Diversity, Functional Similarity, and Top-Down Control Drive Synchronization and the Reliability of Ecosystem Function.

Bauer, Barbara, Vos, Matthijs, Klauschies, Toni and Gaedke, Ursula (2014) Diversity, Functional Similarity, and Top-Down Control Drive Synchronization and the Reliability of Ecosystem Function. The American Naturalist, 183 (3). pp. 394-409. DOI 10.1086/674906.

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Abstract

The concept that diversity promotes reliability of ecosystem function depends on the pattern that community-level biomass shows lower temporal variability than species-level biomasses. However, this pattern is not universal, as it relies on compensatory or independent species dynamics. When in contrast within–trophic level synchronization occurs, variability of community biomass will approach population-level variability. Current knowledge fails to integrate how species richness, functional distance between species, and the relative importance of predation and competition combine to drive synchronization at different trophic levels. Here we clarify these mechanisms. Intense competition promotes compensatory dynamics in prey, but predators may at the same time increasingly synchronize, under increasing species richness and functional similarity. In contrast, predators and prey both show perfect synchronization under strong top-down control, which is promoted by a combination of low functional distance and high net growth potential of predators. Under such conditions, community-level biomass variability peaks, with major negative consequences for reliability of ecosystem function.

Document Type: Article
Additional Information: WOS:000331599200010
Keywords: biodiversity, ecosystem services, population dynamics, predator-prey system, species richness, synchrony
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1086/674906
ISSN: 0003-0147
Projects: AQUASHIFT
Date Deposited: 22 Apr 2014 12:34
Last Modified: 21 Jan 2019 12:33
URI: http://oceanrep.geomar.de/id/eprint/24344

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