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Biodiversity enhances ecosystems global drylands -- Ben-Gurion U researchers
Date:1/31/2012

BEER-SHEVA, Israel -- An international team of researchers including Dr. Bertrand Boeken of the Jacob Blaustein Institutes for Desert Research at Ben-Gurion University of the Negev suggest in a new study that plant biodiversity preservation is crucial to buffer negative effects of climate change and desertification in drylands.

The study titled, "Plant species richness and ecosystem multi-functionality in global drylands", published in the prestigious journal Science is the outcome of a five-year research effort involving more than 50 researchers from 30 institutions in 15 different countries, including Dr. Boeken of the BGU Jacob Blaustein Institutes for Desert Research. Dr. Boeken and Dr. Eli Zaady of the Gilat Research Center, the Volcani Institute - Agriculture Research Organization contributed research data from two long-term ecological research sites in the northern Negev.

The results of this study indicate that the ability of ecosystems in drylands worldwide to maintain multiple functions, such as carbon storage and buildup of nutrient pools (multi-functionality) is enhanced by the number of perennial plant species, mainly shrubs and dwarf-shrubs, whereas increased average annual temperature reduces this ability.

While small-scale controlled experiments have provided evidence of the positive relationship between biodiversity and multi-functionality over the years, this study is the first in explicitly evaluating such relationship among real ecosystems at a global scale.

The fieldwork of this study was carried out in 224 dryland ecosystems from all continents except Antarctica, where direct measurements of plant diversity and other biotic and abiotic features of the ecosystem were taken. To assess ecosystem multi-functionality, researchers assessed more than 2,600 soil samples for 14 ecosystem functions related to carbon, nitrogen and phosphorus cycling and storage.

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Contact: Andrew Lavin
andrewlavin@alavin.com
516-353-2505
American Associates, Ben-Gurion University of the Negev
Source:Eurekalert

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