Data_Sheet_1_The Sensitivity of Subsurface Microbes to Ocean Warming Accentuates Future Declines in Particulate Carbon Export.pdf
Under future warming Earth System Models (ESMs) project a decrease in the magnitude of downward particulate organic carbon (POC) export, suggesting the potential for carbon storage in the deep ocean will be reduced. Projections of POC export can also be quantified using an alternative physiologicall...
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ftfrontimediafig:oai:figshare.com:article/7552787 2023-05-15T18:25:56+02:00 Data_Sheet_1_The Sensitivity of Subsurface Microbes to Ocean Warming Accentuates Future Declines in Particulate Carbon Export.pdf Emma Louise Cavan Stephanie A. Henson Philip W. Boyd 2019-01-07T04:37:10Z https://doi.org/10.3389/fevo.2018.00230.s001 https://figshare.com/articles/Data_Sheet_1_The_Sensitivity_of_Subsurface_Microbes_to_Ocean_Warming_Accentuates_Future_Declines_in_Particulate_Carbon_Export_pdf/7552787 unknown doi:10.3389/fevo.2018.00230.s001 https://figshare.com/articles/Data_Sheet_1_The_Sensitivity_of_Subsurface_Microbes_to_Ocean_Warming_Accentuates_Future_Declines_in_Particulate_Carbon_Export_pdf/7552787 CC BY 4.0 CC-BY Evolutionary Biology Ecology Invasive Species Ecology Landscape Ecology Conservation and Biodiversity Behavioural Ecology Community Ecology (excl. Invasive Species Ecology) Ecological Physiology Freshwater Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Population Ecology Terrestrial Ecology particulate carbon export microbes warming metabolic theory activation energy Dataset 2019 ftfrontimediafig https://doi.org/10.3389/fevo.2018.00230.s001 2019-01-09T23:58:56Z Under future warming Earth System Models (ESMs) project a decrease in the magnitude of downward particulate organic carbon (POC) export, suggesting the potential for carbon storage in the deep ocean will be reduced. Projections of POC export can also be quantified using an alternative physiologically-based approach, the Metabolic Theory of Ecology (MTE). MTE employs an activation energy (E a ) describing organismal metabolic sensitivity to temperature change, but does not consider changes in ocean chemistry or physics. Many ESMs incorporate temperature dependent functions, where rates (e.g., respiration) scale with temperature. Temperature sensitivity describes how temperature dependence varies across metabolic rates or species. ESMs acknowledge temperature sensitivity between rates (e.g., between heterotrophic and autotropic processes), but due to a lack of empirical data cannot parameterize for variation within rates, such as differences within species or biogeochemical provinces. Here we investigate how varying temperature sensitivity affects heterotrophic microbial respiration and hence future POC export. Using satellite-derived data and ESM temperature projections we applied microbial MTE, with varying temperature sensitivity, to estimates of global POC export. In line with observations from polar regions and the deep ocean we imposed an elevated temperature sensitivity (E a = 1.0 eV) to cooler regions; firstly to the Southern Ocean (south of 40°S) and secondly where temperature at 100 m depth <13°C. Elsewhere in both these scenarios E a was set to 0.7 eV (moderate sensitivity/classic MTE). Imposing high temperature sensitivity in cool regions resulted in projected declines in export of 17 ± 1% (< 40°S) and 23 ± 1% (< 13°C) by 2100 relative to the present day. Hence varying microbial temperature sensitivity resulted in at least 2-fold greater declines in POC export than suggested by classic MTE derived in this study (12 ± 1%, E a = 0.7 eV globally) or ESMs (1–12%). The sparse observational data ... Dataset Southern Ocean Frontiers: Figshare Southern Ocean |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Evolutionary Biology Ecology Invasive Species Ecology Landscape Ecology Conservation and Biodiversity Behavioural Ecology Community Ecology (excl. Invasive Species Ecology) Ecological Physiology Freshwater Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Population Ecology Terrestrial Ecology particulate carbon export microbes warming metabolic theory activation energy |
spellingShingle |
Evolutionary Biology Ecology Invasive Species Ecology Landscape Ecology Conservation and Biodiversity Behavioural Ecology Community Ecology (excl. Invasive Species Ecology) Ecological Physiology Freshwater Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Population Ecology Terrestrial Ecology particulate carbon export microbes warming metabolic theory activation energy Emma Louise Cavan Stephanie A. Henson Philip W. Boyd Data_Sheet_1_The Sensitivity of Subsurface Microbes to Ocean Warming Accentuates Future Declines in Particulate Carbon Export.pdf |
topic_facet |
Evolutionary Biology Ecology Invasive Species Ecology Landscape Ecology Conservation and Biodiversity Behavioural Ecology Community Ecology (excl. Invasive Species Ecology) Ecological Physiology Freshwater Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Population Ecology Terrestrial Ecology particulate carbon export microbes warming metabolic theory activation energy |
description |
Under future warming Earth System Models (ESMs) project a decrease in the magnitude of downward particulate organic carbon (POC) export, suggesting the potential for carbon storage in the deep ocean will be reduced. Projections of POC export can also be quantified using an alternative physiologically-based approach, the Metabolic Theory of Ecology (MTE). MTE employs an activation energy (E a ) describing organismal metabolic sensitivity to temperature change, but does not consider changes in ocean chemistry or physics. Many ESMs incorporate temperature dependent functions, where rates (e.g., respiration) scale with temperature. Temperature sensitivity describes how temperature dependence varies across metabolic rates or species. ESMs acknowledge temperature sensitivity between rates (e.g., between heterotrophic and autotropic processes), but due to a lack of empirical data cannot parameterize for variation within rates, such as differences within species or biogeochemical provinces. Here we investigate how varying temperature sensitivity affects heterotrophic microbial respiration and hence future POC export. Using satellite-derived data and ESM temperature projections we applied microbial MTE, with varying temperature sensitivity, to estimates of global POC export. In line with observations from polar regions and the deep ocean we imposed an elevated temperature sensitivity (E a = 1.0 eV) to cooler regions; firstly to the Southern Ocean (south of 40°S) and secondly where temperature at 100 m depth <13°C. Elsewhere in both these scenarios E a was set to 0.7 eV (moderate sensitivity/classic MTE). Imposing high temperature sensitivity in cool regions resulted in projected declines in export of 17 ± 1% (< 40°S) and 23 ± 1% (< 13°C) by 2100 relative to the present day. Hence varying microbial temperature sensitivity resulted in at least 2-fold greater declines in POC export than suggested by classic MTE derived in this study (12 ± 1%, E a = 0.7 eV globally) or ESMs (1–12%). The sparse observational data ... |
format |
Dataset |
author |
Emma Louise Cavan Stephanie A. Henson Philip W. Boyd |
author_facet |
Emma Louise Cavan Stephanie A. Henson Philip W. Boyd |
author_sort |
Emma Louise Cavan |
title |
Data_Sheet_1_The Sensitivity of Subsurface Microbes to Ocean Warming Accentuates Future Declines in Particulate Carbon Export.pdf |
title_short |
Data_Sheet_1_The Sensitivity of Subsurface Microbes to Ocean Warming Accentuates Future Declines in Particulate Carbon Export.pdf |
title_full |
Data_Sheet_1_The Sensitivity of Subsurface Microbes to Ocean Warming Accentuates Future Declines in Particulate Carbon Export.pdf |
title_fullStr |
Data_Sheet_1_The Sensitivity of Subsurface Microbes to Ocean Warming Accentuates Future Declines in Particulate Carbon Export.pdf |
title_full_unstemmed |
Data_Sheet_1_The Sensitivity of Subsurface Microbes to Ocean Warming Accentuates Future Declines in Particulate Carbon Export.pdf |
title_sort |
data_sheet_1_the sensitivity of subsurface microbes to ocean warming accentuates future declines in particulate carbon export.pdf |
publishDate |
2019 |
url |
https://doi.org/10.3389/fevo.2018.00230.s001 https://figshare.com/articles/Data_Sheet_1_The_Sensitivity_of_Subsurface_Microbes_to_Ocean_Warming_Accentuates_Future_Declines_in_Particulate_Carbon_Export_pdf/7552787 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
doi:10.3389/fevo.2018.00230.s001 https://figshare.com/articles/Data_Sheet_1_The_Sensitivity_of_Subsurface_Microbes_to_Ocean_Warming_Accentuates_Future_Declines_in_Particulate_Carbon_Export_pdf/7552787 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fevo.2018.00230.s001 |
_version_ |
1766207676305375232 |