Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

UCBS's NCEAS find tropical forest blossoms are sensitive to changing climate

09.07.2013
The North Pole isn't the only place on Earth affected by slight increases in temperature.

Until recently, scientific thinking used to posit that tropical forests, which already exist in warm climates, may not be impacted much by climate change. But a new study conducted by UC Santa Barbara's National Center for Ecological Analysis and Synthesis (NCEAS) shows that to be erroneous.


The forest canopy from Barro Colorado Island, Panama shows Tabebuia guayacan in bloom.
Credit: S. Joseph Wright

In fact, the results indicate that tropical forests are producing more flowers in response to only slight increases in temperature. The findings were published online yesterday 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 Stephanie Pau, who conducted the research as part of a Forecasting Phenology working group while she was a postdoctoral associate at NCEAS. "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."

The study, which used a new globally gridded satellite dataset, examined how changes in temperature, clouds, and rainfall affect the number of flowers tropical forests produce. Analysis of the data indicated that clouds mainly have an effect on short-term seasonal growth, but longer-term changes in 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.

"This study is an inspired example of integrating diverse existing data to do something never imagined when the data were originally collected," explained Stephanie Hampton, deputy director of NCEAS. "Flowers were probably not what NASA scientists were thinking of when they archived these cloud data. Having access to environmental 'big data' and the skills to do data-intensive research drives innovation for creative teams like this."

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 a rainforest in Luquillo, Puerto Rico. According to Pau, the seasonally dry site has been producing more flowers at an average rate of 3 percent each year over the last several decades, an increase that appears to be tied to warming temperatures. Pau collaborated with NCEAS scientific programmer/analyst James Regnetz to scrutinize the data.

Flower productivity is a measure of the reproductive health and overall growth of the forests. The amount of sunlight reaching tropical forests due to varying amounts of cloud cover is an important factor, just not the most important when it comes to flower production. According to Pau, both sites still appear to respond positively to increases in light availability, yet temperature was the most consistent factor across multiple time scales.

"With most projections of future climate change, people have emphasized the impact on high-latitude ecosystems because that is where temperatures will increase the most," Pau said. "The tropics, which are already warm, probably won't experience as much of a temperature increase as high-latitude regions. Even so, we're showing that these tropical forests are still really sensitive to small degrees of change."

"The increasing availability of large data sets from long-term field studies and satellite data provide new opportunities to study how forests are responding to a warmer world," said Frank Davis, director of NCEAS. "Their discovery shows just how sensitive these systems can be to even small temperature changes."

Pau's co-authors include Benjamin I. Cook of the NASA Goddard Institute for Space Studies and the Lamont-Doherty Earth Observatory, Christopher J. Nytch and Jess K. Zimmerman of the University of Puerto Rico's Institute for Tropical Ecosystem Studies, Elizabeth M. Wolkovich of the University of British Columbia's Biodiversity Research Centre, and S. Joseph Wright of the Smithsonian Tropical Research Institute.

Julie Cohen | EurekAlert!
Further information:
http://www.ia.ucsb.edu

More articles from Ecology, The Environment and Conservation:

nachricht Bioinvasion on the rise
15.02.2017 | Universität Konstanz

nachricht Litter Levels in the Depths of the Arctic are On the Rise
10.02.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Microhotplates for a smart gas sensor

22.02.2017 | Power and Electrical Engineering

Scientists unlock ability to generate new sensory hair cells

22.02.2017 | Life Sciences

Prediction: More gas-giants will be found orbiting Sun-like stars

22.02.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>