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BioRisk 4: 131-147
doi:
10.3897/biorisk.4.48
Published:
06 Jul 2010
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Authors
Wolfgang Nentwig 
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Community Ecology, University of Bern, Bern, Bern, Switzerland
Community Ecology, University of Bern, Bern, Switzerland
Conflict of interest
The authors have declared that no competing interests exist.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.