Dispersal frequency affects local biomass production by controlling local diversity.

Matthiessen, Birte and Hillebrand, Helmut (2006) Dispersal frequency affects local biomass production by controlling local diversity. Ecology Letters, 2006 (9). pp. 652-662. DOI 10.1111/j.1461-0248.2006.00916.x.

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Dispersal is a major factor regulating the number of coexisting species, but the relationship between species diversity and ecosystem processes has mainly been analysed for communities closed to dispersal. We experimentally investigated how initial local diversity and dispersal frequency affect local diversity and biomass production in open benthic microalgal metacommunities. Final local species richness and local biomass production were strongly influenced by dispersal frequency but not by initial local diversity. Both final local richness and final local biomass showed a hump-shaped pattern with increasing dispersal frequency, with a maximum at intermediate dispersal frequencies. Consequently, final local biomass increased linearly with increasing final richness. We conclude that the general relationship between richness and ecosystem functioning remains valid in open systems, but the maintenance of ecosystem processes significantly depends on the effects of dispersal on species richness and local interactions.

Document Type: Article
Keywords: Benthic microalgae, dispersal frequency, ecosystem functioning, local biomass production, local diversity, metacommunity, open system
Research affiliation: OceanRep > GEOMAR
OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
Refereed: Yes
DOI etc.: 10.1111/j.1461-0248.2006.00916.x
ISSN: 1461-023X
Date Deposited: 06 Feb 2009 13:52
Last Modified: 23 Feb 2017 07:50
URI: http://eprints.uni-kiel.de/id/eprint/2363

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