Coexistence in stochastic environments through a life history trade off in Drosophila

摘要: The coexistence of competing species may be mediated by various mechanisms including resource partitioning and kinds environmental heterogeneity. In this paper we show how differences in life history enhance stochastic environments. Drosophila species, as many other taxa, the developmental period is proportional to adult survival. A short period, i.e. a high rate, enhances competitive ability larvae. High survival, on hand, must increase probability reaching new breeding sites space time. We present model two investigate consequences trade off. features density dependent mortality (due competition) larval stage, age stage. Breeding opportunities occur with certain per time step. This only component model. demonstrates that fast growing, lived are superior when frequent. Slower long rare sensitivity analysis indicates conclusion qualitatively robust. mutual invasibility criterion reveals stable will for feeding probabilities.