Organic Matter Supply and Utilization in Oxygen Minimum Zones
Organic matter (OM) plays a significant role in the formation of oxygen minimum zones (OMZs) and associated biogeochemical cycling. OM supply processes to the OMZ include physical transport, particle formation, and sinking as well as active transport by migrating zooplankton and nekton. In addition...
Published in: | Annual Review of Marine Science |
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Annual Reviews
2022
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ftoceanrep:oai:oceanrep.geomar.de:54232 2024-02-11T10:06:28+01:00 Organic Matter Supply and Utilization in Oxygen Minimum Zones Engel, Anja Kiko, Rainer Dengler, Marcus 2022-01 text https://oceanrep.geomar.de/id/eprint/54232/ https://oceanrep.geomar.de/id/eprint/54232/7/annurev-marine-041921-090849.pdf https://doi.org/10.1146/annurev-marine-041921-090849 en eng Annual Reviews https://oceanrep.geomar.de/id/eprint/54232/7/annurev-marine-041921-090849.pdf Engel, A. , Kiko, R. and Dengler, M. (2022) Organic Matter Supply and Utilization in Oxygen Minimum Zones. Annual Review of Marine Science, 14 (1). pp. 355-378. DOI 10.1146/annurev-marine-041921-090849 <https://doi.org/10.1146/annurev-marine-041921-090849>. doi:10.1146/annurev-marine-041921-090849 info:eu-repo/semantics/restrictedAccess Article PeerReviewed info:eu-repo/semantics/article 2022 ftoceanrep https://doi.org/10.1146/annurev-marine-041921-090849 2024-01-15T00:24:17Z Organic matter (OM) plays a significant role in the formation of oxygen minimum zones (OMZs) and associated biogeochemical cycling. OM supply processes to the OMZ include physical transport, particle formation, and sinking as well as active transport by migrating zooplankton and nekton. In addition to the availability of oxygen and other electron acceptors, the remineralization rate of OM is controlled by its biochemical quality. Enhanced microbial respiration of OM can induce anoxic microzones in an otherwise oxygenated water column. Reduced OM degradation under low-oxygen conditions, on the other hand, may increase the CO2 storage time in the ocean. Understanding the interdependencies between OM and oxygen cycling is of high relevance for an ocean facing deoxygenation as a consequence of global warming. In this review, we describe OM fluxes into and cycling within two large OMZs associated with eastern boundary upwelling systems that differ greatly in the extent of oxygen loss: the highly oxygen-depleted OMZ in the tropical South Pacific and the moderately hypoxic OMZ in the tropical North Atlantic. We summarize new findings from a large German collaborative research project, Collaborative Research Center 754 (SFB 754), and identify knowledge gaps and future research priorities. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Pacific Annual Review of Marine Science 14 1 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Organic matter (OM) plays a significant role in the formation of oxygen minimum zones (OMZs) and associated biogeochemical cycling. OM supply processes to the OMZ include physical transport, particle formation, and sinking as well as active transport by migrating zooplankton and nekton. In addition to the availability of oxygen and other electron acceptors, the remineralization rate of OM is controlled by its biochemical quality. Enhanced microbial respiration of OM can induce anoxic microzones in an otherwise oxygenated water column. Reduced OM degradation under low-oxygen conditions, on the other hand, may increase the CO2 storage time in the ocean. Understanding the interdependencies between OM and oxygen cycling is of high relevance for an ocean facing deoxygenation as a consequence of global warming. In this review, we describe OM fluxes into and cycling within two large OMZs associated with eastern boundary upwelling systems that differ greatly in the extent of oxygen loss: the highly oxygen-depleted OMZ in the tropical South Pacific and the moderately hypoxic OMZ in the tropical North Atlantic. We summarize new findings from a large German collaborative research project, Collaborative Research Center 754 (SFB 754), and identify knowledge gaps and future research priorities. |
format |
Article in Journal/Newspaper |
author |
Engel, Anja Kiko, Rainer Dengler, Marcus |
spellingShingle |
Engel, Anja Kiko, Rainer Dengler, Marcus Organic Matter Supply and Utilization in Oxygen Minimum Zones |
author_facet |
Engel, Anja Kiko, Rainer Dengler, Marcus |
author_sort |
Engel, Anja |
title |
Organic Matter Supply and Utilization in Oxygen Minimum Zones |
title_short |
Organic Matter Supply and Utilization in Oxygen Minimum Zones |
title_full |
Organic Matter Supply and Utilization in Oxygen Minimum Zones |
title_fullStr |
Organic Matter Supply and Utilization in Oxygen Minimum Zones |
title_full_unstemmed |
Organic Matter Supply and Utilization in Oxygen Minimum Zones |
title_sort |
organic matter supply and utilization in oxygen minimum zones |
publisher |
Annual Reviews |
publishDate |
2022 |
url |
https://oceanrep.geomar.de/id/eprint/54232/ https://oceanrep.geomar.de/id/eprint/54232/7/annurev-marine-041921-090849.pdf https://doi.org/10.1146/annurev-marine-041921-090849 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/54232/7/annurev-marine-041921-090849.pdf Engel, A. , Kiko, R. and Dengler, M. (2022) Organic Matter Supply and Utilization in Oxygen Minimum Zones. Annual Review of Marine Science, 14 (1). pp. 355-378. DOI 10.1146/annurev-marine-041921-090849 <https://doi.org/10.1146/annurev-marine-041921-090849>. doi:10.1146/annurev-marine-041921-090849 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1146/annurev-marine-041921-090849 |
container_title |
Annual Review of Marine Science |
container_volume |
14 |
container_issue |
1 |
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1790604201241346048 |