DOI: 10.1073/pnas.1919332117
论文题名: Microbial evolutionary strategies in a dynamic ocean
作者: Walworth N.G. ; Zakem E.J. ; Dunne J.P. ; Collins S. ; Levine N.M.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期: 11 起始页码: 5943
结束页码: 5948
语种: 英语
英文关键词: Adaptation timescales
; Advection
; Evolution
; Fluctuating environment
; Marine microbes
Scopus关键词: Article
; biogeochemistry
; cell division
; climate
; environmental change
; evolutionary adaptation
; marine environment
; microbial diversity
; microbial population dynamics
; nonhuman
; ocean environment
; pressure
; priority journal
; adaptation
; computer simulation
; environment
; evolution
; genetic susceptibility
; genetic variation
; marine biology
; microbiology
; sea
; sea water
; Adaptation, Biological
; Anticipation, Genetic
; Biological Evolution
; Climate
; Computer Simulation
; Environment
; Genetic Variation
; Marine Biology
; Oceans and Seas
; Seawater
英文摘要: Marine microbes form the base of ocean food webs and drive ocean biogeochemical cycling. Yet little is known about the ability of microbial populations to adapt as they are advected through changing conditions. Here, we investigated the interplay between physical and biological timescales using a model of adaptation and an eddy-resolving ocean circulation climate model. Two criteria were identified that relate the timing and nature of adaptation to the ratio of physical to biological timescales. Genetic adaptation was impeded in highly variable regimes by nongenetic modifications but was promoted in more stable environments. An evolutionary trade-off emerged where greater short-term nongenetic transgenerational effects (low-γ strategy) enabled rapid responses to environmental fluctuations but delayed genetic adaptation, while fewer short-term transgenerational effects (high-γ strategy) allowed faster genetic adaptation but inhibited short-term responses. Our results demonstrate that the selective pressures for organisms within a single water mass vary based on differences in generation timescales resulting in different evolutionary strategies being favored. Organisms that experience more variable environments should favor a low-γ strategy. Furthermore, faster cell division rates should be a key factor in genetic adaptation in a changing ocean. Understanding and quantifying the relationship between evolutionary and physical timescales is critical for robust predictions of future microbial dynamics. © 2020 National Academy of Sciences. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164283
Appears in Collections: 气候变化与战略
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作者单位: Walworth, N.G., Department of Biological Sciences, University of Southern California, Los Angeles, CA 91011, United States; Zakem, E.J., Department of Biological Sciences, University of Southern California, Los Angeles, CA 91011, United States; Dunne, J.P., Geophysical Fluid Dynamics Laboratory, National Oceanic and Atmospheric Administration, Princeton, NJ 08540, United States; Collins, S., Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, EH9 3FL, United Kingdom; Levine, N.M., Department of Biological Sciences, University of Southern California, Los Angeles, CA 91011, United States
Recommended Citation:
Walworth N.G.,Zakem E.J.,Dunne J.P.,et al. Microbial evolutionary strategies in a dynamic ocean[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(11)