Re-Structuring of Marine Communities Exposed to Environmental Change: A Global Study on the Interactive Effects of Species and Functional Richness.

Wahl, Martin , Link, Heike, Alexandridis, Nicolaos, Thomason, Jeremy C., Cifuentes, Mauricio, Costello, Mark J., da Gama, Bernardo A. P., Hillock, Kristina, Hobday, Alistair J., Kaufmann, Manfred J., Keller, Stefanie, Kraufvelin, Patrik, Krüger, Ina, Lauterbach, Lars, Antunes, Bruno L., Molis, Markus, Nakaoka, Masahiro, Nyström, Julia, bin Radzi, Zulkamal, Stockhausen, Björn, Thiel, Martin, Vance, Thomas, Weseloh, Annika, Whittle, Mark, Wiesmann, Lisa, Wunderer, Laura, Yamakita, Takehisa and Lenz, Mark (2011) Re-Structuring of Marine Communities Exposed to Environmental Change: A Global Study on the Interactive Effects of Species and Functional Richness. Open Access PLoS ONE, 6 (5). e19514. DOI 10.1371/journal.pone.0019514.

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Species richness is the most commonly used but controversial biodiversity metric in studies on aspects of community stability such as structural composition or productivity. The apparent ambiguity of theoretical and experimental findings may in part be due to experimental shortcomings and/or heterogeneity of scales and methods in earlier studies. This has led to an urgent call for improved and more realistic experiments. In a series of experiments replicated at a global scale we translocated several hundred marine hard bottom communities to new environments simulating a rapid but moderate environmental change. Subsequently, we measured their rate of compositional change (re-structuring) which in the great majority of cases represented a compositional convergence towards local communities. Re-structuring is driven by mortality of community components (original species) and establishment of new species in the changed environmental context. The rate of this re-structuring was then related to various system properties. We show that availability of free substratum relates negatively while taxon richness relates positively to structural persistence (i.e., no or slow re-structuring). Thus, when faced with environmental change, taxon-rich communities retain their original composition longer than taxon-poor communities. The effect of taxon richness, however, interacts with another aspect of diversity, functional richness. Indeed, taxon richness relates positively to persistence in functionally depauperate communities, but not in functionally diverse communities. The interaction between taxonomic and functional diversity with regard to the behaviour of communities exposed to environmental stress may help understand some of the seemingly contrasting findings of past research.

Document Type: Article
Keywords: GAME; benthic ecology; biodiversity; environmental change
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-B Experimental Ecology - Benthic Ecology
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.1371/journal.pone.0019514
ISSN: 1932-6203
Projects: GAME, Future Ocean
Date Deposited: 24 May 2011 11:37
Last Modified: 22 Jan 2018 14:12

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