气候变化领域集成服务门户(CCPortal): Microbial population dynamics and evolutionary outcomes under extreme energy limitation

CCPortal

DOI	10.1073/pnas.2101691118
	Microbial population dynamics and evolutionary outcomes under extreme energy limitation
	Shoemaker W.R.; Jones S.E.; Muscarella M.E.; Behringer M.G.; Lehmkuhl B.K.; Lennon J.T.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:33
英文摘要	Microorganisms commonly inhabit energy-limited ecosystems where cellular maintenance and reproduction is highly constrained. To gain insight into how individuals persist under such conditions, we derived demographic parameters from a collection of 21 heterotrophic bacterial taxa by censusing 100 populations in an effectively closed system for 1,000 d. All but one taxon survived prolonged resource scarcity, yielding estimated times to extinction ranging over four orders of magnitude from 100 to 105 y. Our findings corroborate reports of long-lived bacteria recovered from ancient environmental samples, while providing insight into mechanisms of persistence. As death rates declined over time, lifespan was extended through the scavenging of dead cells. Although reproduction was suppressed in the absence of exogenous resources, populations continued to evolve. Hundreds of mutations were acquired, contributing to genome-wide signatures of purifying selection as well as molecular signals of adaptation. Consistent ecological and evolutionary dynamics indicate that distantly related bacteria respond to energy limitation in a similar and predictable manner, which likely contributes to the stability and robustness of microbial life. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Life history; Longevity; Microbial ecology; Molecular evolution; Necromass
语种	英语
scopus关键词	adult; article; controlled study; demography; ecology; ecosystem; human; life history; lifespan; longevity; microbial population dynamics; microorganism; molecular evolution; mortality rate; nonhuman; ordo; purifying selection; reproduction; taxon
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238430
作者单位	Department of Biology, Indiana University, Bloomington, IN 47405, United States; Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA 90095, United States; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, United States; Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK 99775, United States; Department of Biology and Wildlife, University of Alaska Fairbanks, Fairbanks, AK 99775, United States; Department of Biological Sciences, Vanderbilt University, Nashville, TN 37232, United States
推荐引用方式 GB/T 7714	Shoemaker W.R.,Jones S.E.,Muscarella M.E.,et al. Microbial population dynamics and evolutionary outcomes under extreme energy limitation[J],2021,118(33).
APA	Shoemaker W.R.,Jones S.E.,Muscarella M.E.,Behringer M.G.,Lehmkuhl B.K.,&Lennon J.T..(2021).Microbial population dynamics and evolutionary outcomes under extreme energy limitation.Proceedings of the National Academy of Sciences of the United States of America,118(33).
MLA	Shoemaker W.R.,et al."Microbial population dynamics and evolutionary outcomes under extreme energy limitation".Proceedings of the National Academy of Sciences of the United States of America 118.33(2021).