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Productivity variation around the Crozet Plateau: A naturally iron fertilised area of the Southern Ocean

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Productivity variation around the Crozet Plateau : A naturally iron fertilised area of the Southern Ocean. / Hernandez-Sanchez, Maria T.; Venables, Hugh J.; Mills, Rachel A.; Wolff, George; Fisher, Elizabeth H.; Holtvoeth, Jens; Leng, Melanie J.; Pancost, Richard D.

In: Organic Geochemistry, Vol. 41, No. 8, 01.08.2010, p. 767-778.

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Harvard

Hernandez-Sanchez, MT, Venables, HJ, Mills, RA, Wolff, G, Fisher, EH, Holtvoeth, J, Leng, MJ & Pancost, RD 2010, 'Productivity variation around the Crozet Plateau: A naturally iron fertilised area of the Southern Ocean', Organic Geochemistry, vol. 41, no. 8, pp. 767-778. https://doi.org/10.1016/j.orggeochem.2010.05.014

APA

Hernandez-Sanchez, M. T., Venables, H. J., Mills, R. A., Wolff, G., Fisher, E. H., Holtvoeth, J., ... Pancost, R. D. (2010). Productivity variation around the Crozet Plateau: A naturally iron fertilised area of the Southern Ocean. Organic Geochemistry, 41(8), 767-778. https://doi.org/10.1016/j.orggeochem.2010.05.014

Vancouver

Hernandez-Sanchez MT, Venables HJ, Mills RA, Wolff G, Fisher EH, Holtvoeth J et al. Productivity variation around the Crozet Plateau: A naturally iron fertilised area of the Southern Ocean. Organic Geochemistry. 2010 Aug 1;41(8):767-778. https://doi.org/10.1016/j.orggeochem.2010.05.014

Author

Hernandez-Sanchez, Maria T. ; Venables, Hugh J. ; Mills, Rachel A. ; Wolff, George ; Fisher, Elizabeth H. ; Holtvoeth, Jens ; Leng, Melanie J. ; Pancost, Richard D. / Productivity variation around the Crozet Plateau : A naturally iron fertilised area of the Southern Ocean. In: Organic Geochemistry. 2010 ; Vol. 41, No. 8. pp. 767-778.

Bibtex

@article{ef74195b33a14209b5d05904b79a8562,
title = "Productivity variation around the Crozet Plateau: A naturally iron fertilised area of the Southern Ocean",
abstract = "The Crozet Plateau is an area of interest as it is a region of the Southern Ocean where annual primary productivity is relatively high. We describe spatial and temporal variations in the biomarker distributions and carbon and nitrogen isotopic signatures of organic matter formed within surface waters around the plateau during an algal bloom. In the centre of the bloom, diatom-derived sterols dominate, whereas alkenones are relatively more abundant outside and at the edge of the bloom. Bulk organic δ 13C and δ 15N values are enriched inside the bloom area, ranging from -18.7‰ to -17.6‰ and +1.6‰ to +3.7‰, respectively, compared to -25.7‰ to -20.9‰ and -2.0‰ to +1.3‰, respectively, outside the bloom area. Variation in bulk δ 15N values is attributed primarily to NH 3 or dissolved organic N uptake, with only a minor contribution from Rayleigh fractionation of the NO3- pool. Compound specific δ 13C values (cholest-5-en-3β-ol, cholesta-5,22-dien-3β-ol, 24-methylcholesta-5,22-dien-3β-ol, 24-methylcholesta-24(28)-dien-3β-ol and alkenones) are also enriched in the Fe fertilised region relative to other areas, presumably reflecting higher phytoplankton growth rate, consumption of dissolved inorganic carbon and perhaps more intense use of carbon concentrating mechanisms. The observations confirm previous interpretations that Fe fertilisation in the Crozet region has affected nutrient utilisation and the algal community structure; it also suggests that lipid biomarkers and their δ 13C values record a specific bloom signature that may be recorded in underlying sediments.",
author = "Hernandez-Sanchez, {Maria T.} and Venables, {Hugh J.} and Mills, {Rachel A.} and George Wolff and Fisher, {Elizabeth H.} and Jens Holtvoeth and Leng, {Melanie J.} and Pancost, {Richard D.}",
year = "2010",
month = "8",
day = "1",
doi = "10.1016/j.orggeochem.2010.05.014",
language = "English",
volume = "41",
pages = "767--778",
journal = "Organic Geochemistry",
issn = "0146-6380",
publisher = "Elsevier",
number = "8",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - Productivity variation around the Crozet Plateau

T2 - A naturally iron fertilised area of the Southern Ocean

AU - Hernandez-Sanchez, Maria T.

AU - Venables, Hugh J.

AU - Mills, Rachel A.

AU - Wolff, George

AU - Fisher, Elizabeth H.

AU - Holtvoeth, Jens

AU - Leng, Melanie J.

AU - Pancost, Richard D.

PY - 2010/8/1

Y1 - 2010/8/1

N2 - The Crozet Plateau is an area of interest as it is a region of the Southern Ocean where annual primary productivity is relatively high. We describe spatial and temporal variations in the biomarker distributions and carbon and nitrogen isotopic signatures of organic matter formed within surface waters around the plateau during an algal bloom. In the centre of the bloom, diatom-derived sterols dominate, whereas alkenones are relatively more abundant outside and at the edge of the bloom. Bulk organic δ 13C and δ 15N values are enriched inside the bloom area, ranging from -18.7‰ to -17.6‰ and +1.6‰ to +3.7‰, respectively, compared to -25.7‰ to -20.9‰ and -2.0‰ to +1.3‰, respectively, outside the bloom area. Variation in bulk δ 15N values is attributed primarily to NH 3 or dissolved organic N uptake, with only a minor contribution from Rayleigh fractionation of the NO3- pool. Compound specific δ 13C values (cholest-5-en-3β-ol, cholesta-5,22-dien-3β-ol, 24-methylcholesta-5,22-dien-3β-ol, 24-methylcholesta-24(28)-dien-3β-ol and alkenones) are also enriched in the Fe fertilised region relative to other areas, presumably reflecting higher phytoplankton growth rate, consumption of dissolved inorganic carbon and perhaps more intense use of carbon concentrating mechanisms. The observations confirm previous interpretations that Fe fertilisation in the Crozet region has affected nutrient utilisation and the algal community structure; it also suggests that lipid biomarkers and their δ 13C values record a specific bloom signature that may be recorded in underlying sediments.

AB - The Crozet Plateau is an area of interest as it is a region of the Southern Ocean where annual primary productivity is relatively high. We describe spatial and temporal variations in the biomarker distributions and carbon and nitrogen isotopic signatures of organic matter formed within surface waters around the plateau during an algal bloom. In the centre of the bloom, diatom-derived sterols dominate, whereas alkenones are relatively more abundant outside and at the edge of the bloom. Bulk organic δ 13C and δ 15N values are enriched inside the bloom area, ranging from -18.7‰ to -17.6‰ and +1.6‰ to +3.7‰, respectively, compared to -25.7‰ to -20.9‰ and -2.0‰ to +1.3‰, respectively, outside the bloom area. Variation in bulk δ 15N values is attributed primarily to NH 3 or dissolved organic N uptake, with only a minor contribution from Rayleigh fractionation of the NO3- pool. Compound specific δ 13C values (cholest-5-en-3β-ol, cholesta-5,22-dien-3β-ol, 24-methylcholesta-5,22-dien-3β-ol, 24-methylcholesta-24(28)-dien-3β-ol and alkenones) are also enriched in the Fe fertilised region relative to other areas, presumably reflecting higher phytoplankton growth rate, consumption of dissolved inorganic carbon and perhaps more intense use of carbon concentrating mechanisms. The observations confirm previous interpretations that Fe fertilisation in the Crozet region has affected nutrient utilisation and the algal community structure; it also suggests that lipid biomarkers and their δ 13C values record a specific bloom signature that may be recorded in underlying sediments.

UR - http://www.scopus.com/inward/record.url?scp=77954312354&partnerID=8YFLogxK

U2 - 10.1016/j.orggeochem.2010.05.014

DO - 10.1016/j.orggeochem.2010.05.014

M3 - Article

AN - SCOPUS:77954312354

VL - 41

SP - 767

EP - 778

JO - Organic Geochemistry

JF - Organic Geochemistry

SN - 0146-6380

IS - 8

ER -