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...
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ftdoajarticles:oai:doaj.org/article:86fe84b6053f43b384dc73699be99a36 2023-05-15T15:11:18+02:00 Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem Kevin Vikström Ines Bartl Jan Karlsson Johan Wikner 2020-10-01T00:00:00Z https://doi.org/10.3389/fmars.2020.572070 https://doaj.org/article/86fe84b6053f43b384dc73699be99a36 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2020.572070/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.572070 https://doaj.org/article/86fe84b6053f43b384dc73699be99a36 Frontiers in Marine Science, Vol 7 (2020) estuary oligotrophic planktonic respiration phytoplankton production baseline respiration Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2020 ftdoajarticles https://doi.org/10.3389/fmars.2020.572070 2022-12-31T14:03:45Z 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 Directory of Open Access Journals: DOAJ Articles Arctic Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
estuary oligotrophic planktonic respiration phytoplankton production baseline respiration Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
estuary oligotrophic planktonic respiration phytoplankton production baseline respiration Science Q General. Including nature conservation geographical distribution QH1-199.5 Kevin Vikström Ines Bartl Jan Karlsson Johan Wikner Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem |
topic_facet |
estuary oligotrophic planktonic respiration phytoplankton production baseline respiration Science Q General. Including nature conservation geographical distribution QH1-199.5 |
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 |
Kevin Vikström Ines Bartl Jan Karlsson Johan Wikner |
author_facet |
Kevin Vikström Ines Bartl Jan Karlsson Johan Wikner |
author_sort |
Kevin Vikström |
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 |
Frontiers Media S.A. |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmars.2020.572070 https://doaj.org/article/86fe84b6053f43b384dc73699be99a36 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Phytoplankton |
genre_facet |
Arctic Phytoplankton |
op_source |
Frontiers in Marine Science, Vol 7 (2020) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2020.572070/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.572070 https://doaj.org/article/86fe84b6053f43b384dc73699be99a36 |
op_doi |
https://doi.org/10.3389/fmars.2020.572070 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
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1766342178215297024 |