The impact of biodiversity loss on the functioning of ecosystems and their ability to provide ecological services has become a central issue in ecology. Several experiments have provided evidence that reduced species diversity may impair ecosystem processes such as plant biomass production1,2,3,4,5. The interpretation of these experiments, however, has been controversial6,7,8,9,10,11,12 because two types of mechanism may operate in combination6,13,14,15. In the ‘selection effect’, dominance by species with particular traits affects ecosystem processes. In the ‘complementarity effect’, resource partitioning or positive interactions lead to increased total resource use. Here we present a new approach to separate the two effects on the basis of an additive partitioning analogous to the Price equation in evolutionary genetics16,17,18,19. Applying this method to data from the pan-European BIODEPTH experiment4 reveals that the selection effect is zero on average and varies from negative to positive in different localities, depending on whether species with lower- or higher-than-average biomass dominate communities. In contrast, the complementarity effect is positive overall, supporting the hypothesis that plant diversity influences primary production in European grasslands through niche differentiation or facilitation.
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Tilman, D., Wedin, D. & Knops, J. Productivity and sustainability influenced by biodiversity in grassland ecosystems. Nature 379, 718–720 (1996).
Tilman, D. et al. The influence of functional diversity and composition on ecosystem processes. Science 277, 1300–1302 (1997).
van der Heijden, M. G. A. et al. Mycorrhizal fungal diversity determines plant biodiversity, ecosystem variability and productivity. Nature 396, 69–72 (1998).
Hector, A. et al. Plant diversity and productivity experiments in European grasslands. Science 286, 1123–1127 (1999).
Schläpfer, F. & Schmid, B. Ecosystem effects of biodiversity: a classification of hypotheses and exploration of empirical results. Ecol. Appl. 9, 893–912 (1999).
Huston, M. A. Hidden treatments in ecological experiments: re-evaluating the ecosystem function of biodiversity. Oecologia 110, 449–460 (1997).
Aarssen, L. W. High productivity in grassland ecosystems: effected by species diversity or productive species? Oikos 80, 183–184 (1997).
Tilman, D. Distinguishing the effects of species diversity and species composition. Oikos 80, 185 (1997).
Wardle, D. A. Is ‘sampling effect’ a problem for experiments investigating biodiversity–ecosystem function relationships? Oikos 87, 403–407 (1999).
van der Heijden, M. G. A. et al. ‘Sampling effect’, a problem in biodiversity manipulation? A reply to David A. Wardle. Oikos 87, 408–410 (1999).
Huston, M. A. et al. No consistent effect of plant diversity on productivity. Science 289, 1255 (2000).
Hector, A. et al. No consistent effect of plant diversity on productivity: Response. Science 289, 1255 (2000).
Tilman, D., Lehman, C. & Thompson, K. Plant diversity and ecosystem productivity: theoretical considerations. Proc. Natl Acad. Sci. USA 94, 1857–1861 (1997).
Loreau, M. Biodiversity and ecosystem functioning: a mechanistic model. Proc. Natl Acad. Sci. USA 95, 5632–5636 (1998).
Loreau, M. Biodiversity and ecosystem functioning: recent theoretical advances. Oikos 91, 3–17 (2000).
Price, G. R. Selection and covariance. Nature 227, 520–521 (1970).
Price, G. R. Extension of covariance selection mathematics. Ann. Hum. Genet. 35, 485–490 (1972).
Frank, S. A. George Price's contributions to evolutionary genetics. J. Theor. Biol. 175, 373–388 (1995).
Frank, S. A. The Price Equation, Fisher's fundamental theorem, kin selection, and causal analysis. Evolution 51, 1712–1729 (1997).
Garnier, E., Navas, M.-L., Austin, M. P., Lilley, J. M. & Gifford, R. M. A problem for biodiversity–productivity studies: how to compare the productivity of multispecific plant mixtures to that of monocultures? Acta Oecol. 18, 657–670 (1997).
Hector, A. The effect of diversity on productivity: detecting the role of species complementarity. Oikos 82, 597–599 (1998).
Loreau, M. Separating sampling and other effects in biodiversity experiments. Oikos 82, 600–602 (1998).
Troumbis, A. Y., Dimitrakopoulos, P. G., Siamantziouras, A.-S. D. & Memtsas, D. Hidden diversity and productivity patterns in mixed Mediterranean grasslands. Oikos 90, 549–559 (2000).
Price, G. R. The nature of selection. J. Theor. Biol. 175, 389–396 (1995).
Jolliffe, P. A. The replacement series. J. Ecol. 88, 371–385 (2000).
We thank S. Yachi, B. Schmid and D. Deutschman for suggestions and all members of BIODEPTH for their input to the project. This work was supported by the CNRS GDR 1936 DIV-ECO and the CNRS PICS Dynamics of biodiversity: from species interactions to ecosystem functioning.
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Loreau, M., Hector, A. Partitioning selection and complementarity in biodiversity experiments. Nature 412, 72–76 (2001). https://doi.org/10.1038/35083573
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