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Krill and salp faecal pellets contribute equally to the carbon flux at the Antarctic Peninsula

Krill and salps are important for carbon flux in the Southern Ocean, but the extent of their contribution and the consequences of shifts in dominance from krill to salps remain unclear. We present a direct comparison of the contribution of krill and salp faecal pellets (FP) to vertical carbon flux a...

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Autores principales: Pauli, Nora-Charlotte, Flintrop, Clara M., Konrad, Christian, Pakhomov, Evgeny A., Swoboda, Steffen, Koch, Florian, Wang, Xin-Liang, Zhang, Ji-Chang, Brierley, Andrew S., Bernasconi, Matteo, Meyer, Bettina, Iversen, Morten H.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8660819/
https://www.ncbi.nlm.nih.gov/pubmed/34887407
http://dx.doi.org/10.1038/s41467-021-27436-9
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author Pauli, Nora-Charlotte
Flintrop, Clara M.
Konrad, Christian
Pakhomov, Evgeny A.
Swoboda, Steffen
Koch, Florian
Wang, Xin-Liang
Zhang, Ji-Chang
Brierley, Andrew S.
Bernasconi, Matteo
Meyer, Bettina
Iversen, Morten H.
author_facet Pauli, Nora-Charlotte
Flintrop, Clara M.
Konrad, Christian
Pakhomov, Evgeny A.
Swoboda, Steffen
Koch, Florian
Wang, Xin-Liang
Zhang, Ji-Chang
Brierley, Andrew S.
Bernasconi, Matteo
Meyer, Bettina
Iversen, Morten H.
author_sort Pauli, Nora-Charlotte
collection PubMed
description Krill and salps are important for carbon flux in the Southern Ocean, but the extent of their contribution and the consequences of shifts in dominance from krill to salps remain unclear. We present a direct comparison of the contribution of krill and salp faecal pellets (FP) to vertical carbon flux at the Antarctic Peninsula using a combination of sediment traps, FP production, carbon content, microbial degradation, and krill and salp abundances. Salps produce 4-fold more FP carbon than krill, but the FP from both species contribute equally to the carbon flux at 300 m, accounting for 75% of total carbon. Krill FP are exported to 72% to 300 m, while 80% of salp FP are retained in the mixed layer due to fragmentation. Thus, declining krill abundances could lead to decreased carbon flux, indicating that the Antarctic Peninsula could become a less efficient carbon sink for anthropogenic CO(2) in future.
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spelling pubmed-86608192021-12-27 Krill and salp faecal pellets contribute equally to the carbon flux at the Antarctic Peninsula Pauli, Nora-Charlotte Flintrop, Clara M. Konrad, Christian Pakhomov, Evgeny A. Swoboda, Steffen Koch, Florian Wang, Xin-Liang Zhang, Ji-Chang Brierley, Andrew S. Bernasconi, Matteo Meyer, Bettina Iversen, Morten H. Nat Commun Article Krill and salps are important for carbon flux in the Southern Ocean, but the extent of their contribution and the consequences of shifts in dominance from krill to salps remain unclear. We present a direct comparison of the contribution of krill and salp faecal pellets (FP) to vertical carbon flux at the Antarctic Peninsula using a combination of sediment traps, FP production, carbon content, microbial degradation, and krill and salp abundances. Salps produce 4-fold more FP carbon than krill, but the FP from both species contribute equally to the carbon flux at 300 m, accounting for 75% of total carbon. Krill FP are exported to 72% to 300 m, while 80% of salp FP are retained in the mixed layer due to fragmentation. Thus, declining krill abundances could lead to decreased carbon flux, indicating that the Antarctic Peninsula could become a less efficient carbon sink for anthropogenic CO(2) in future. Nature Publishing Group UK 2021-12-09 /pmc/articles/PMC8660819/ /pubmed/34887407 http://dx.doi.org/10.1038/s41467-021-27436-9 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Pauli, Nora-Charlotte
Flintrop, Clara M.
Konrad, Christian
Pakhomov, Evgeny A.
Swoboda, Steffen
Koch, Florian
Wang, Xin-Liang
Zhang, Ji-Chang
Brierley, Andrew S.
Bernasconi, Matteo
Meyer, Bettina
Iversen, Morten H.
Krill and salp faecal pellets contribute equally to the carbon flux at the Antarctic Peninsula
title Krill and salp faecal pellets contribute equally to the carbon flux at the Antarctic Peninsula
title_full Krill and salp faecal pellets contribute equally to the carbon flux at the Antarctic Peninsula
title_fullStr Krill and salp faecal pellets contribute equally to the carbon flux at the Antarctic Peninsula
title_full_unstemmed Krill and salp faecal pellets contribute equally to the carbon flux at the Antarctic Peninsula
title_short Krill and salp faecal pellets contribute equally to the carbon flux at the Antarctic Peninsula
title_sort krill and salp faecal pellets contribute equally to the carbon flux at the antarctic peninsula
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8660819/
https://www.ncbi.nlm.nih.gov/pubmed/34887407
http://dx.doi.org/10.1038/s41467-021-27436-9
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