Image_1_Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem.TIF
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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ftfrontimediafig:oai:figshare.com:article/13094468 2023-05-15T15:11:31+02:00 Image_1_Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem.TIF Kevin Vikström Ines Bartl Jan Karlsson Johan Wikner 2020-10-15T04:42:41Z https://doi.org/10.3389/fmars.2020.572070.s002 https://figshare.com/articles/figure/Image_1_Strong_Influence_of_Baseline_Respiration_in_an_Oligotrophic_Coastal_Ecosystem_TIF/13094468 unknown doi:10.3389/fmars.2020.572070.s002 https://figshare.com/articles/figure/Image_1_Strong_Influence_of_Baseline_Respiration_in_an_Oligotrophic_Coastal_Ecosystem_TIF/13094468 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering estuary oligotrophic planktonic respiration phytoplankton production baseline respiration allochthonous carbon nitrification Image Figure 2020 ftfrontimediafig https://doi.org/10.3389/fmars.2020.572070.s002 2020-10-21T22:57:50Z 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 O 2 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. Still Image Arctic Phytoplankton Frontiers: Figshare Arctic |
institution |
Open Polar |
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Frontiers: Figshare |
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ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering estuary oligotrophic planktonic respiration phytoplankton production baseline respiration allochthonous carbon nitrification |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering estuary oligotrophic planktonic respiration phytoplankton production baseline respiration allochthonous carbon nitrification Kevin Vikström Ines Bartl Jan Karlsson Johan Wikner Image_1_Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem.TIF |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering estuary oligotrophic planktonic respiration phytoplankton production baseline respiration allochthonous carbon nitrification |
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 O 2 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 |
Still Image |
author |
Kevin Vikström Ines Bartl Jan Karlsson Johan Wikner |
author_facet |
Kevin Vikström Ines Bartl Jan Karlsson Johan Wikner |
author_sort |
Kevin Vikström |
title |
Image_1_Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem.TIF |
title_short |
Image_1_Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem.TIF |
title_full |
Image_1_Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem.TIF |
title_fullStr |
Image_1_Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem.TIF |
title_full_unstemmed |
Image_1_Strong Influence of Baseline Respiration in an Oligotrophic Coastal Ecosystem.TIF |
title_sort |
image_1_strong influence of baseline respiration in an oligotrophic coastal ecosystem.tif |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmars.2020.572070.s002 https://figshare.com/articles/figure/Image_1_Strong_Influence_of_Baseline_Respiration_in_an_Oligotrophic_Coastal_Ecosystem_TIF/13094468 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Phytoplankton |
genre_facet |
Arctic Phytoplankton |
op_relation |
doi:10.3389/fmars.2020.572070.s002 https://figshare.com/articles/figure/Image_1_Strong_Influence_of_Baseline_Respiration_in_an_Oligotrophic_Coastal_Ecosystem_TIF/13094468 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2020.572070.s002 |
_version_ |
1766342365682860032 |