Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
by Staff Writers
Zurich, Switzerland (SPX) Jul 03, 2014
How well tropical trees weather periods of drought depends on the carbohydrates stored, as revealed by a novel experiment conducted by an international team of researchers headed by ecologists from the University of Zurich in contribution to the University Research Priority Program on "Global Change and Biodiversity". The findings are extremely important for assessing the resistance of tropical forests to climate change and reforestation.
Water is the limiting factor for many plants and trees. Consequently, there are grave concerns that the rainfall patterns altered by climate change could trigger a forest decline on a global scale. According to climate researchers, Switzerland is also affected: The climate models even project hotter and drier summers for this country.
An international research team headed by Michael O'Brien, an ecologist at the University of Zurich, is now studying which factors govern the resistance of tropical trees to periods of drought. As the scientists reveal in their study published in Nature Climate Change, stored carbohydrates play a key role in the resilience of the individual plant.
1,400 saplings of ten species monitored
O'Brien and his team planted 1,400 saplings of ten different tropical tree species in Malaysia and devised a novel experiment to manipulate the carbohydrates stored and observe their reaction.
The researchers increased or decreased the concentration of stored carbohydrates and exposed the seedlings to an artificial drought period. It became clear that young trees with more stored carbohydrates were able to maintain the vital water content in the stem for longer than those with fewer stored carbohydrates.
"The better drought resistance and thus the greater chance of surviving a period of drought evidently depends on the quantity of carbohydrates stored," concludes O'Brien.
Carbohydrate content different in every tree species
Michael J. O'Brien, Sebastian Leuzinger, Christopher D. Philipson, John Tay and Andy Hector, Drought survival of tropical tree seedlings enhanced by non-structural carbohydrate level. Nature Climate Change, June 29, 2014. DOI:10.1038/nclimate2281
University of Zurich
Climate Science News - Modeling, Mitigation Adaptation
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.|