DOI: 10.1038/ngeo2303
论文题名: Global-scale variations of the ratios of carbon to phosphorus in exported marine organic matter
作者: Teng Y.-C. ; Primeau F.W. ; Moore J.K. ; Lomas M.W. ; Martiny A.C.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期: 12 起始页码: 895
结束页码: 898
语种: 英语
Scopus关键词: biological production
; biomass
; carbon cycle
; global change
; marine ecosystem
; phosphorus cycle
; phytoplankton
; stoichiometry
英文摘要: The ratio of carbon (C) to phosphorus (P) in marine phytoplankton is thought to be constant throughout the worlds'oceans. Known as the Redfield ratio, this relationship describes the links between carbon and phosphorus cycling and marine ecosystems. However, variations in the stoichiometry of phytoplankton have recently been identified, in particular strong latitudinal variability. Here we assess the impact of this variability in the C:P ratio of biomass on the C:P ratio of organic matter that is exported to the deep ocean using a biogeochemical inverse-model based on a data-constrained ocean circulation model and a global database of dissolved inorganic carbon and phosphate measurements. We identify global patterns of variability in the C:P ratios of exported organic matter, with higher values in the nutrient-depleted subtropical gyres, where organic matter export is relatively low, and lower ratios in nutrient-rich upwelling zones and high-latitude regions, where organic matter export is high. This suggests that total carbon export is relatively constant throughout the oceans, in agreement with recent estimates of carbon fluxes. We conclude that the latitudinal patterns of C:P in exported organic matter are consistent with the large-scale stoichiometric variations in phytoplankton C:P. We suggest that a future expansion of nutrient-depleted waters could result in a shift to more efficient C export that compensates for the expected decline in productivity. © 2014 Macmillan Publishers Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106472
Appears in Collections: 气候减缓与适应 科学计划与规划
There are no files associated with this item.
作者单位: Department of Earth System Science, University of California, Irvine, CA, United States; Bigelow Laboratory for Ocean Sciences, East BoothbayME, United States; Department of Ecology and Evolutionary Biology, University of California, Irvine, CA, United States
Recommended Citation:
Teng Y.-C.,Primeau F.W.,Moore J.K.,et al. Global-scale variations of the ratios of carbon to phosphorus in exported marine organic matter[J]. Nature Geoscience,2014-01-01,7(12)