globalchange  > 气候变化与战略
DOI: 10.1038/s41396-019-0506-9
论文题名:
Marked changes in diversity and relative activity of picoeukaryotes with depth in the world ocean
作者: Giner C.R.; Pernice M.C.; Balagué V.; Duarte C.M.; Gasol J.M.; Logares R.; Massana R.
刊名: ISME Journal
ISSN: 17517362
出版年: 2020
卷: 14, 期:2
语种: 英语
Scopus关键词: community composition ; community structure ; eukaryote ; global ocean ; mesopelagic zone ; picoplankton ; species diversity ; tropical environment ; Bicosoecida ; Chrysophyceae ; Dinophyceae ; Eukaryota ; Otus
英文摘要: Microbial eukaryotes are key components of the ocean plankton. Yet, our understanding of their community composition and activity in different water layers of the ocean is limited, particularly for picoeukaryotes (0.2–3 µm cell size). Here, we examined the picoeukaryotic communities inhabiting different vertical zones of the tropical and subtropical global ocean: surface, deep chlorophyll maximum, mesopelagic (including the deep scattering layer and oxygen minimum zones), and bathypelagic. Communities were analysed by high-tthroughput sequencing of the 18S rRNA gene (V4 region) as represented by DNA (community structure) and RNA (metabolism), followed by delineation of Operational Taxonomic Units (OTUs) at 99% similarity. We found a stratification of the picoeukaryotic communities along the water column, with assemblages corresponding to the sunlit and dark ocean. Specific taxonomic groups either increased (e.g., Chrysophyceae or Bicosoecida) or decreased (e.g., Dinoflagellata or MAST-3) in abundance with depth. We used the rRNA:rDNA ratio of each OTU as a proxy of metabolic activity. The highest relative activity was found in the mesopelagic layer for most taxonomic groups, and the lowest in the bathypelagic. Altogether, we characterize the change in community structure and metabolic activity of picoeukaryotes with depth in the global ocean, suggesting a hotspot of activity in the mesopelagic. © 2019, The Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159521
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作者单位: Institut de Ciències del Mar (CSIC), Passeig Marítim de la Barceloneta, 37-49, Barcelona, Catalonia ES-08003, Spain; Institute for the Oceans and Fisheries, University of British Columbia, AERL, 2202 Main Mall, Vancouver, BC V6T 1Z4, Canada; Red Sea Research Center (RSRC) and Computational Biosciences Research Center (CBRC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia; Centre for Marine Ecosystem Research, School of Science, Edith Cowan University, Joondalup, WA, Australia

Recommended Citation:
Giner C.R.,Pernice M.C.,Balagué V.,et al. Marked changes in diversity and relative activity of picoeukaryotes with depth in the world ocean[J]. ISME Journal,2020-01-01,14(2)
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