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| Titel |
The relative importance of seed competition, resource competition and perturbations on community structure |
| VerfasserIn |
K. Bohn, J. G. Dyke, R. Pavlick, B. Reineking, B. Reu, A. Kleidon |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 8, no. 5 ; Nr. 8, no. 5 (2011-05-11), S.1107-1120 |
| Datensatznummer |
250005809
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| Publikation (Nr.) |
 copernicus.org/bg-8-1107-2011.pdf |
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| Zusammenfassung |
| While the regional climate is the primary selection pressure for
whether a plant strategy can survive, however, competitive
interactions strongly affect the relative abundances of plant
strategies within communities. Here, we investigate the relative
importance of competition and perturbations on the development of
vegetation community structure.
To do so,
we develop DIVE (Dynamics and Interactions of VEgetation), a simple
general model that links plant strategies to their competitive dynamics,
using growth and reproduction characteristics that emerge from
climatic constraints. The model calculates population dynamics based on establishment,
mortality, invasion and exclusion in the presence of different strengths
of perturbations, seed and resource competition. The highest levels of diversity were found in simulations
without competition as long as mortality is not too high. However,
reasonable successional dynamics were only achieved when resource
competition is considered. Under high levels of competition, intermediate
levels of perturbations were required to obtain coexistence.
Since succession and coexistence are observed in plant communities,
we conclude that the DIVE model with competition and intermediate levels of
perturbation represents an adequate way to model population dynamics.
Because of the simplicity and generality of DIVE, it could be used to understand vegetation
structure and functioning at the global scale and the response of vegetation to global change. |
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