A New P System to Model the Subalpine and Alpine Plant Communities

In this work we present a P system based model of the ecosystem dynamics of plant communities. It is applied to four National Hunting Reservoirs in Catalan Pyrenees (Spain). In previous works several natural highmountainecosystems and population dynamics were modeled, but in those works grass was considered unlimited and changes in plant communities were not taken into account. In our new model we take advantage of the modularity of P systems, adding the plant communities to an existing model on scavengers dynamics [6]. We introduce the plant community production and two possible changes or evolutions in communities: (1) due to less grazing pressure, and (2) due to recovering pastures with human management as for example fire or clearing.