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Species divergence and trait convergence in experimental plant community assembly

Fukami, T. and Bezemer, T.M. and Mortimer, S.R. and Van der Putten, W.H. (2005) Species divergence and trait convergence in experimental plant community assembly. Ecology Letters, 8, 1283-1290. ISSN 1461-023X.

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Despite decades of research, it remains controversial whether ecological communities converge towards a common structure determined by environmental conditions irrespective of assembly history. Here, we show experimentally that the answer depends on the level of community organization considered. In a 9-year grassland experiment, we manipulated initial plant composition on abandoned arable land and subsequently allowed natural colonization. Initial compositional variation caused plant communities to remain divergent in species identities, even though these same communities converged strongly in species traits. This contrast between species divergence and trait convergence could not be explained by dispersal limitation or community neutrality alone. Our results show that the simultaneous operation of trait-based assembly rules and species-level priority effects drives community assembly, making it both deterministic and historically contingent, but at different levels of community organization. [KEYWORDS: Alternative states ; assembly history ; assembly rules ; community convergence ; dispersal limitation ; ecological restoration ; historical contingency ; neutral theory ; priority effects ; succession]

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:11703
Deposited On:23 Nov 2011 01:00
Last Modified:31 Mar 2014 10:34

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