Researchers from the University of Copenhagen investigated the growth regulatory effe ... read more
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