Consumption threshold used to investigate stability and ecological dominance in consumer-resource dynamics
Collins, Obiora Cornelius
Duffy, Kevin Jan
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Copyright: 2015. Elsevier. Due to copyright restrictions, only the abstract is available. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in Ecological Modelling, Vol 103. Pp 155-162. http://www.sciencedirect.com/science/article/pii/S0304380015001581#
Understanding consumer resource population dynamics can be important to an understanding of the overall ecology of systems. For example, the tree-grass continuum dynamics of savannas, an important ecological biome, is inﬂuenced by the population dynamics. Here we investigate herbivory driven popu-lation dynamics of a savanna using a simple model of the interactions of the dominant players, namely: trees, grasses, browsers, grazers and mixed browsers-grazers. We introduce a consumption threshold that summarises some of the parameters and this is used as a guide to understanding the dynamics. This number is used in investigating system stability and sensitivity to parameter ﬂuctuations. It is also used to identify degrees of ecological dominance.
Collins, O.C. and Duffy, K.J. 2015. Consumption threshold used to investigate stability and ecological dominance in consumer-resource dynamics. Ecological Modelling. 319: 155–162.