Seasonal variation in marine C:N:P stoichiometry: can the composition of seston explain stable Redfield ratios?

Frigstad, Helene; Andersen, Tom; Hessen, Dag O.; Naustvoll, Lars Johan; Johnsen, Torbjørn Martin; Bellerby, R. G. J.

doi:10.5194/bg-8-2917-2011

Cited by 56 publications

(46 citation statements)

References 55 publications

(68 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We noticed that slopes of DIC to PO 3− 4 differed substantially between these two cruises, and this may due to differences in relative rates of remineralization and uptake during the two cruises (for example, as was recently reported in the Norwegian shelf, Frigstad et al, 2011). Given the potential contributions of other PO 3− 4 sources in addition to those sources that were also likely DIC sources, it is acknowledged that using riverine phosphate input to estimate the carbon uptake in the plume area may result in a bias.…”

Section: Stoichiometrymentioning

confidence: 77%

“…by subtracting concentrations estimated for conservative mixing alone) reflect the net effect of autotrophy plus heterotrophy. The concept of varying source terms that differ in stoichiometry was reported by Frigstad et al (2011), who found that the average C / N ratio of suspended particulate organic material (POM) in the Norwegian shelf was the combined result of that due to autotrophs and heterotrophs (the former being higher than Redfield). Differences in uptake by various biological communities may explain observed temporal and spatial differences in stoichiometry (Pahlow and Riebesell, 2000;Li et al, 2000;Li and Peng, 2002).…”

Section: Stoichiometrymentioning

confidence: 99%

“…Redfield (1958) first proposed a biological control for a fixed C / N / P stoichiometry of marine plankton, and subsequently inorganic and organic stoichiometry has been examined in freshwater (Hecky et al, 1993), marginal seas (Frigstad et al, 2011;Hupe and Karstensen, 2000), and the open ocean (Anderson and Samiento, 1994;Hopkinson and Vallino, 2005;Li et al, 2000;Li and Peng, 2002). These studies have led to an improved understanding of the relationships between nutrient availability and biogeochemical processes such as photosynthesis and remineralization in all aquatic systems.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The stoichiometry of inorganic carbon and nutrient removal in the Mississippi River plume and adjacent continental shelf

et al. 2012

View full text Add to dashboard Cite

Abstract. The stoichiometry of dissolved inorganic carbon (DIC) and nutrients during biological uptake is widely assumed to follow the Redfield ratios (especially the C / N ratio) in large river plume ecosystems. However, this assumption has not been systematically examined and documented, because DIC and nutrients are rarely studied simultaneously in river plume areas and interpretation of ratios can be confounded by strong river-ocean mixing as well as intense biological activity. We examined stoichiometric ratios of DIC and nutrients (NO and calculated biological removal as the difference between observed concentrations and those predicted from conservative mixing, as determined from a multi-endmember mixing model and observed salinity and total alkalinity. Despite complex physical and biogeochemical influences, relationships between DIC and nutrients were strongly dependent on salinity range and geographic location, and influenced by biological removal. Lower C / Si and N / Si ratios in one nearshore area were likely due to localized input of high Si and low NO − 3 water from adjacent wetlands or preferential removal of nitrogen in the area. When net biological uptake was separated from river-ocean mixing and corrected for preferential N removal, the stoichiometric ratio of C / N / Si was similar to the Redfield ratio, thus supporting the applicability of the Redfield-type C / N / Si ratios in river-plume biogeochemical models.

show abstract

Section: Stoichiometrymentioning

confidence: 77%

Section: Stoichiometrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The stoichiometry of inorganic carbon and nutrient removal in the Mississippi River plume and adjacent continental shelf

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Furthermore, C : N ratios have been observed to differ both between seasons (e.g. Körtzinger et al, 2001;Frigstad et al, 2011) and between regions (e.g. Koeve, 2006;Tamelander et al, 2013;Frigstad et al, 2014), with values as high as ∼ 15.…”

Section: E Jeansson Et Al: Fluxes Of Carbon and Nutrients To The Icmentioning

confidence: 99%

“…Nonetheless, different mechanisms seem to affect the flux of carbon and nitrogen during the season, as shown for different regions (e.g. Banse, 1994;Kähler and Koeve, 2001;Frigstad et al, 2011).…”

Section: Variable Stoichiometrymentioning

confidence: 99%

Fluxes of carbon and nutrients to the Iceland Sea surface layer and inferred primary productivity and stoichiometry

et al. 2015

Self Cite

View full text Add to dashboard Cite

Abstract. This study evaluates long-term mean fluxes of carbon and nutrients to the upper 100 m of the Iceland Sea. The study utilises hydro-chemical data from the Iceland Sea time series station (68.00 • N, 12.67 • W), for the years between 1993 and 2006. By comparing data of dissolved inorganic carbon (DIC) and nutrients in the surface layer (upper 100 m), and a sub-surface layer (100-200 m), we calculate monthly deficits in the surface, and use these to deduce the long-term mean surface layer fluxes that affect the deficits: vertical mixing, horizontal advection, air-sea exchange, and biological activity. The deficits show a clear seasonality with a minimum in winter, when the mixed layer is at the deepest, and a maximum in early autumn, when biological uptake has removed much of the nutrients. The annual vertical fluxes of DIC and nitrate amounts to 2.9 ± 0.5 and 0.45 ± 0.09 mol m −2 yr −1 , respectively, and the annual airsea uptake of atmospheric CO 2 is 4.4 ± 1.1 mol C m −2 yr −1 . The biologically driven changes in DIC during the year relates to net community production (NCP), and the net annual NCP corresponds to export production, and is here calculated as 7.3 ± 1.0 mol C m −2 yr −1 . The typical, median C : N ratio during the period of net community uptake is 9.0, and clearly higher than the Redfield ratio, but is varying during the season.

show abstract

Seasonal and long‐term changes in elemental concentrations and ratios of marine particulate organic matter

Talarmin

Lomas

Bozec

et al. 2016

Global Biogeochemical Cycles

View full text Add to dashboard Cite

What is the temporal variability of the elemental stoichiometry of marine microbial communities across ocean regions? To answer this question, we present an analysis of environmental conditions, particulate organic carbon, nitrogen, and phosphorus concentrations and their ratios across 20 time series (3–25 years duration) representing estuarine, coastal, and open ocean environments. The majority of stations showed significant seasonal oscillations in particulate organic elemental concentrations and ratios. However, shorter‐term changes contributed most to overall variance in particulate organic matter concentrations and ratios. We found a correlation between the seasonal oscillations of environmental conditions and elemental ratios at many coastal but not open ocean and estuarine stations. C:N peaked near the seasonal temperature minimum and nutrient maximum, but some stations showed other seasonal links. C:N ratios declined with time over the respective observation periods at all open ocean and estuarine stations as well as at five coastal station but increased at the nine other coastal stations. C:P (but not N:P) declined slightly at Bermuda Atlantic Time‐series Study but showed large significant increases at Hawaii Ocean Time‐series and Arendal stations. The relationships between long‐term changes in environmental conditions and particulate organic matter concentrations or ratios were ambiguous, but interactions between changes in temperature and nutrient availability were important. Overall, our analysis demonstrates significant changes in elemental ratios at long‐term and seasonal time scales across regions, but the underlying mechanisms are currently unclear. Thus, we need to better understand the detailed mechanisms driving the elemental composition of marine microbial ecosystems in order to predict how oceans will respond to environmental changes.

show abstract

Seasonal variation in marine C:N:P stoichiometry: can the composition of seston explain stable Redfield ratios?

Cited by 56 publications

References 55 publications

The stoichiometry of inorganic carbon and nutrient removal in the Mississippi River plume and adjacent continental shelf

The stoichiometry of inorganic carbon and nutrient removal in the Mississippi River plume and adjacent continental shelf

Fluxes of carbon and nutrients to the Iceland Sea surface layer and inferred primary productivity and stoichiometry

Seasonal and long‐term changes in elemental concentrations and ratios of marine particulate organic matter

Contact Info

Product

Resources

About