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Determinants of biodiversity regulate compositional stability of communities

Nature volume 401, pages 691–693 (1999)Cite this article

Abstract

The world is witnessing a decline in biodiversity which may be greater in magnitude than even previous mass-extinction events1,2,3. This has rekindled interest in the relationships between biodiversity and the stability of community and ecosystem processes4 that have been reported in some empirical studies5,6,7. Diversity has been linked with community and ecosystem processes8,9,10,11,12,13,14, but disputes remain over whether it is diversity, environmental factors or the variety of functional groups in a community that drive these patterns15,16,17,18,19,20,21. Furthermore, it remains unclear whether variation in diversity resulting from species loss within communities has similar effects on stability as natural variation in diversity associated with gradients in factors that regulate diversity. We believe that, across larger ecological scales, extrinsic determinants of biodiversity such as disturbance regimes and site history may be the primary determinants of certain measures of community stability. Here we use controlled field experiments in savanna grasslands in southern India to demonstrate and explain how low-diversity plant communities can show greater compositional stability when subject to experimental perturbations characteristic of their native environments. These results are best explained by the ecological history and species characteristics of communities rather than by species diversity in itself.

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Figure 1: Compositional stability of communities as related to species diversity.
Figure 2: Patterns of species colonization and loss from plots.

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Acknowledgements

We thank the Tamil Nadu Forest Department for granting permission to work at KMTR, and J. Ratnam for support and comments. We also thank L. L. Wolf, D. Frank, T. R. Shankar Raman and D. Barua for comments; R. Ali, V. Vinatha, K. Kar Gupta, M. Katti, D. Mudappa, N. M. Ishwar, K. Vasudevan and K. S. Gopi for their help; and C. Sankaran, P. Kumar and C. Jayseelan for field assistance. This work was supported by the Wildlife Conservation Society (India), NSF and the Sophie Danforth Conservation Biology Fund.

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  1. Biological Research Laboratories, Syracuse University, Syracuse, 13210-1244, New York, USA

    Mahesh Sankaran & S. J. McNaughton

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  1. Mahesh Sankaran
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  2. S. J. McNaughton
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Correspondence to Mahesh Sankaran.

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Sankaran, M., McNaughton, S. Determinants of biodiversity regulate compositional stability of communities. Nature 401, 691–693 (1999). https://doi.org/10.1038/44368

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