Asymmetric or diffusive co-evolution generates meta-populations in fig-fig wasp mutualisms  

作　　者：WANG RuiWu YANG Yan WIGGINS Natasha L. 

机构地区：[1]State Key Laboratory of Genetic Resources and Evolution,Kunming Institute of Zoology,Chinese Academy of Sciences [2]School of Plant Science,University of Tasmania

出　　处：《Science China(Life Sciences)》2014年第6期596-602,共7页中国科学（生命科学英文版）

基　　金：supported by the National Natural Science Foundation of China (NSFC) (31270433,31170408);National Science Fund for Distinguished Young Scholars (31325005);NSFC-Yunnan United Fund (U1302267);the West Light Foundation of the Chinese Academy of Sciences;the Special Fund for the Excellent Youth of the Chinese Academy of Sciences (KSCX2-EW-Q-9)

摘　　要：Co-evolutionary theory assumes co-adapted characteristics are a positive response to counter those of another species,whereby co-evolved species reach an evolutionarily stable interaction through bilateral adaptation.However,evidence from the fig-fig wasp mutualistic system implies very different co-evolutionary selection mechanisms,due to the inherent conflict among interacted partners.Fig plants appear to have discriminatively enforced fig wasps to evolve"adaptation characteristics"that provide greater benefit to the fig,and fig wasps appear to have diversified their evolutionary strategies in response to discriminative enforcement by figs and competition among different fig wasp species.In what appears to be an asymmetric interaction,the prosperity of cooperative pollinating wasps should inevitably lead to population increases of parasitic individuals,thus resulting in localized extinctions of pollinating wasps.In response,the sanctioning of parasitic wasps by the fig should lead to a reduction in the parasitic wasp population.The meta-populations created by such asymmetric interactions may result in each population of coevolved species chaotically oscillated,temporally or evolutionarily.Co-evolutionary theory assumes co-adapted characteristics are a positive response to counter those of another species,whereby co-evolved species reach an evolutionarily stable interaction through bilateral adaptation. However,evidence from the fig-fig wasp mutualistic system implies very different co-evolutionary selection mechanisms,due to the inherent conflict among interacted partners. Fig plants appear to have discriminatively enforced fig wasps to evolve ＂adaptation characteristics＂ that provide greater benefit to the fig,and fig wasps appear to have diversified their evolutionary strategies in response to discriminative enforcement by figs and competition among different fig wasp species. In what appears to be an asymmetric interaction,the prosperity of cooperative pollinating wasps should inevitably lead to population increases of parasitic individuals,thus resulting in localized extinctions of pollinating wasps. In response,the sanctioning of parasitic wasps by the fig should lead to a reduction in the parasitic wasp population. The meta-populations created by such asymmetric interactions may result in each population of coevolved species chaotically oscillated,temporally or evolutionarily.

关 键 词：asymmetric co-evolution inter-specific cooperation META-POPULATION MUTUALISM 

分 类 号：Q968[生物学—昆虫学]