The influence of ocean acidification on nitrogen regeneration and nitrous oxide production in the North-West European shelf sea
The assimilation and regeneration of dissolved inorganic nitrogen, and the concentration of N2O, was investigated at stations located in the NW European shelf sea during June/July 2011. These observational measurements within the photic zone demonstrated the simultaneous regeneration and assimilatio...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2014
|
Subjects: | |
Online Access: | http://plymsea.ac.uk/id/eprint/5983/ http://plymsea.ac.uk/id/eprint/5983/1/bgd-11-3113-2014.pdf https://doi.org/10.5194/bgd-11-3113-2014 |
id |
ftplymouthml:oai:plymsea.ac.uk:5983 |
---|---|
record_format |
openpolar |
spelling |
ftplymouthml:oai:plymsea.ac.uk:5983 2023-05-15T17:50:59+02:00 The influence of ocean acidification on nitrogen regeneration and nitrous oxide production in the North-West European shelf sea Clark, DR Brown, IJ Rees, AP Somerfield, PJ Miller, PI 2014 text http://plymsea.ac.uk/id/eprint/5983/ http://plymsea.ac.uk/id/eprint/5983/1/bgd-11-3113-2014.pdf https://doi.org/10.5194/bgd-11-3113-2014 en eng http://plymsea.ac.uk/id/eprint/5983/1/bgd-11-3113-2014.pdf Clark, DR; Brown, IJ; Rees, AP; Somerfield, PJ; Miller, PI. 2014 The influence of ocean acidification on nitrogen regeneration and nitrous oxide production in the North-West European shelf sea. Biogeosciences Discussions, 11. 3113-3165. https://doi.org/10.5194/bgd-11-3113-2014 <https://doi.org/10.5194/bgd-11-3113-2014> Oceanography Publication - Article PeerReviewed 2014 ftplymouthml https://doi.org/10.5194/bgd-11-3113-2014 2022-09-13T05:48:28Z The assimilation and regeneration of dissolved inorganic nitrogen, and the concentration of N2O, was investigated at stations located in the NW European shelf sea during June/July 2011. These observational measurements within the photic zone demonstrated the simultaneous regeneration and assimilation of NH4+, NO2− and NO3−. NH4+ was assimilated at 1.82–49.12 nmol N L−1 h−1 and regenerated at 3.46–14.60 nmol N L−1 h−1; NO2− was assimilated at 0–2.08 nmol N L−1 h−1 and regenerated at 0.01–1.85 nmol N L−1 h−1; NO3− was assimilated at 0.67–18.75 nmol N L−1 h−1 and regenerated at 0.05–28.97 nmol N L−1 h−1. Observations implied that these processes were closely coupled at the regional scale and nitrogen recycling played an important role in sustaining phytoplankton growth during the summer. The [N2O], measured in water column profiles, was 10.13 ± 1.11 nmol L−1 and did not strongly diverge from atmospheric equilibrium indicating that sampled marine regions where neither a strong source nor sink of N2O to the atmosphere. Multivariate analysis of data describing water column biogeochemistry and its links to N-cycling activity failed to explain the observed variance in rates of N-regeneration and N-assimilation, possibly due to the limited number of process rate observations. In the surface waters of 5 further stations, Ocean Acidification (OA) bioassay experiments were conducted to investigate the response of NH4+ oxidising and regenerating organisms to simulated OA conditions, including the implications for [N2O]. Multivariate analysis was undertaken which considered the complete bioassay dataset of measured variables describing changes in N-regeneration rate, [N2O] and the biogeochemical composition of seawater. While anticipating biogeochemical differences between locations, we aimed to test the hypothesis that the underlying mechanism through which pelagic N-regeneration responded to simulated OA conditions was independent of location and that a mechanistic understanding of how NH4+ oxidation, NH4+ regeneration and ... Article in Journal/Newspaper Ocean acidification Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML) |
institution |
Open Polar |
collection |
Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML) |
op_collection_id |
ftplymouthml |
language |
English |
topic |
Oceanography |
spellingShingle |
Oceanography Clark, DR Brown, IJ Rees, AP Somerfield, PJ Miller, PI The influence of ocean acidification on nitrogen regeneration and nitrous oxide production in the North-West European shelf sea |
topic_facet |
Oceanography |
description |
The assimilation and regeneration of dissolved inorganic nitrogen, and the concentration of N2O, was investigated at stations located in the NW European shelf sea during June/July 2011. These observational measurements within the photic zone demonstrated the simultaneous regeneration and assimilation of NH4+, NO2− and NO3−. NH4+ was assimilated at 1.82–49.12 nmol N L−1 h−1 and regenerated at 3.46–14.60 nmol N L−1 h−1; NO2− was assimilated at 0–2.08 nmol N L−1 h−1 and regenerated at 0.01–1.85 nmol N L−1 h−1; NO3− was assimilated at 0.67–18.75 nmol N L−1 h−1 and regenerated at 0.05–28.97 nmol N L−1 h−1. Observations implied that these processes were closely coupled at the regional scale and nitrogen recycling played an important role in sustaining phytoplankton growth during the summer. The [N2O], measured in water column profiles, was 10.13 ± 1.11 nmol L−1 and did not strongly diverge from atmospheric equilibrium indicating that sampled marine regions where neither a strong source nor sink of N2O to the atmosphere. Multivariate analysis of data describing water column biogeochemistry and its links to N-cycling activity failed to explain the observed variance in rates of N-regeneration and N-assimilation, possibly due to the limited number of process rate observations. In the surface waters of 5 further stations, Ocean Acidification (OA) bioassay experiments were conducted to investigate the response of NH4+ oxidising and regenerating organisms to simulated OA conditions, including the implications for [N2O]. Multivariate analysis was undertaken which considered the complete bioassay dataset of measured variables describing changes in N-regeneration rate, [N2O] and the biogeochemical composition of seawater. While anticipating biogeochemical differences between locations, we aimed to test the hypothesis that the underlying mechanism through which pelagic N-regeneration responded to simulated OA conditions was independent of location and that a mechanistic understanding of how NH4+ oxidation, NH4+ regeneration and ... |
format |
Article in Journal/Newspaper |
author |
Clark, DR Brown, IJ Rees, AP Somerfield, PJ Miller, PI |
author_facet |
Clark, DR Brown, IJ Rees, AP Somerfield, PJ Miller, PI |
author_sort |
Clark, DR |
title |
The influence of ocean acidification on nitrogen regeneration and nitrous oxide production in the North-West European shelf sea |
title_short |
The influence of ocean acidification on nitrogen regeneration and nitrous oxide production in the North-West European shelf sea |
title_full |
The influence of ocean acidification on nitrogen regeneration and nitrous oxide production in the North-West European shelf sea |
title_fullStr |
The influence of ocean acidification on nitrogen regeneration and nitrous oxide production in the North-West European shelf sea |
title_full_unstemmed |
The influence of ocean acidification on nitrogen regeneration and nitrous oxide production in the North-West European shelf sea |
title_sort |
influence of ocean acidification on nitrogen regeneration and nitrous oxide production in the north-west european shelf sea |
publishDate |
2014 |
url |
http://plymsea.ac.uk/id/eprint/5983/ http://plymsea.ac.uk/id/eprint/5983/1/bgd-11-3113-2014.pdf https://doi.org/10.5194/bgd-11-3113-2014 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://plymsea.ac.uk/id/eprint/5983/1/bgd-11-3113-2014.pdf Clark, DR; Brown, IJ; Rees, AP; Somerfield, PJ; Miller, PI. 2014 The influence of ocean acidification on nitrogen regeneration and nitrous oxide production in the North-West European shelf sea. Biogeosciences Discussions, 11. 3113-3165. https://doi.org/10.5194/bgd-11-3113-2014 <https://doi.org/10.5194/bgd-11-3113-2014> |
op_doi |
https://doi.org/10.5194/bgd-11-3113-2014 |
_version_ |
1766157943248519168 |