Water Limitation and Negative Plant-soil Feedback Explain Vegetation Patterns along Rainfall Gradient
2013
Marasco, Addolorata | Iuorio, Annalisa | Cartenì, Fabrizio | Bonanomi, Giuliano | Giannino, Francesco | Mazzoleni, Stefano
The formation of vegetation patterns has been widely studied and discussed over the years and it has been related to two different mechanisms: depletion of water in the center of vegetation patches and production of toxicity by the decomposition of plant residues in soil. In this work we present a spatially explicit model that combines these two processes showing that negative plant-soil feedbacks can explain the development of different vegetation patterns also when water is not a limiting factor. This also demonstrates that the toxicity effects may change the stability properties of the vegetation patterns.
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