气候变化领域集成服务门户(CCPortal): Why mutualist partners vary in quality: mutation–selection balance and incentives to cheat in the fig tree

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DOI	10.1111/ele.12792
	Why mutualist partners vary in quality: mutation–selection balance and incentives to cheat in the fig tree–fig wasp mutualism
	Jandér K.C.; Steidinger B.S.
发表日期	2017
ISSN	1461-023X
EISSN	1461-0248
卷号	20 期号:7
英文摘要	Mutualisms between species are ecologically ubiquitous but evolutionarily puzzling. Host discrimination mechanisms that reduce the fitness of uncooperative symbionts can stabilise mutualism against collapse, but also present a paradox – if discrimination is effective, why do uncooperative symbionts persist? Here, we test whether mutations or fitness benefits of cheating best explain the prevalence of uncooperative wasps in the fig tree–fig wasp mutualism. By combining theory with field-collected data we demonstrate that the proportions of pollen-free wasps of strongly discriminating hosts are reached with reasonable mutation rates. In contrast, in weakly discriminating hosts, the required mutation rates, assuming a single locus, are untenably high, but the required cheater advantages fall within expected ranges. We propose that when discrimination is weak, uncooperative symbionts proliferate until they reach the equilibrium proportion that balances costs and benefits of cheating. Our results suggest that mechanisms that resolve the paradox of uncooperative symbionts differ among host species. © 2017 John Wiley & Sons Ltd/CNRS
英文关键词	Conflict; cooperation; host sanctions; mutualism; partner choice
学科领域	Agaonidae; animal; Ficus; mutation; symbiosis; tree; wasp; Animals; Ficus; Mutation; Symbiosis; Trees; Wasps
语种	英语
scopus关键词	Agaonidae; animal; Ficus; mutation; symbiosis; tree; wasp; Animals; Ficus; Mutation; Symbiosis; Trees; Wasps
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118367
作者单位	Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, United States; Smithsonian Tropical Research Institute, Unit 9100 Box 0948, DPOAA 34002-9998, United States; Department of Biology, Stanford University, Stanford, CA, United States
推荐引用方式 GB/T 7714	Jandér K.C.,Steidinger B.S.. Why mutualist partners vary in quality: mutation–selection balance and incentives to cheat in the fig tree–fig wasp mutualism[J],2017,20(7).
APA	Jandér K.C.,&Steidinger B.S..(2017).Why mutualist partners vary in quality: mutation–selection balance and incentives to cheat in the fig tree–fig wasp mutualism.Ecology Letters,20(7).
MLA	Jandér K.C.,et al."Why mutualist partners vary in quality: mutation–selection balance and incentives to cheat in the fig tree–fig wasp mutualism".Ecology Letters 20.7(2017).