Simulation of Competitive Mechanism for Limited Resources by Two-Species Meta-Populations in Two Patches

摘要

In this study, according to the model of the meta-population of two species competition for two kinds of linear-growth resources which is developed by Liang R.J., STELLA was used to simulate the competition mechanisms of two consumer species in different patches, utilizing the limited resources. The dynamic process was simulated under different situations: When the two species' migration rates are o, which is a particular case that population compete for resource in one patch, the results are accord with R* Principle; When the two species' migration rates are different, the coexistence of the two populations is possible in the patch ; When the two species' individual average resource consumptions rates are different, there exists obvious competing exclusion effect; When the resource growth rates in two patches are different, population density is higher in the patch with a higher resource growth rate, and populations in both patches are apt to coexist with a higher value of q and the distribution of population is partially influenced by the difference between the patches. Because there are still many parameters related with different aspects, it is better to use STELLA to simulate the dynamicity of both the resource and the population by changing the value of any parameter in the model conveniently.