globalchange  > 气候变化与战略
DOI: 10.1111/ele.13630
论文题名:
Making sense of virus size and the tradeoffs shaping viral fitness
作者: Edwards K.F.; Steward G.F.; Schvarcz C.R.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2021
卷: 24, 期:2
起始页码: 363
结束页码: 373
语种: 英语
中文关键词: Allometric scaling ; bacteria ; burst size ; competition ; decay rate ; diffusivity ; giant virus ; host range ; phage ; phytoplankton
英文关键词: cell ; concentration (composition) ; fitness ; genome ; host range ; quantitative analysis ; trade-off ; virus ; Bacteria (microorganisms) ; cellular organisms ; DNA virus ; aquatic species ; bacterium ; ecosystem ; genetics ; virus ; Aquatic Organisms ; Bacteria ; DNA Viruses ; Ecosystem ; Viruses
英文摘要: Viruses span an impressive size range, with genome length varying a thousandfold and virion volume nearly a millionfold. For cellular organisms the scaling of traits with size is a pervasive influence on ecological processes, but whether size plays a central role in viral ecology is unknown. Here, we focus on viruses of aquatic unicellular organisms, which exhibit the greatest known range of virus size. We outline hypotheses within a quantitative framework, and analyse data where available, to consider how size affects the primary components of viral fitness. We argue that larger viruses have fewer offspring per infection and slower contact rates with host cells, but a larger genome tends to increase infection efficiency, broaden host range, and potentially increase attachment success and decrease decay rate. These countervailing selective pressures may explain why a breadth of sizes exist and even coexist when infecting the same host populations. Oligotrophic ecosystems may be enriched in “giant” viruses, because environments with resource-limited phagotrophs at low concentrations may select for broader host range, better control of host metabolism, lower decay rate and a physical size that mimics bacterial prey. Finally, we describe where further research is needed to understand the ecology and evolution of viral size diversity. © 2020 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166824
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作者单位: Department of Oceanography, University of Hawaiʻi at Mānoa, Honolulu, HI, United States

Recommended Citation:
Edwards K.F.,Steward G.F.,Schvarcz C.R.. Making sense of virus size and the tradeoffs shaping viral fitness[J]. Ecology Letters,2021-01-01,24(2)
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