Lion Sébastien, van Baalen Minus, Wilson William G
Fonctionnement et évolution des systèmes écologiques, UMR 7625, Université Pierre et Marie Curie, Bât. A, 7ème étage CC237, 7, quai St-Bernard, 75252 Paris Cedex 05, France.
Proc Biol Sci. 2006 May 7;273(1590):1063-71. doi: 10.1098/rspb.2005.3412.
We investigate the evolution of manipulation of host dispersal behaviour by parasites using spatially explicit individual-based simulations. We find that when dispersal is local, parasites always gain from increasing their hosts' dispersal rate, although the evolutionary outcome is determined by the costs-to-benefits ratio. However, when dispersal can be non-local, we show that parasites investing in an intermediate dispersal distance of their hosts are favoured even when the manipulation is not costly, due to the intrinsic spatial dynamics of the host-parasite interaction. Our analysis highlights the crucial importance of ecological spatial dynamics in evolutionary processes and reveals the theoretical possibility that parasites could manipulate their hosts' dispersal.
我们使用基于个体的空间显式模拟来研究寄生虫对宿主扩散行为的操控演变。我们发现,当扩散是局部性的时,尽管进化结果由成本效益比决定,但寄生虫总是能从提高其宿主的扩散率中获益。然而,当扩散可以是非局部性的时,我们表明,即使操控成本不高,由于宿主 - 寄生虫相互作用的内在空间动态,投资于宿主中间扩散距离的寄生虫也会受到青睐。我们的分析突出了生态空间动态在进化过程中的至关重要性,并揭示了寄生虫可能操控其宿主扩散的理论可能性。