DOI: 10.1111/ele.12792
Scopus记录号: 2-s2.0-85020446262
论文题名: Why mutualist partners vary in quality: mutation–selection balance and incentives to cheat in the fig tree–fig wasp mutualism
作者: Jandér K.C. ; Steidinger B.S.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2017
卷: 20, 期: 7 起始页码: 922
结束页码: 932
语种: 英语
英文关键词: Conflict
; cooperation
; host sanctions
; mutualism
; partner choice
Scopus关键词: Agaonidae
; animal
; Ficus
; mutation
; symbiosis
; tree
; wasp
; Animals
; Ficus
; Mutation
; Symbiosis
; Trees
; Wasps
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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107608
Appears in Collections: 气候减缓与适应
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作者单位: Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, United States; Smithsonian Tropical Research Institute, Unit 9100 Box 0948, DPO, United States; Department of Biology, Stanford University, Stanford, CA, United States
Recommended Citation:
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]. Ecology Letters,2017-01-01,20(7)