منابع مشابه
The impact of parasitoid emergence time on host-parasitoid population dynamics.
We investigate the effect of parasitoid phenology on host-parasitoid population cycles. Recent experimental research has shown that parasitized hosts can continue to interact with their unparasitized counterparts through competition. Parasitoid phenology, in particular the timing of emergence from the host, determines the duration of this competition. We construct a discrete-time host-parasitoi...
متن کاملHost-parasitoid spatial dynamics in heterogeneous landscapes
This paper explores the effect of spatial processes in a heterogeneous environment on the dynamics of a hostparasitoid interaction. The environment consists of a lattice of favourable (habitat) and hostile (matrix) hexagonal cells, whose spatial distribution is measured by habitat proportion and spatial autocorrelation (inverse of fragmentation). At each time step, a fixed fraction of both popu...
متن کاملDensity-dependent parasitoid recruitment per parasitized host: effects on parasitoid-host dynamics.
Models of parasitoid-host dynamics are analyzed that include direct density dependence in the host population and either parasitoid- or host-density-dependent variation in parasitoid recruitment per parasitized host (parasitoid "yield"). The principal question addressed is how these forms of density dependence in parasitoid dynamics combine with aggregated parasitism to affect the stability of ...
متن کاملPopulation dynamics and sex ratio of a parasitoid altered by fungal-infected diet of host butterfly.
Variation of host quality affects population dynamics of parasitoids, even at the landscape scale. What causes host quality to vary and the subsequent mechanisms by which parasitoid population dynamics are affected can be complex. Here, we examine the indirect interaction of a plant pathogen with a parasitoid wasp. Under laboratory conditions, parasitoids from hosts fed fungus-infected plants w...
متن کاملStrong dispersal in a parasitoid wasp overwhelms habitat fragmentation and host population dynamics.
The population dynamics of a parasite depend on species traits, host dynamics and the environment. Those dynamics are reflected in the genetic structure of the population. Habitat fragmentation has a greater impact on parasites than on their hosts because resource distribution is increasingly fragmented for species at higher trophic levels. This could lead to either more or less genetic structu...
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ژورنال
عنوان ژورنال: Journal of Animal Ecology
سال: 2000
ISSN: 0021-8790,1365-2656
DOI: 10.1046/j.1365-2656.2000.00445.x