DOI: 10.1002/2013GB004797
Scopus记录号: 2-s2.0-84905636403
论文题名: Long-term variability of phytoplankton carbon biomass in the Sargasso Sea
作者: Wallhead P ; J ; , Garçon V ; C ; , Casey J ; R ; , Lomas M ; W
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 8 起始页码: 825
结束页码: 841
语种: 英语
英文关键词: carbon biomass
; data reconstruction
; phytoplankton
; time series analysis
Scopus关键词: biological pump
; biomass
; eukaryote
; flow cytometry
; long-term change
; North Atlantic Oscillation
; nutrient availability
; phytoplankton
; seasonal variation
; time series analysis
; Atlantic Ocean
; Sargasso Sea
; Eukaryota
; Prokaryota
英文摘要: Time series of phytoplankton carbon biomass are scarce yet may provide important insights into ocean productivity and carbon export to depth via the oceanic biological pump. We combine recent flow-cytometric measurements with pigment concentrations and other standard measurements to reconstruct taxon-specific phytoplankton carbon biomass in the Sargasso Sea over 22 years, using a multiple regression approach. The reconstructed series reveal an increasing trend (∼3% per year) in total phytoplankton carbon, apparently driven by increasing nutrient supply by vertical mixing associated with a shift to a negative phase in the winter North Atlantic Oscillation index. Also, the reconstructed eukaryote biomass fraction shows a multiannual shift from ∼45% in the early 1990s/late 2000s to ∼70% in the late 1990s/early 2000s. We hypothesize that a multiannual shift in the seasonal pattern of mixing may have stimulated and restructured the eukaryote community while suppressing prokaryote populations by increasing photodamage and grazing mortality. ©2014. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77463
Appears in Collections: 气候变化事实与影响
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作者单位: Norwegian Institute for Water Research, Bergen, Norway; Laboratoire d'Etudes en Géophysique et Océanographie Spatiales, Toulouse, France; Center for Microbial Oceanography: Research and Education, School of Ocean and Earth Science and Technology, University of Hawai'i at Manoa, Honolulu, HI, United States; Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, United States
Recommended Citation:
Wallhead P,J,, Garçon V,et al. Long-term variability of phytoplankton carbon biomass in the Sargasso Sea[J]. Global Biogeochemical Cycles,2014-01-01,28(8)