Biodiversity, productivity, and the spatial insurance hypothesis revisited

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/79255 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/79255 http://eprints.org/relation/isIndexCodesVersionOf https://pure.iiasa.ac.at/id/document/79255 archive 351 disk0/00/01/14/30 2016-01-15 08:53:14 2021-08-27 17:25:06 2016-01-15 08:53:14 article show Shanafelt D.W. Dieckmann U. 1668 0000-0001-7089-0393 Jonas M. 1351 0000-0003-1269-4145 Franklin O. 1791 0000-0002-0376-4140 Loreau M. Perrings C. Biodiversity, productivity, and the spatial insurance hypothesis revisited pub iis_env iis_ecl prog_asa prog_eep prog_esm dispersal; stability; stochasticity; risk Accelerating rates of biodiversity loss have led ecologists to explore the effects of species richness on ecosystem functioning and the flow of ecosystem services. One explanation of the relationship between biodiversity and ecosystem functioning lies in the spatial insurance hypothesis, which centers on the idea that productivity and stability increase with biodiversity in a temporally varying, spatially heterogeneous environment. However, there has been little work on the impact of dispersal where environmental risk are more or less spatially correlated, or where dispersal rates are variable. In this paper, we extend the original Loreau model to consider stochastic temporal variation in resource availability, which we refer to as "environmental risk", and heterogeneity in species dispersal rates. We find that asynchronies across communities and species provide community-level stabilizing effects on productivity, despite varying levels of species richness. Although intermediate dispersal rates play a role in mitigating risk, they are less effective in insuring productivity against global (metacommunity-level) than local (individual community-level) risks. These results are particularly interesting given the emergence of global sources of risk such as climate change or the closer integration of world markets. Our results offer deeper insights into the Loreau model and new perspectives on the effectiveness of spatial insurance in the face of environmental risks. 2015-09 published Elsevier 10.1016/j.jtbi.2015.06.017 XJ-15-132 Journal of Theoretical Biology; 380:426-435 (September 2015) (Published online 20 June 2015) [doi:10.1016/j.jtbi.2015.06.017] 66 138 95 public Journal of Theoretical Biology 380 426-435 TRUE 1095-8541 FALSE info:eu-repo/semantics/article