Modeling the Impact of Macrozooplankton on Carbon Export Production in the Southern Ocean
Macrozooplankton and its grazing pressure shape ecosystem structures and carbon pathways in the Southern Ocean. Here, we present the implementation of “polar macrozooplankton” as a plankton functional type and a related fast-sinking detritus class (fecal pellets) into the biogeochemical model REcoM-...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2021
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/55195/ https://epic.awi.de/id/eprint/55195/1/2021JC017315.pdf https://doi.org/10.1029/2021JC017315 https://hdl.handle.net/10013/epic.6f378bd3-08af-4f38-a6de-9525be3bec35 https://hdl.handle.net/ |
id |
ftawi:oai:epic.awi.de:55195 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:55195 2023-05-15T18:23:40+02:00 Modeling the Impact of Macrozooplankton on Carbon Export Production in the Southern Ocean Karakuş, Onur Völker, Christoph Iversen, Morten Hagen, Wilhelm Wolf‐Gladrow, Dieter Fach, Bettina Hauck, Judith 2021-11-04 application/pdf https://epic.awi.de/id/eprint/55195/ https://epic.awi.de/id/eprint/55195/1/2021JC017315.pdf https://doi.org/10.1029/2021JC017315 https://hdl.handle.net/10013/epic.6f378bd3-08af-4f38-a6de-9525be3bec35 https://hdl.handle.net/ unknown https://epic.awi.de/id/eprint/55195/1/2021JC017315.pdf https://hdl.handle.net/ Karakuş, O. orcid:0000-0002-9838-3657 , Völker, C. orcid:0000-0003-3032-114X , Iversen, M. orcid:0000-0002-5287-1110 , Hagen, W. orcid:0000-0002-7462-9931 , Wolf‐Gladrow, D. orcid:0000-0001-9531-8668 , Fach, B. orcid:0000-0003-4688-1918 and Hauck, J. orcid:0000-0003-4723-9652 (2021) Modeling the Impact of Macrozooplankton on Carbon Export Production in the Southern Ocean , Journal of Geophysical Research: Oceans, 126 (12) . doi:10.1029/2021JC017315 <https://doi.org/10.1029/2021JC017315> , hdl:10013/epic.6f378bd3-08af-4f38-a6de-9525be3bec35 EPIC3Journal of Geophysical Research: Oceans, 126(12), ISSN: 2169-9275 Article isiRev 2021 ftawi https://doi.org/10.1029/2021JC017315 2021-12-24T15:46:40Z Macrozooplankton and its grazing pressure shape ecosystem structures and carbon pathways in the Southern Ocean. Here, we present the implementation of “polar macrozooplankton” as a plankton functional type and a related fast-sinking detritus class (fecal pellets) into the biogeochemical model REcoM-2. We use the model to assess major carbon pathways and ecosystem structure in the Southern Ocean south of 50°S. The model represents zooplankton biomass and its spatial distribution in the Southern Ocean reasonably well in comparison to available biomass data. A distinct difference of our model from previous versions is the seasonal pattern of particle formation processes and ecosystem structures in the Southern Ocean. REcoM-2 now captures high zooplankton biomass and a typical shift from a dominance of phytodetrital aggregates in spring to zooplankton fecal pellets later in the year. At sites with high biomass of macrozooplankton, the transfer efficiency of particulate organic carbon can be as high as 50%, and the carbon content of the exported material increases. In our simulations, macrozooplankton is an important component of the Southern Ocean plankton community, contributing up to 0.12 Pg C per year (14%) to total modeled carbon export across 100 m depth. Macrozooplankton changes the phytoplankton composition and supports the recycling of macronutrients. These results support the important role of macrozooplankton such as krill in the Southern Ocean and have implications for the representation of Southern Ocean biogeochemical cycles in models. Article in Journal/Newspaper Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Southern Ocean Journal of Geophysical Research: Oceans 126 12 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Macrozooplankton and its grazing pressure shape ecosystem structures and carbon pathways in the Southern Ocean. Here, we present the implementation of “polar macrozooplankton” as a plankton functional type and a related fast-sinking detritus class (fecal pellets) into the biogeochemical model REcoM-2. We use the model to assess major carbon pathways and ecosystem structure in the Southern Ocean south of 50°S. The model represents zooplankton biomass and its spatial distribution in the Southern Ocean reasonably well in comparison to available biomass data. A distinct difference of our model from previous versions is the seasonal pattern of particle formation processes and ecosystem structures in the Southern Ocean. REcoM-2 now captures high zooplankton biomass and a typical shift from a dominance of phytodetrital aggregates in spring to zooplankton fecal pellets later in the year. At sites with high biomass of macrozooplankton, the transfer efficiency of particulate organic carbon can be as high as 50%, and the carbon content of the exported material increases. In our simulations, macrozooplankton is an important component of the Southern Ocean plankton community, contributing up to 0.12 Pg C per year (14%) to total modeled carbon export across 100 m depth. Macrozooplankton changes the phytoplankton composition and supports the recycling of macronutrients. These results support the important role of macrozooplankton such as krill in the Southern Ocean and have implications for the representation of Southern Ocean biogeochemical cycles in models. |
format |
Article in Journal/Newspaper |
author |
Karakuş, Onur Völker, Christoph Iversen, Morten Hagen, Wilhelm Wolf‐Gladrow, Dieter Fach, Bettina Hauck, Judith |
spellingShingle |
Karakuş, Onur Völker, Christoph Iversen, Morten Hagen, Wilhelm Wolf‐Gladrow, Dieter Fach, Bettina Hauck, Judith Modeling the Impact of Macrozooplankton on Carbon Export Production in the Southern Ocean |
author_facet |
Karakuş, Onur Völker, Christoph Iversen, Morten Hagen, Wilhelm Wolf‐Gladrow, Dieter Fach, Bettina Hauck, Judith |
author_sort |
Karakuş, Onur |
title |
Modeling the Impact of Macrozooplankton on Carbon Export Production in the Southern Ocean |
title_short |
Modeling the Impact of Macrozooplankton on Carbon Export Production in the Southern Ocean |
title_full |
Modeling the Impact of Macrozooplankton on Carbon Export Production in the Southern Ocean |
title_fullStr |
Modeling the Impact of Macrozooplankton on Carbon Export Production in the Southern Ocean |
title_full_unstemmed |
Modeling the Impact of Macrozooplankton on Carbon Export Production in the Southern Ocean |
title_sort |
modeling the impact of macrozooplankton on carbon export production in the southern ocean |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/55195/ https://epic.awi.de/id/eprint/55195/1/2021JC017315.pdf https://doi.org/10.1029/2021JC017315 https://hdl.handle.net/10013/epic.6f378bd3-08af-4f38-a6de-9525be3bec35 https://hdl.handle.net/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
EPIC3Journal of Geophysical Research: Oceans, 126(12), ISSN: 2169-9275 |
op_relation |
https://epic.awi.de/id/eprint/55195/1/2021JC017315.pdf https://hdl.handle.net/ Karakuş, O. orcid:0000-0002-9838-3657 , Völker, C. orcid:0000-0003-3032-114X , Iversen, M. orcid:0000-0002-5287-1110 , Hagen, W. orcid:0000-0002-7462-9931 , Wolf‐Gladrow, D. orcid:0000-0001-9531-8668 , Fach, B. orcid:0000-0003-4688-1918 and Hauck, J. orcid:0000-0003-4723-9652 (2021) Modeling the Impact of Macrozooplankton on Carbon Export Production in the Southern Ocean , Journal of Geophysical Research: Oceans, 126 (12) . doi:10.1029/2021JC017315 <https://doi.org/10.1029/2021JC017315> , hdl:10013/epic.6f378bd3-08af-4f38-a6de-9525be3bec35 |
op_doi |
https://doi.org/10.1029/2021JC017315 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
12 |
_version_ |
1766203738681245696 |