DOI: 10.1002/2013GB004668
Scopus记录号: 2-s2.0-84903863060
论文题名: Global patterns of phytoplankton nutrient and light colimitation inferred from an optimality-based model
作者: Arteaga L ; , Pahlow M ; , Oschlies A
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 7 起始页码: 648
结束页码: 661
语种: 英语
英文关键词: colimitation
; growth
; light
; nutrient
; phytoplankton
Scopus关键词: Growth (materials)
; Light
; Oceanography
; Phytoplankton
; Stoichiometry
; Biological production
; Co-limitation
; Eastern equatorial Pacific
; Environmental conditions
; Inorganic nutrients
; Light limitations
; Northern Hemispheres
; Phytoplankton growth
; Nutrients
; biological production
; data set
; environmental conditions
; global ocean
; growth rate
; light availability
; Northern Hemisphere
; optimization
; phytoplankton
; Redfield ratio
; remote sensing
; Pacific Ocean
; Pacific Ocean (Equatorial)
; Southern Ocean
英文摘要: The widely used concept of constant "Redfield" phytoplankton stoichiometry is often applied for estimating which nutrient limits phytoplankton growth in the surface ocean. Culture experiments, in contrast, show strong relations between growth conditions and cellular stoichiometry with often substantial deviations from Redfield stoichiometry. Here we investigate to what extent both views agree by analyzing remote sensing and in situ data with an optimality-based model of nondiazotrophic phytoplankton growth in order to infer seasonally varying patterns of colimitation by light, nitrogen (N), and phosphorus (P) in the global ocean. Our combined model-data analysis suggests strong N and N-P colimitation in the tropical ocean, seasonal light, and N-P colimitation in the Northern Hemisphere, and strong light limitation only during winter in the Southern Ocean. The eastern equatorial Pacific appears as the only ocean area that is essentially not limited by N, P, or light. Even though our optimality-based approach specifically accounts for flexible stoichiometry, inferred patterns of N and P limitation are to some extent consistent with those obtained from an analysis of surface inorganic nutrients with respect to the Redfield N:P ratio. Iron is not part of our analysis, implying that we cannot accurately predict N cell quotas in high-nutrient, low-chlorophyll regions. Elsewhere, we do not expect a major effect of iron on the relative distribution of N, P, and light colimitation areas. The relative importance of N, P, and light in limiting phytoplankton growth diagnosed here by combining observations and an optimal growth model provides a useful constraint for models used to predict future marine biological production under changing environmental conditions. © 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/77470
Appears in Collections: 气候变化事实与影响
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作者单位: GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Recommended Citation:
Arteaga L,, Pahlow M,, Oschlies A. Global patterns of phytoplankton nutrient and light colimitation inferred from an optimality-based model[J]. Global Biogeochemical Cycles,2014-01-01,28(7)