The University of Southampton
University of Southampton Institutional Repository

Oxygen dynamics in shelf seas sediments incorporating seasonal variability

Oxygen dynamics in shelf seas sediments incorporating seasonal variability
Oxygen dynamics in shelf seas sediments incorporating seasonal variability
Shelf sediments play a vital role in global biogeochemical cycling and are particularly important areas of oxygen consumption and carbon mineralisation. Total benthic oxygen uptake, the sum of diffusive and faunal mediated uptake, is a robust proxy to quantify carbon mineralisation. However, oxygen uptake rates are dynamic, due to the diagenetic processes within the sediment, and can be spatially and temporally variable. Four benthic sites in the Celtic Sea, encompassing gradients of cohesive to permeable sediments, were sampled over four cruises to capture seasonal and spatial changes in oxygen dynamics. Total oxygen uptake (TOU) rates were measured through a suite of incubation experiments and oxygen microelectrode profiles were taken across all four benthic sites to provide the oxygen penetration depth and diffusive oxygen uptake (DOU) rates. The difference between TOU and DOU allowed for quantification of the fauna mediated oxygen uptake and diffusive uptake. High resolution measurements showed clear seasonal and spatial trends, with higher oxygen uptake rates measured in cohesive sediments compared to the permeable sediment. The significant differences in oxygen dynamics between the sediment types were consistent between seasons, with increasing oxygen consumption during and after the phytoplankton bloom. Carbon mineralisation in shelf sediments is strongly influenced by sediment type and seasonality.
0168-2563
35-47
Hicks, N.
9e3e5e05-61af-46f3-96a0-eabb1428a098
Ubbara, G. R.
8ecb1065-0428-4a0b-a22b-954cb980a2ae
Silburn, B.
9f271f0e-642a-4c41-84c6-f2cd5d61dcb7
Smith, Helen E.K.
e9ebdc59-6964-49b5-a2cd-b76d58ab77e1
Kröger, S.
83af1778-fbee-4d45-8bb1-960ad5ab0d0e
Parker, E. R.
1e7487cc-7ddf-4c56-9a6c-c6b1aafdaa3f
Sivyer, D.
ecba4f0a-9fbb-4d88-8807-13d313ed9b75
Kitidis, V.
945c00c4-55ab-4fd2-b912-0b07530ca2e5
Hatton, A.
6c347912-0a27-4cff-8bd1-14c7cc72eca2
Mayor, D.J.
461ddc80-a25d-45b5-873f-9cbf4aa93828
Stahl, H.
9bdc8025-1155-4459-8801-eb878019e108
Hicks, N.
9e3e5e05-61af-46f3-96a0-eabb1428a098
Ubbara, G. R.
8ecb1065-0428-4a0b-a22b-954cb980a2ae
Silburn, B.
9f271f0e-642a-4c41-84c6-f2cd5d61dcb7
Smith, Helen E.K.
e9ebdc59-6964-49b5-a2cd-b76d58ab77e1
Kröger, S.
83af1778-fbee-4d45-8bb1-960ad5ab0d0e
Parker, E. R.
1e7487cc-7ddf-4c56-9a6c-c6b1aafdaa3f
Sivyer, D.
ecba4f0a-9fbb-4d88-8807-13d313ed9b75
Kitidis, V.
945c00c4-55ab-4fd2-b912-0b07530ca2e5
Hatton, A.
6c347912-0a27-4cff-8bd1-14c7cc72eca2
Mayor, D.J.
461ddc80-a25d-45b5-873f-9cbf4aa93828
Stahl, H.
9bdc8025-1155-4459-8801-eb878019e108

Hicks, N., Ubbara, G. R., Silburn, B., Smith, Helen E.K., Kröger, S., Parker, E. R., Sivyer, D., Kitidis, V., Hatton, A., Mayor, D.J. and Stahl, H. (2017) Oxygen dynamics in shelf seas sediments incorporating seasonal variability. Biogeochemistry, 135 (1-2), 35-47. (doi:10.1007/s10533-017-0326-9).

Record type: Article

Abstract

Shelf sediments play a vital role in global biogeochemical cycling and are particularly important areas of oxygen consumption and carbon mineralisation. Total benthic oxygen uptake, the sum of diffusive and faunal mediated uptake, is a robust proxy to quantify carbon mineralisation. However, oxygen uptake rates are dynamic, due to the diagenetic processes within the sediment, and can be spatially and temporally variable. Four benthic sites in the Celtic Sea, encompassing gradients of cohesive to permeable sediments, were sampled over four cruises to capture seasonal and spatial changes in oxygen dynamics. Total oxygen uptake (TOU) rates were measured through a suite of incubation experiments and oxygen microelectrode profiles were taken across all four benthic sites to provide the oxygen penetration depth and diffusive oxygen uptake (DOU) rates. The difference between TOU and DOU allowed for quantification of the fauna mediated oxygen uptake and diffusive uptake. High resolution measurements showed clear seasonal and spatial trends, with higher oxygen uptake rates measured in cohesive sediments compared to the permeable sediment. The significant differences in oxygen dynamics between the sediment types were consistent between seasons, with increasing oxygen consumption during and after the phytoplankton bloom. Carbon mineralisation in shelf sediments is strongly influenced by sediment type and seasonality.

Text
10.1007_s10533-017-0326-9 - Version of Record
Restricted to Repository staff only
Text
10.1007_s10533-017-0326-9 - Version of Record
Available under License Creative Commons Attribution.
Download (2MB)
Text
10.1007_s10533-017-0326-9 - Proof
Restricted to Repository staff only

More information

Accepted/In Press date: 22 March 2017
e-pub ahead of print date: 29 March 2017
Published date: 1 September 2017

Identifiers

Local EPrints ID: 413514
URI: http://eprints.soton.ac.uk/id/eprint/413514
ISSN: 0168-2563
PURE UUID: 4f084977-57ab-4c14-8f3c-411c7ffc4e45

Catalogue record

Date deposited: 25 Aug 2017 16:31
Last modified: 27 Apr 2022 10:01

Export record

Altmetrics

Contributors

Author: N. Hicks
Author: G. R. Ubbara
Author: B. Silburn
Author: Helen E.K. Smith
Author: S. Kröger
Author: E. R. Parker
Author: D. Sivyer
Author: V. Kitidis
Author: A. Hatton
Author: D.J. Mayor
Author: H. Stahl

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×