Exploitation ecosystems in heterogeneous habitat complexes II : Impact of small-scale heterogeneity on predator-prey dynamics

摘要: The model of exploitation ecosystems was re-analysed, assuming that habitat patches are so small they form only parts the home range an individual predator. For complexes where productive abound, results suggested predation will strongly spill over from patches, which set tune for population dynamics within whole landscape, to barren ones. This result conforms one obtained by T. Oksanen despotic choice and essentially larger patch sizes. heavily dominated habitat, spillover predicted be weak, as case in her large model. Unlike analysis, however, pressure substantially reduced also habitat. In exploited a fine-grained manner, always found more intense contrary predictions original ecosystems. analysis thus suggests their is applicable mainly on landscape level. On level habitats, applicability depends configuration (at its best prevailing moderate-sized habitat) generally decreases with decreasing