Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem
Respiration is a key metabolic process in the marine environment and contemporary phytoplankton production (PhP) is commonly assumed the main driver. However, respiration in the absence of contemporary PhP, termed baseline respiration, can influence the energetics of an ecosystem and its sensitivity...
Published in: | Frontiers in Marine Science |
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Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2020
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176451 https://doi.org/10.3389/fmars.2020.572070 |
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ftumeauniv:oai:DiVA.org:umu-176451 2023-10-09T21:49:16+02:00 Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem Vikström, Kevin Bartl, Ines Karlsson, Jan Wikner, Johan 2020 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176451 https://doi.org/10.3389/fmars.2020.572070 eng eng Umeå universitet, Institutionen för ekologi, miljö och geovetenskap Umeå universitet, Umeå marina forskningscentrum (UMF) School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom Frontiers in Marine Science, 2020, 7, orcid:0000-0001-5730-0694 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176451 doi:10.3389/fmars.2020.572070 ISI:000579837700001 Scopus 2-s2.0-85094558278 info:eu-repo/semantics/openAccess estuary oligotrophic planktonic respiration phytoplankton production baseline respiration allochthonous carbon nitrification Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Article in journal info:eu-repo/semantics/article text 2020 ftumeauniv https://doi.org/10.3389/fmars.2020.572070 2023-09-22T13:58:06Z Respiration is a key metabolic process in the marine environment and contemporary phytoplankton production (PhP) is commonly assumed the main driver. However, respiration in the absence of contemporary PhP, termed baseline respiration, can influence the energetics of an ecosystem and its sensitivity to hypoxia. Direct studies of baseline respiration are currently lacking. This study aims to obtain a first estimate of baseline respiration in a sub-arctic estuary and determine its contribution to plankton community respiration. Three approaches used to define baseline respiration determined the average rate to be 4.1 ± 0.1 (SE) mmol O2 m–3 d–1. A hypsographic model at the basin scale accounting for seasonal variation estimated an annual contribution of 30% baseline respiration to planktonic respiration. There was no correlation between plankton respiration and PhP, but a significant linear dependence was found with the total carbon supply from phytoplankton and riverine input. The sum of dissolved organic carbon transported by rivers, provided by both benthic and pelagic algae, could sustain 69% of the annual plankton respiration, of which as much as 25% occurred during winter. However, only 32% of the winter season respiration was explained, indicating that unknown carbon sources exist during the winter. Nitrification had a negligible (≤2.4%) effect on baseline respiration in the system. The results show that baseline respiration accounted for a significant percentage of coastal plankton respiration when allochthonous sources dominated the carbon supply, weakening the respiration-to- PhP relationship. Article in Journal/Newspaper Arctic Phytoplankton Umeå University: Publications (DiVA) Arctic Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
estuary oligotrophic planktonic respiration phytoplankton production baseline respiration allochthonous carbon nitrification Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser |
spellingShingle |
estuary oligotrophic planktonic respiration phytoplankton production baseline respiration allochthonous carbon nitrification Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Vikström, Kevin Bartl, Ines Karlsson, Jan Wikner, Johan Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem |
topic_facet |
estuary oligotrophic planktonic respiration phytoplankton production baseline respiration allochthonous carbon nitrification Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser |
description |
Respiration is a key metabolic process in the marine environment and contemporary phytoplankton production (PhP) is commonly assumed the main driver. However, respiration in the absence of contemporary PhP, termed baseline respiration, can influence the energetics of an ecosystem and its sensitivity to hypoxia. Direct studies of baseline respiration are currently lacking. This study aims to obtain a first estimate of baseline respiration in a sub-arctic estuary and determine its contribution to plankton community respiration. Three approaches used to define baseline respiration determined the average rate to be 4.1 ± 0.1 (SE) mmol O2 m–3 d–1. A hypsographic model at the basin scale accounting for seasonal variation estimated an annual contribution of 30% baseline respiration to planktonic respiration. There was no correlation between plankton respiration and PhP, but a significant linear dependence was found with the total carbon supply from phytoplankton and riverine input. The sum of dissolved organic carbon transported by rivers, provided by both benthic and pelagic algae, could sustain 69% of the annual plankton respiration, of which as much as 25% occurred during winter. However, only 32% of the winter season respiration was explained, indicating that unknown carbon sources exist during the winter. Nitrification had a negligible (≤2.4%) effect on baseline respiration in the system. The results show that baseline respiration accounted for a significant percentage of coastal plankton respiration when allochthonous sources dominated the carbon supply, weakening the respiration-to- PhP relationship. |
format |
Article in Journal/Newspaper |
author |
Vikström, Kevin Bartl, Ines Karlsson, Jan Wikner, Johan |
author_facet |
Vikström, Kevin Bartl, Ines Karlsson, Jan Wikner, Johan |
author_sort |
Vikström, Kevin |
title |
Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem |
title_short |
Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem |
title_full |
Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem |
title_fullStr |
Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem |
title_full_unstemmed |
Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem |
title_sort |
strong influence of baseline respiration in an oligotrophic coastal ecosystem |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2020 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176451 https://doi.org/10.3389/fmars.2020.572070 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Phytoplankton |
genre_facet |
Arctic Phytoplankton |
op_relation |
Frontiers in Marine Science, 2020, 7, orcid:0000-0001-5730-0694 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176451 doi:10.3389/fmars.2020.572070 ISI:000579837700001 Scopus 2-s2.0-85094558278 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/fmars.2020.572070 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
_version_ |
1779312286397104128 |