Diversity emerging: from competitive exclusion to neutral coexistence in ecosystems
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In this communication, we present a unifying framework to understand the emergence and maintenance of diversity in ecological systems. We do this by developing a deterministic population model including density-dependent limitation in resources and available space. Our model shows that competitive exclusion and neutral coexistence represent different regimes of the same adaptive dynamics suggesting that neutrality is the general result of an adaptive process in a finite habitat with limited energetic resources. Our model explains the emergence of biodiversity through mutation and its maintenance through neutrality. We show that this framework provides the theoretical foundations to understand the emergence and maintenance of diversity in microbial ecosystems.
KeywordsEmergence Diversity Adaptive dynamics Competition Neutrality
We thank Hans Metz, David Krakauer, Sander van Doorn, Elhanan Borenstein, Geoffrey West, and three anonymous reviewers for constructive criticisms, insights, and discussions. PAM acknowledges support from a John Simon Guggeheim Felowship and grants FONDAP-FONDECYT 1501-0001, ICM P05-02, Basal Financing Program CONICYT-PFB-023, the working group Unifying theories in ecology at the National Center for Ecological Analysis and Synthesis, a Center funded by NSF (grant no. DEB-0072909), the University of California, and the Santa Barbara campus, and SFI International Program. JEK acknowledges TU Delft for startup support.
- Diekmann O (2004) A beginner’s guide to adaptive dynamics. Banach Cent Publ 63:47–86Google Scholar
- Finkel SE, Zinser E, Kolter R (2000) Long-term survival and evolution in the stationary phase. In: Storz G, Hengge-Aronis R (eds) Bacterial stress responses. ASM Press, Washington DC, pp 231–238Google Scholar
- Hubbell SP (2001) The unified neutral theory of biodiversity and biogegraphy. Princeton University Press, PrincetonGoogle Scholar
- Metz JAJ, Geritz SAH, Meszena G, Jacobs FJA, Van Heerwaarden JS (1996) Adaptive dynamics, a geometrical study of the consequences of nearly faithful reproduction. In: van Strien SJ, Verduyn Lunel SM (eds) Stochastic and spatial structures of dynamical systems. North Holland, Amsterdam, pp 183–231Google Scholar
- Morita RY (1997) Bacteria in oligotrophic environments: starvation-survival lifestyle. Chapman & Hall, LondonGoogle Scholar
- Odling-Smee FJ, Laland KN, Feldman MW (2003) Niche construction: the neglected process in evolution. In: Monographs in population biology. Princeton University Press, PrincetonGoogle Scholar
- Roughgarden JR (1998) Primer of ecological theory. Prentice-Hall, Englewood CliffsGoogle Scholar
- Tilman D (1982) Resource competition and community structure. In: Monographs in population biology. Princeton University Press, PrincetonGoogle Scholar
- Tilman D, Pacala S (1993) The maintenance of species richness in plant communities. In: Ricklefs RE, Schluter D (eds) Species diversity in ecological communities. University of Chicago Press, Chicago, pp 13–25Google Scholar
- Vulić M, Kolter R (2001) Evolutionary cheating in Escherichia coli stationary phase cultures. Genetics (USA) 158:519–526Google Scholar
- Zinzer ER, Kolter R (1999) Mutations enhancing amino acid catabolism confer a growth advantage in stationary phase. J Bacteriol 181:5800–5807Google Scholar