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Isotopic composition of carbonate-bound organic nitrogen in deep-sea scleractinian corals: A new window into past biogeochemical change

Wang, Xingchen T. and Prokopenko, Maria G. and Sigman, Daniel M. and Adkins, Jess F. and Robinson, Laura F. and Ren, Haojia and Oleynik, Sergey and Williams, Branwen and Haug, Gerald H. (2014) Isotopic composition of carbonate-bound organic nitrogen in deep-sea scleractinian corals: A new window into past biogeochemical change. Earth and Planetary Science Letters, 400 . pp. 243-250. ISSN 0012-821X. https://resolver.caltech.edu/CaltechAUTHORS:20140814-105117352

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Abstract

Over the last two decades, the skeletal remains of deep-sea corals have arisen as a geochemical archive of Pleistocene oceanographic change. Here we report the exploration of the isotopic composition of the carbonate-bound organic nitrogen (hereafter, CB-δ^(15)N) in the deep-sea scleractinian coral Desmophyllum dianthus as a possible tool for reconstructing past changes in the ocean nitrogen cycle. The measurement protocol is adapted from a high-sensitivity method for foraminifera shell-bound δ^(15)N. We explored the variability of CB-δ^(15)N within specimens, among corals collected at different depths in a given ocean region, and among different ocean regions. Modern D. dianthus CB-δ^(15)N is strongly correlated with the δ^(15)N of N export as estimated from sediment traps, shallow subsurface nitrate, and surface sediments, suggesting that CB-δ^(15)N is a reliable proxy for δ^(15)N of N export. D. dianthus CB-δ^(15)N is consistently 8–9‰8–9‰ higher than δ^(15)N of N export, indicating that D. dianthus acquires its nutrition primarily from suspended particulate organic matter (POM) that derives from sinking POM, not directly from sinking POM.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.epsl.2014.05.048DOIArticle
http://www.sciencedirect.com/science/article/pii/S0012821X14003586PublisherArticle
http://www.sciencedirect.com/science/MiamiMultiMediaURL/1-s2.0-S0012821X14003586/1-s2.0-S0012821X14003586-mmc1.xlsx/271830/FULL/S0012821X14003586/8139613d4cc37887a75c65b3f2e4df53/mmc1.xlsxPublisherSupplemental material
ORCID:
AuthorORCID
Sigman, Daniel M.0000-0002-7923-1973
Adkins, Jess F.0000-0002-3174-5190
Additional Information:© 2014 Elsevier B.V. Received 25 March 2014, Revised 10 May 2014, Accepted 26 May 2014, Available online 12 June 2014. We thank Stephen D. Cairns (Smithsonian Institution National Museum of Natural History) and Ewann A. Bertson (NOAA) for providing D. dianthus samples and Eric D. Galbraith for providing the complete NICOPP data set. We also thank two anonymous reviewers for providing insightful comments. This work is supported by NSF grant OCE-1234664 to M.G.P. and B.W., the Grand Challenges Program of Princeton University, the Tuttle Fund of the Department of Geosciences at Princeton University, European Research Council, Marie Curie Reintegration Grant, and The Leverhulme Trust.
Funders:
Funding AgencyGrant Number
NSFOCE-1234664
Princeton University Grand Challenges ProgramUNSPECIFIED
Princeton University Department of Geosciences Tuttle FundUNSPECIFIED
European Research CouncilUNSPECIFIED
Marie Curie Reintegration GrantUNSPECIFIED
Leverhulme TrustUNSPECIFIED
Subject Keywords:nitrogen isotopes; deep-sea scleractinian corals; ocean nitrogen cycle; paleoceanography
Record Number:CaltechAUTHORS:20140814-105117352
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140814-105117352
Official Citation:Xingchen T. Wang, Maria G. Prokopenko, Daniel M. Sigman, Jess F. Adkins, Laura F. Robinson, Haojia Ren, Sergey Oleynik, Branwen Williams, Gerald H. Haug, Isotopic composition of carbonate-bound organic nitrogen in deep-sea scleractinian corals: A new window into past biogeochemical change, Earth and Planetary Science Letters, Volume 400, 15 August 2014, Pages 243-250, ISSN 0012-821X, http://dx.doi.org/10.1016/j.epsl.2014.05.048. (http://www.sciencedirect.com/science/article/pii/S0012821X14003586)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48557
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:14 Aug 2014 20:40
Last Modified:09 Mar 2020 13:19

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