Influence of nutrients on carbon isotope fractionation by natural populations of Prymnesiophyte algae in NE Pacific

Eek, Magnus K; Whiticar, Michael J.; Bishop, James K. B.; Wong, C. S.

doi:10.1016/s0967-0645(99)00086-7

Cited by 37 publications

(27 citation statements)

References 31 publications

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“…The results of Bidigare et al (1997) and other efforts (e.g., Eek et al, 1999;Laws et al, 2001;Popp et al, 1999) allow a calibration of the variable 'b' in terms of [PO 4 3À ] ( Table 1). ] regression (Table 1).…”

Section: The Calibration Of 'B' and Estimates Of E Fmentioning

confidence: 99%

“…Form I, the most abundant variant, is found in Eukarya and Bacteria (Tabita et al, 2008). Data from Bidigare et al (1997), Popp et al (1999), Eek et al (1999), and Laws et al (2001). Multiple forms of Rubisco likely evolved in response to environmental stresses related to changes in atmospheric [CO 2 ] and [O 2 ] throughout Earth history (Badger and Bek, 2008;Young et al, 2012), and subsequently express a broad range of isotope discrimination related to the form's ] regression is altered (see Table 1).…”

Section: The Calibration Of 'B' and Estimates Of E Fmentioning

confidence: 99%

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Biomarker-Based Inferences of Past Climate: The Alkenone pCO2 Proxy

Pagani

2014

Treatise on Geochemistry

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Section: The Calibration Of 'B' and Estimates Of E Fmentioning

confidence: 99%

Section: The Calibration Of 'B' and Estimates Of E Fmentioning

confidence: 99%

Biomarker-Based Inferences of Past Climate: The Alkenone pCO2 Proxy

Pagani

2014

Treatise on Geochemistry

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“…Phytoplankton are one of the major sources of organic matter in aquatic systems and will usually comprise the isotopic signals of a variety of different phototrophic species. Environmental conditions and species-related physiology are known to affect the stable C isotope composition of phytoplankton (Gu and Schelske 1996;Burkhardt et al 1999;Eek et al 1999). Moreover, the existence of an inverse relationship between the growth rate of algae and the extent of discrimination against 13 CO 2 in photosynthesis has been implied in a number of studies (Fry and Wainright 1991;Kopczyñska et al 1995;Laws et al 1995;Popp et al 1998).…”

Section: Acknowledgmentsmentioning

confidence: 99%

Using the hidden isotopic heterogeneity in phyto‐ and zooplankton to unmask disparity in trophic carbon transfer

Pel

Hoogveld

Floris

2003

Limnology & Oceanography

103

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In this study, we show that natural phototrophic populations can be probed individually for their in situ ␦ 13 C signature by linking fluorescence-activated cell sorting and isotope-ratio mass spectrometry (IRMS) using in-line pyrolytic methylation. This novel methodology greatly improved the resolution in discriminating and tracing the differential carbon (C) pathways at the base of the pelagic food web in the cyanobacteria-dominated Lake Loosdrecht (The Netherlands). Our analysis revealed the co-occurrence of phytoplankton taxa differing by 6-10‰ in ␦ 13 C. Predominant micro-and mesozooplankton species reflected this difference as the result of preferential grazing and/ or selective digestion. Flow cytometric (FCM) retrieval of phytoplankton ␦ 13C signatures, applied in conjunction with 13 C-carbonate labeling, also enabled an assessment of in situ population-specific growth rates. Diatoms and green algae exhibited up to ninefold higher growth rates than those for cyanobacterial species. The coexistence of phytoplankton populations widely differing in ␦ 13 C, standing stock, and turnover time has important implications for the interpretation of C transfer in pelagic food webs. Our approach disclosed a disproportional impact on trophic cascades by numerically minor phototrophs that otherwise would have gone unnoticed. Despite the abundance of cyanobacterial-derived C, the zooplankton largely rely on eukaryotic algae for growth. Rotifers take a central position in passing on this algal C to the cyclopoid copepod populations in the lake. The bosminid-dominated cladoceran population uses both the cyanobacterial-and algal-derived C in approximately equal shares.

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“…Reasonable values for ε f range between 25–27‰ [ Popp et al , 1998a; Goericke et al , 1994]. A variety of expressions for the physiology‐dependent term b can be constructed using the range of possible values for ε f in combination with the mathematical expressions for the geometric mean regression and 95% confidence limits from the global data set derived from all available data [ Bidigare et al , 1997, 1999; Popp et al , 1999; Eek et al , 1999; Laws et al , 2001]: is based on the upper 95% confidence interval of the b versus [PO 4 3− ] relationship for all available data and an ε f = 27‰. is based on the geometric mean regression of all available data using an ε f = 25‰.…”

Section: Approachmentioning

confidence: 99%

Comparison of water column [CO_2aq] with sedimentary alkenone‐based estimates: A test of the alkenone‐CO₂proxy

et al. 2002

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[1] The stable carbon isotopic compositions of alkenones have been used to interpret the long-term history of the partial pressure of atmospheric carbon dioxide ( pCO 2 ). Although extensive water column and culture studies document the potential utility and limitations of this approach, to date the accuracy of pCO 2 values derived from sedimentary alkenones remains untested. For this study we establish Holocene-aged, alkenonebased CO 2aq estimates ([CO 2aq ] alk ) from 20 sites along a central Pacific Ocean transect and compare them against both observed modern water column CO 2aq and estimated preindustrial concentrations at the depth of alkenone production at each site. Although the [CO 2aq ] alk track measured water column values, they are conspicuously lower than modern values across the subtropics. This offset likely reflects the contributions of anthropogenic CO 2 in modern surface waters relative to preindustrial concentrations at the time of alkenone production. When a model-based estimate of anthropogenic CO 2 is removed from the modern observed values, a majority (84%) of [CO 2aq ] alk falls within 20% of modeled preindustrial values. Consistency between the modeled and alkenone-based estimates of preindustrial CO 2 levels points to the relative accuracy of the alkenone-CO 2 method across a wide range of ocean and biogeographic regimes, provided that phosphate concentrations, at the depth of haptophyte production, are reasonably constrained. It further suggests that lightlimited growth and/or active carbon uptake, if they occur, have a negligible effect on reconstructed [CO 2aq ].

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Influence of nutrients on carbon isotope fractionation by natural populations of Prymnesiophyte algae in NE Pacific

Cited by 37 publications

References 31 publications

Biomarker-Based Inferences of Past Climate: The Alkenone pCO2 Proxy

Biomarker-Based Inferences of Past Climate: The Alkenone pCO2 Proxy

Using the hidden isotopic heterogeneity in phyto‐ and zooplankton to unmask disparity in trophic carbon transfer

Comparison of water column [CO_2aq] with sedimentary alkenone‐based estimates: A test of the alkenone‐CO₂proxy

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Influence of nutrients on carbon isotope fractionation by natural populations of Prymnesiophyte algae in NE Pacific

Cited by 37 publications

References 31 publications

Biomarker-Based Inferences of Past Climate: The Alkenone pCO2 Proxy

Biomarker-Based Inferences of Past Climate: The Alkenone pCO2 Proxy

Using the hidden isotopic heterogeneity in phyto‐ and zooplankton to unmask disparity in trophic carbon transfer

Comparison of water column [CO2aq] with sedimentary alkenone‐based estimates: A test of the alkenone‐CO2proxy

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Comparison of water column [CO_2aq] with sedimentary alkenone‐based estimates: A test of the alkenone‐CO₂proxy