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- W2045137078 abstract "We consider host–parasitoid systems spatially distributed on a row of patches connected by dispersal. We analyze the effects of dispersal frequency, dispersal asymmetry, number of patches and environmental gradients on the stability of the host–parasitoid interactions. To take into account dispersal frequency, the hosts and parasitoids are allowed to move from one patch to a neighboring patch a certain number of times within a generation. When this number is high, aggregation methods can be used to simplify the proposed initial model into an aggregated model describing the dynamics of both the total host and parasitoid populations. We show that as the number of patches increases less asymmetric parasitoid dispersal rates are required for stability. We found that the ‘CV 2 >1 rule’ is a valid approximation for stability if host growth rate is low, otherwise the general condition of stability we establish should be preferred. Environmental variability along the row of patches is introduced as gradients on host growth rate and parasitoid searching efficiency. We show that stability is more likely when parasitoids move preferentially towards patches where they have high searching efficiency or when hosts go mainly to patches where they have a low growth rate." @default.
- W2045137078 created "2016-06-24" @default.
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- W2045137078 date "2005-03-17" @default.
- W2045137078 modified "2023-10-15" @default.
- W2045137078 title "Effects of asymmetric dispersal and environmental gradients on the stability of host-parasitoid systems" @default.
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- W2045137078 doi "https://doi.org/10.1111/j.0030-1299.2005.13492.x" @default.
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