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Temperature increases causing tropical forests to blossom, according to study
Date:7/8/2013

TALLAHASSEE, Fla. -- A new study led by Florida State University researcher Stephanie Pau shows that tropical forests are producing more flowers in response to only slight increases in temperature.

The study examined how changes in temperature, clouds and rainfall affect the number of flowers that tropical forests produce. Results showed that clouds mainly have an effect over short-term seasonal growth, but longer-term changes of these forests appear to be due to temperature. While other studies have used long-term flower production data, this is the first study to combine these data with direct estimates of cloud cover based on satellite information.

The results of the study, "Clouds and Temperature Drive Dynamic Changes in Tropical Flower Production," was published July 7 in the journal Nature Climate Change.

"Tropical forests are commonly thought of as the lungs of the earth and how many flowers they produce is one vital sign of their health," said Pau, an assistant professor in Florida State's Department of Geography. "However, there is a point at which forests can get too warm and flower production will decrease. We're not seeing that yet at the sites we looked at, and whether that happens depends on how much the tropics will continue to warm."

U.S. Geological Survey Senior Scientist Julio Betancourt, who was not involved in the study, described Pau's research as "clever."

"It integrates ground and satellite observations over nearly three decades to tease apart the influence of temperature and cloudiness on local flower production," Betancourt said. "It confirms other recent findings that, in the tropics, even a modest warming can pack quite a punch."

Pau led a team of international researchers who studied seasonal and year-to-year flower production in two contrasting tropical forests -- a seasonally dry forest on Barro Colorado Island, Panama, and an "ever-wet" forest in Luquillo, Puerto Rico.
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Contact: Stephanie Pau
spau@fsu.edu
850-644-8377
Florida State University
Source:Eurekalert

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