Articles | Volume 12, issue 16
Biogeosciences, 12, 4979–4992, 2015
https://doi.org/10.5194/bg-12-4979-2015

Special issue: Low oxygen environments in marine, fresh and estuarine...

Biogeosciences, 12, 4979–4992, 2015
https://doi.org/10.5194/bg-12-4979-2015

Research article 21 Aug 2015

Research article | 21 Aug 2015

Assessing the potential of amino acid 13C patterns as a carbon source tracer in marine sediments: effects of algal growth conditions and sedimentary diagenesis

T. Larsen et al.

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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Thomas Larsen on behalf of the Authors (16 Jun 2015)  Author's response
ED: Publish subject to minor revisions (Editor review) (07 Jul 2015) by Véronique Garçon
AR by Anna Wenzel on behalf of the Authors (15 Jul 2015)  Author's response    Manuscript
ED: Publish as is (05 Aug 2015) by Véronique Garçon
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Short summary
A tiny fraction of marine algae escapes decomposition and is buried in sediments. Since tools are needed to track the fate of algal organic carbon, we tested whether naturally occurring isotope variability among amino acids from algae and bacteria can be used as source diagnostic fingerprints. We found that isotope fingerprints track algal amino acid sources with high fidelity across different growth conditions, and that the fingerprints can be used to quantify bacterial amino acids in sediment.
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