气候变化领域集成服务门户(CCPortal): Impaired viral infection and reduced mortality of diatoms in iron-limited oceanic regions

CCPortal

DOI	10.1038/s41561-021-00711-6
	Impaired viral infection and reduced mortality of diatoms in iron-limited oceanic regions
	Kranzler C.F.; Brzezinski M.A.; Cohen N.R.; Lampe R.H.; Maniscalco M.; Till C.P.; Mack J.; Latham J.R.; Bruland K.W.; Twining B.S.; Marchetti A.; Thamatrakoln K.
发表日期	2021
ISSN	17520894
起始页码	231
结束页码	237
卷号	14 期号:4
英文摘要	Diatom primary productivity is tightly coupled with carbon export through the ballasted nature of the silica-based cell wall, linking the oceanic silicon and carbon cycles. However, despite low productivity, iron (Fe)-limited regimes are considered ‘hot spots’ of diatom silica burial with enhanced carbon export efficiency, raising questions about the mechanisms driving the biogeochemistry of these regions. Marine viruses are classically recognized as catalysts of remineralization through host lysis, short-circuiting the trophic transfer of carbon and facilitating the retention of dissolved organic matter and associated elements in the surface ocean. Here we used metatranscriptomic analysis of diatoms and associated viruses, along with a suite of physiological and geochemical metrics, to study the interaction between diatoms and viruses in Fe-limited regimes of the northeast Pacific. We found low cell-associated diatom virus diversity and abundance in a chronically Fe-limited region of the subarctic northeast Pacific. In a coastal upwelling region of the California Current, transient iron limitation also substantially reduced viral replication. These observations were recapitulated in Fe-limited cultures of the bloom-forming, centric diatom, Chaetoceros tenuissimus, which exhibited delayed virus-mediated mortality in addition to reduced viral replication. We suggest Fe-limited diatoms escape viral lysis and subsequent remineralization in the surface ocean, providing an additional mechanism contributing to enhanced carbon export efficiency and silica burial in Fe-limited oceanic regimes. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	abundance; biogeochemistry; diatom; dissolved organic matter; infectious disease; mortality; remineralization; California Current; oceanic regions; Pacific Ocean; Pacific Ocean (Northeast); Bacillariophyta; Chaetoceros
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206920
作者单位	Department of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ, United States; Marine Science Institute and the Department of Ecology Evolution and Marine Biology, University of California, Santa Barbara, CA, United States; Department of Marine Sciences, University of North Carolina, Chapel Hill, NC, United States; Marine Chemistry & Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Integrative Oceanography Division, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; Department of Ocean Sciences, University of California, Santa Cruz, CA, United States; Chemistry Department, Humboldt State University, Arcata, CA, United States; Bigelow Laboratory for Ocean Sciences, East Boothbay, Maine, ME, United States
推荐引用方式 GB/T 7714	Kranzler C.F.,Brzezinski M.A.,Cohen N.R.,et al. Impaired viral infection and reduced mortality of diatoms in iron-limited oceanic regions[J],2021,14(4).
APA	Kranzler C.F..,Brzezinski M.A..,Cohen N.R..,Lampe R.H..,Maniscalco M..,...&Thamatrakoln K..(2021).Impaired viral infection and reduced mortality of diatoms in iron-limited oceanic regions.Nature Geoscience,14(4).
MLA	Kranzler C.F.,et al."Impaired viral infection and reduced mortality of diatoms in iron-limited oceanic regions".Nature Geoscience 14.4(2021).