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Initial community evenness favours functionality under selective stress

Abstract

Owing to the present global biodiversity crisis, the biodiversity–stability relationship and the effect of biodiversity on ecosystem functioning have become major topics in ecology1,2,3. Biodiversity is a complex term that includes taxonomic, functional, spatial and temporal aspects of organismic diversity, with species richness (the number of species) and evenness (the relative abundance of species) considered among the most important measures4,5. With few exceptions (see, for example, ref. 6), the majority of studies of biodiversity-functioning and biodiversity–stability theory have predominantly examined richness7,8,9,10,11. Here we show, using microbial microcosms, that initial community evenness is a key factor in preserving the functional stability of an ecosystem. Using experimental manipulations of both richness and initial evenness in microcosms with denitrifying bacterial communities, we found that the stability of the net ecosystem denitrification in the face of salinity stress was strongly influenced by the initial evenness of the community. Therefore, when communities are highly uneven, or there is extreme dominance by one or a few species, their functioning is less resistant to environmental stress. Further unravelling how evenness influences ecosystem processes in natural and humanized environments constitutes a major future conceptual challenge.

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Figure 1: Lorenz curves used in the experiment.
Figure 2: Contribution of increasing initial unevenness (Gini coefficient) to the functionality of the ecosystem (that is, net denitrification after 20 h of incubation).
Figure 3: Microbial functionality in relation to the initial evenness, for different types of stresses.

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References

  1. Hooper, D. U. et al. Effects of biodiversity on ecosystem functioning: A consensus of current knowledge. Ecol. Monogr. 75, 3–35 (2005)

    Article  Google Scholar 

  2. Loreau, M. et al. Biodiversity and ecosystem functioning: Current knowledge and future challenges. Science 294, 804–808 (2001)

    Article  ADS  CAS  Google Scholar 

  3. McCann, K. S. The diversity-stability debate. Nature 405, 228–233 (2000)

    Article  CAS  Google Scholar 

  4. Purvis, A. & Hector, A. Getting the measure of biodiversity. Nature 405, 212–219 (2000)

    Article  CAS  Google Scholar 

  5. Wilsey, B. J. & Potvin, C. Biodiversity and ecosystem functioning: Importance of species evenness in an old field. Ecology 81, 887–892 (2000)

    Article  Google Scholar 

  6. Balvanera, P., Kremen, C. & Martinez-Ramos, M. Applying community structure analysis to ecosystem function: examples from pollination and carbon storage. Ecol. Appl. 15, 360–375 (2005)

    Article  Google Scholar 

  7. Bell, T., Newman, J. A., Silverman, B. W., Turner, S. L. & Lilley, A. K. The contribution of species richness and composition to bacterial services. Nature 436, 1157–1160 (2005)

    Article  ADS  CAS  Google Scholar 

  8. Cardinale, B. J., Palmer, M. A. & Collins, S. L. Species diversity enhances ecosystem functioning through interspecific facilitation. Nature 415, 426–429 (2002)

    Article  ADS  CAS  Google Scholar 

  9. Loreau, M. & Hector, A. Partitioning selection and complementarity in biodiversity experiments. Nature 412, 72–76 (2001)

    Article  ADS  CAS  Google Scholar 

  10. Naeem, S. & Li, S. Biodiversity enhances ecosystem reliability. Nature 390, 507–509 (1997)

    Article  ADS  CAS  Google Scholar 

  11. Sankaran, M. & McNaughton, S. J. Determinants of biodiversity regulate compositional stability of communities. Nature 401, 691–693 (1999)

    Article  ADS  CAS  Google Scholar 

  12. Griffiths, B. S., Bonkowski, M., Roy, J. & Ritz, K. Functional stability, substrate utilisation and biological indicators of soils following environmental impacts. Appl. Soil Ecol. 16, 49–61 (2001)

    Article  Google Scholar 

  13. Huber, J. A. et al. Microbial population structures in the deep marine biosphere. Science 318, 97–100 (2007)

    Article  ADS  CAS  Google Scholar 

  14. Wilsey, B. J. & P. o. l. l. e. y. H. W. Reductions in grassland species evenness increase dicot seedling invasion and spittle bug infestation. Ecol. Lett. 5, 676–684 (2002)

    Article  Google Scholar 

  15. Wu, T., Chellemi, D. O., Graham, J. H., Martin, K. J. & Rosskopf, E. N. Comparison of soil bacterial communities under diverse agricultural land management and crop production practices. Microb. Ecol. 55, 293–310 (2008)

    Article  Google Scholar 

  16. Yang, D. R., Peng, Y. Q., Yang, P. & Guan, J. M. The community structure of insects associated with figs at Xishuangbanna, China. Symbiosis 45, 153–157 (2008)

    Google Scholar 

  17. Jessup, C. M. et al. Big questions, small worlds: microbial model systems in ecology. Trends Ecol. Evol. 19, 189–197 (2004)

    Article  Google Scholar 

  18. Kassen, R., Buckling, A., Bell, G. & Rainey, P. B. Diversity peaks at intermediate productivity in a laboratory microcosm. Nature 406, 508–512 (2000)

    Article  ADS  CAS  Google Scholar 

  19. Prosser, J. I. et al. The role of ecological theory in microbial ecology. Nature Rev. Microbiol. 5, 384–392 (2007)

    Article  CAS  Google Scholar 

  20. Philippot, L. & Hallin, S. Finding the missing link between diversity and activity using denitrifying bacteria as a model functional community. Curr. Opin. Microbiol. 8, 234–239 (2005)

    Article  CAS  Google Scholar 

  21. Chapin, F. S. et al. Consequences of changing biodiversity. Nature 405, 234–242 (2000)

    Article  CAS  Google Scholar 

  22. Decho, A. W. Microbial biofilms in intertidal systems: an overview. Cont. Shelf Res. 20, 1257–1273 (2000)

    Article  ADS  Google Scholar 

  23. Horner-Devine, M. C., Carney, K. M. & Bohannan, B. J. M. An ecological perspective on bacterial biodiversity. Proc. R. Soc. Lond. B 271, 113–122 (2004)

    Article  Google Scholar 

  24. Symonds, M. R. E. & Johnson, C. N. Species richness and evenness in Australian birds. Am. Nat. 171, 480–490 (2008)

    Article  Google Scholar 

  25. Caron, J. B. & Jackson, D. A. Paleoecology of the Greater Phyllopod Bed community, Burgess Shale. Palaeogeogr. Palaeoclimatol. Palaeoecol. 258, 222–256 (2008)

    Article  Google Scholar 

  26. Yachi, S. & Loreau, M. Biodiversity and ecosystem productivity in a fluctuating environment: The insurance hypothesis. Proc. Natl Acad. Sci. USA 96, 1463–1468 (1999)

    Article  ADS  CAS  Google Scholar 

  27. Gitay, H., Wilson, J. B. & Lee, W. G. Species redundancy: A redundant concept? J. Ecol. 84, 121–124 (1996)

    Article  Google Scholar 

  28. Walker, B. H. Biodiversity and ecological redundancy. Conserv. Biol. 6, 18–23 (1992)

    Article  Google Scholar 

  29. Montgomery, H. A. C. & Dymock, J. F. The determination of nitrite in water. Analyst 86, 414–416 (1961)

    CAS  Google Scholar 

  30. Kutner, M. H., Nachtsheim, C. J. & Neter, J. Applied Linear Regression Models 4th edn (McGraw-Hill Irwin, 2004)

    Google Scholar 

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Acknowledgements

We are grateful to R. Amann for comments on the original manuscript and to P. Van Damme for practical assistance. This work was supported by the Institute for the Promotion of Innovation through Science and Technology in Flanders (IWT-Vlaanderen) (to L.W.), by an Interuniversity Attraction Pole research network grant of the Belgian government, Belgian Science Policy (to L.C.), by ‘Program Master and Back’ from Regione Sardegna (Italy; to A.B.), by ‘Programma dell’Università per la Ricerca, PUR 2008’ (ex FIRST) of the University of Milan (to D.D.), and by the Geconcerteerde Onderzoeksactie of Ghent University contract grant of the Ministerie van de Vlaamse Gemeenschap, Bestuur Wetenschappelijk Onderzoek (Belgium; to K.H., P.D.V., W.V. and N.B.).

Author Contributions L.W., M.M. and N.B. had the original idea for the experiment. The laboratory work was conducted by L.W., M.M., A.B. and K.H. The experimental design and statistical analyses were organized and performed by L.C. The manuscript was written principally by L.W., M.M. and L.C., with extensive input from D.D., K.H., P.D.V., W.V. and N.B.

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Correspondence to Nico Boon.

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This file contains Supplementary Methods, Supplementary Figures S1-S5 with Legends and Supplementary Tables S1-S3 (PDF 241 kb)

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Wittebolle, L., Marzorati, M., Clement, L. et al. Initial community evenness favours functionality under selective stress. Nature 458, 623–626 (2009). https://doi.org/10.1038/nature07840

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