Rotifer population spread in relation to food, density and predation risk in an experimental system.

摘要: Summary 1. Despite the popular use of diffusion models to predict spatial spread populations over time, we currently know little about how rates change with state environment or internal condition individuals. To address this gap in our understanding, measured for many rotifer Brachionus calyciflorus a suite wellreplicated experiments. 2. In one set experiments, manipulated food availability and population density along continuous range densities. second set, entire via deprivation exposure predator kairomones. 3. Across replicate populations, were positively correlated conspecific density. Diffusion negatively availability, especially when was high. food-deprived those exposed predation risk lower than controls. 4. Our results provide direct experimental evidence that are conditional on density, body risk.