Hydrostatic pressure impedes the degradation of sinking copepod carcasses and fecal pellets
Abstract Fast-sinking zooplankton carcasses and fecal pellets appear to contribute significantly to the vertical transport of particulate organic carbon (POC), partly because of low temperature that decreases microbial degradation during the descent into the deep ocean. Increasing hydrostatic pressu...
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Oxford University Press (OUP)
2024
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Online Access: | http://dx.doi.org/10.1093/plankt/fbae002 https://academic.oup.com/plankt/article-pdf/46/2/219/57138225/fbae002.pdf |
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croxfordunivpr:10.1093/plankt/fbae002 2024-04-28T08:15:05+00:00 Hydrostatic pressure impedes the degradation of sinking copepod carcasses and fecal pellets Franco-Cisterna, Belén Stief, Peter Glud, Ronnie N Koski, Marja Danish National Research Foundation Danish Center for Hadal Research, HADAL 2024 http://dx.doi.org/10.1093/plankt/fbae002 https://academic.oup.com/plankt/article-pdf/46/2/219/57138225/fbae002.pdf en eng Oxford University Press (OUP) https://creativecommons.org/licenses/by/4.0/ Journal of Plankton Research volume 46, issue 2, page 219-223 ISSN 0142-7873 1464-3774 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2024 croxfordunivpr https://doi.org/10.1093/plankt/fbae002 2024-04-09T07:55:11Z Abstract Fast-sinking zooplankton carcasses and fecal pellets appear to contribute significantly to the vertical transport of particulate organic carbon (POC), partly because of low temperature that decreases microbial degradation during the descent into the deep ocean. Increasing hydrostatic pressure could further reduce the degradation efficiency of sinking POC, but this effect remains unexplored. Here, the degradation of carcasses and fecal pellets of the abundant marine copepod Calanus finmarchicus was experimentally studied as a function of pressure (0.1–100 MPa). Samples were either exposed to elevated pressure in short 1-day incubations or a gradual pressure increase, simulating continuous particle sinking during a 20-day incubation. Both experiments revealed gradual inhibition of microbial respiration in the pressure range of 20–100 MPa, corresponding to 2–10-km depth. This suggests that hydrostatic pressure impedes carbon mineralization of fast-sinking carcasses and fecal pellets and enhances the deep-sea deposition rate of zooplankton-derived organic material. Article in Journal/Newspaper Calanus finmarchicus Oxford University Press Journal of Plankton Research |
institution |
Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Franco-Cisterna, Belén Stief, Peter Glud, Ronnie N Hydrostatic pressure impedes the degradation of sinking copepod carcasses and fecal pellets |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract Fast-sinking zooplankton carcasses and fecal pellets appear to contribute significantly to the vertical transport of particulate organic carbon (POC), partly because of low temperature that decreases microbial degradation during the descent into the deep ocean. Increasing hydrostatic pressure could further reduce the degradation efficiency of sinking POC, but this effect remains unexplored. Here, the degradation of carcasses and fecal pellets of the abundant marine copepod Calanus finmarchicus was experimentally studied as a function of pressure (0.1–100 MPa). Samples were either exposed to elevated pressure in short 1-day incubations or a gradual pressure increase, simulating continuous particle sinking during a 20-day incubation. Both experiments revealed gradual inhibition of microbial respiration in the pressure range of 20–100 MPa, corresponding to 2–10-km depth. This suggests that hydrostatic pressure impedes carbon mineralization of fast-sinking carcasses and fecal pellets and enhances the deep-sea deposition rate of zooplankton-derived organic material. |
author2 |
Koski, Marja Danish National Research Foundation Danish Center for Hadal Research, HADAL |
format |
Article in Journal/Newspaper |
author |
Franco-Cisterna, Belén Stief, Peter Glud, Ronnie N |
author_facet |
Franco-Cisterna, Belén Stief, Peter Glud, Ronnie N |
author_sort |
Franco-Cisterna, Belén |
title |
Hydrostatic pressure impedes the degradation of sinking copepod carcasses and fecal pellets |
title_short |
Hydrostatic pressure impedes the degradation of sinking copepod carcasses and fecal pellets |
title_full |
Hydrostatic pressure impedes the degradation of sinking copepod carcasses and fecal pellets |
title_fullStr |
Hydrostatic pressure impedes the degradation of sinking copepod carcasses and fecal pellets |
title_full_unstemmed |
Hydrostatic pressure impedes the degradation of sinking copepod carcasses and fecal pellets |
title_sort |
hydrostatic pressure impedes the degradation of sinking copepod carcasses and fecal pellets |
publisher |
Oxford University Press (OUP) |
publishDate |
2024 |
url |
http://dx.doi.org/10.1093/plankt/fbae002 https://academic.oup.com/plankt/article-pdf/46/2/219/57138225/fbae002.pdf |
genre |
Calanus finmarchicus |
genre_facet |
Calanus finmarchicus |
op_source |
Journal of Plankton Research volume 46, issue 2, page 219-223 ISSN 0142-7873 1464-3774 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1093/plankt/fbae002 |
container_title |
Journal of Plankton Research |
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1797580858049167360 |