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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...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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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. |
format | Online Article Text |
id | pubmed-8660819 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
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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