ncomms Cavan et al 2017.pdf (1.04 MB)
Remineralization of particulate organic carbon in an ocean oxygen minimum zone
journal contribution
posted on 2023-05-19, 04:22 authored by Emma Cavan, Trimmer, M, Shelley, F, Sanders, RBiological oceanic processes, principally the surface production, sinking and interior remineralization of organic particles, keep atmospheric CO2 lower than if the ocean was abiotic. The remineralization length scale (RLS, the vertical distance over which organic particle flux declines by 63%, affected by particle respiration, fragmentation and sinking rates) controls the size of this effect and is anomalously high in oxygen minimum zones (OMZ). Here we show in the Eastern Tropical North Pacific OMZ 70% of POC remineralization is due to microbial respiration, indicating that the high RLS is the result of lower particle fragmentation by zooplankton, likely due to the almost complete absence of zooplankton particle interactions in OMZ waters. Hence, the sensitivity of zooplankton to ocean oxygen concentrations can have direct implications for atmospheric carbon sequestration. Future expansion of OMZs is likely to increase biological ocean carbon storage and act as a negative feedback on climate change.
History
Publication title
Nature CommunicationsVolume
8Article number
14847Number
14847Pagination
1-9ISSN
2041-1723Department/School
Institute for Marine and Antarctic StudiesPublisher
Nature Publishing GroupPlace of publication
United KingdomRights statement
Copyright 2017 The Author(s). Licensed under Creative Commons Attribution 4.0 International License https://creativecommons.org/licenses/by/4.0/Repository Status
- Open