Microbial evolutionary strategies in a dynamic ocean
Microbial evolutionary strategies in a dynamic ocean
复制标题
动态海洋中的微生物进化策略
DOI:
10.1073/pnas.1919332117
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Levine, Naomi M.
中科院分区:
文献类型:
--
作者:
Walworth, Nathan G.;Zakem, Emily J.;Dunne, John P.;Collins, Sinéad;Levine, Naomi M.
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.
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影响因子:
6.8
作者:
B. Ward;Sinéad Collins;S. Dutkiewicz;Samantha Gibbs;Paul Bown;A. Ridgwell;B. Sauterey;Jamie D. Wilson;A. Oschlies
通讯作者:
B. Ward;Sinéad Collins;S. Dutkiewicz;Samantha Gibbs;Paul Bown;A. Ridgwell;B. Sauterey;Jamie D. Wilson;A. Oschlies
影响因子:
3.7
作者:
K. Denman
通讯作者:
K. Denman
影响因子:
16.6
作者:
Jönsson BF;Watson JR
通讯作者:
Watson JR
DOI:
10.1016/b978-0-12-805388-1.00028-6
发表时间:
2017-01-01
期刊:
HANDBOOK OF EPIGENETICS: THE NEW MOLECULAR AND MEDICAL GENETICS, 2ND EDITION
影响因子:
--
作者:
Kronholm, Ilkka
通讯作者:
Kronholm, Ilkka
DOI:
10.1073/pnas.1505406112
发表时间:
2015-09-08
影响因子:
11.1
作者:
Cvijovic, Ivana;Good, Benjamin H.;Desai, Michael M.
通讯作者:
Desai, Michael M.