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Science 27 July 2001:
Vol. 293. no. 5530, pp. 650 - 655
DOI: 10.1126/science.1062586

Review

Long-Term Studies of Vegetation Dynamics

Mark Rees,1* Rick Condit,2 Mick Crawley,1 Steve Pacala,3 Dave Tilman4

By integrating a wide range of experimental, comparative, and theoretical approaches, ecologists are starting to gain a detailed understanding of the long-term dynamics of vegetation. We explore how patterns of variation in demographic traits among species have provided insight into the processes that structure plant communities. We find a common set of mechanisms, derived from ecological and evolutionary principles, that underlie the main forces shaping systems as diverse as annual plant communities and tropical forests. Trait variation between species maintains diversity and has important implications for ecosystem processes. Hence, greater understanding of how Earth's vegetation functions will likely require integration of ecosystem science with ideas from plant evolutionary, population, and community ecology.

1 Imperial College and NERC Centre for Population Biology, Silwood Park, Ascot, Berks SL5 7PY, UK.
2 Smithsonian Tropical Research Institute, Center for Tropical Forest Science, Unit 0948, APO, AA 34002, USA.
3 Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA.
4 Department of Ecology, Evolution and Behavior, University of Minnesota, St. Paul, MN 55108, USA.
*   To whom correspondence should be addressed. E-mail: mrees{at}ic.ac.uk


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Science. ISSN 0036-8075 (print), 1095-9203 (online)