Reference : Measuring the importance of competition: a new formulation of the problem
Scientific journals : Article
Life sciences : Agriculture & agronomy
Life sciences : Environmental sciences & ecology
Life sciences : Phytobiology (plant sciences, forestry, mycology...)
http://hdl.handle.net/2268/135205
Measuring the importance of competition: a new formulation of the problem
English
Damgaard, Christian mailto []
Fayolle, Adeline mailto [Université de Liège - ULg > Forêts, Nature et Paysage > Gestion des ressources forestières et des milieux naturels >]
2010
Journal of Ecology
Blackwell Publishing
98
1-6
Yes (verified by ORBi)
International
0022-0477
[en] Competition ; Ecological success ; Environmental gradient ; Fitness ; Importance ; Intensity ; Population dynamics
[en] 1. Currently, there is a debate among plant ecologists on the concepts of the intensity of competition and the importance of competition, which is central to many issues of modern plant population ecology and plant community ecology.
2. It is problematic that the current measures of intensity and importance of competition, typically, are reported as dimensionless indices because they hide the fact that both indices are functions of plant density and the level of the environmental gradient.
3. Here, a new formulation of the concepts is suggested, which explicitly highlights the functional dependencies on plant density and the level of the environmental gradient. The new measures are a generalization of the previous indices and correspond to the previous indices in the case of a simple experimental design.
4. The suggested measures of the intensity and importance of competition are exemplified using data from a response surface competition experiment between Agrostis capillaris and Festuca ovina along a herbicide gradient, where the expected clear effect of plant density was demonstrated.
5. Synthesis. As the suggested measures of the intensity and importance of competition explicitly highlight the functional dependencies on plant density and the level of the environmental gradient, we think that they will help to ensure a closer connection between experimental plant ecology and the attempts to model plant populations and communities.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/135205
10.1111/j.1365-2745.2009.01587.x

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