DOI: 10.1002/gbc.20061
Scopus记录号: 2-s2.0-84881501021
论文题名: Regional variation in the particulate organic carbon to nitrogen ratio in the surface ocean
作者: Martiny A ; C ; , Vrugt J ; A ; , Primeau F ; W ; , Lomas M ; W
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 3 起始页码: 723
结束页码: 731
语种: 英语
英文关键词: elemental stoichiometry
; nitrogen cycle
; Redfield
Scopus关键词: Environmental conditions
; Marine biogeochemistries
; Nitrogen cycles
; Ocean biogeochemistry
; Particulate materials
; Particulate organic carbon
; Redfield
; Systematic variation
; Biogeochemistry
; Neural networks
; Nitrogen
; Nutrients
; Plankton
; Oceanography
; artificial neural network
; biogeochemistry
; carbon
; community structure
; dominance
; environmental conditions
; eukaryote
; gyre
; nitrogen cycle
; oligotrophic environment
; particulate organic matter
; phosphorus
; picoplankton
; population structure
; Redfield ratio
; stochasticity
; surface area
; Prochlorococcus
; Synechococcus
英文摘要: The concept of constant elemental ratios in plankton communities - the Redfield ratio - is of central importance to ocean biogeochemistry. Recently, several studies have demonstrated regional differences in the plankton C:P and N:P ratio. However, less is known about potential systematic variations in the C:N ratio. Here we present an analysis of the particulate organic carbon to nitrogen ratio of 40,482 globally distributed samples from the upper 200 m of the ocean water column. Particulate organic carbon and nitrogen concentrations are highly correlated (R2 = 0.86) with a median value of 6.5. Using an artificial neural network analysis, we find regional variations in the C:N ratio linked to differences in environmental conditions. The ratio is lower in upper latitude cold water as well as upwelling regions in comparison to the warm oligotrophic gyres. We find substantial differences between ocean gyres that might be associated with differences in the nutrient supply ratio. Using cell sorting, we also quantified the C:N ratio of Prochlorococcus, Synechococcus, and picoeukaryotic field populations. The analysis demonstrates that picophytoplankton lineages exhibit a significantly higher ratio than the bulk particulate material but are only marginally significantly different from each other. Thus, the dominance of picophytoplankton in ocean gyres may contribute to the elevated ratios observed in these regions. Overall, the median C:N ratio derived from 40,482 samples is close to the canonical Redfield ratio, but significant regional deviations from this value are observed. These differences could be important for marine biogeochemistry and the regional coupling between the ocean's carbon and nitrogen cycles. Key PointsThe median upper ocean particulate C:N ratio is broadly constrained at 6.5The C:N ratio is 7.1 in low compared to 6.2 in high nutrient regionsThe C:N ratios in picophytoplankton are greater than global mean ©2013. 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/77589
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth System Science, University of California, 3208 Croul Hall, Irvine, CA 92697, United States; Department of Ecology and Evolutionary Biology, University of California, Irvine, CA, United States; Department of Civil and Environmental Engineering, University of California, Irvine, CA, United States; Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, United States
Recommended Citation:
Martiny A,C,, Vrugt J,et al. Regional variation in the particulate organic carbon to nitrogen ratio in the surface ocean[J]. Global Biogeochemical Cycles,2013-01-01,27(3)