Oxygen and carbon fluxes from shallow unvegetated sediments in the Clarence Estuary, NSW, Australia under warming and ocean acidification conditions
Dissolved organic/inorganic carbon and oxygen fluxes from whole sediment core incubations subject to temperature and ocean acidification manipulations. Estuaries make a disproportionately large contribution of dissolved organic carbon (DOC) to the global carbon cycle, but it is unknown how this will...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.924460 2024-09-15T18:27:43+00:00 Oxygen and carbon fluxes from shallow unvegetated sediments in the Clarence Estuary, NSW, Australia under warming and ocean acidification conditions Simone, Michelle Schulz, Kai Oakes, Joanne Eyre, Bradley D LATITUDE: -29.403500 * LONGITUDE: 153.324000 2020 text/tab-separated-values, 1053 data points https://doi.pangaea.de/10.1594/PANGAEA.924460 https://doi.org/10.1594/PANGAEA.924460 en eng PANGAEA Simone, Michelle; Schulz, Kai Georg; Oakes, Joanne; Eyre, Bradley D (2021): Warming and ocean acidification may decrease estuarine dissolved organic carbon export to the ocean. Biogeosciences, 18(5), 1823-1838, https://doi.org/10.5194/bg-18-1823-2021 https://doi.pangaea.de/10.1594/PANGAEA.924460 https://doi.org/10.1594/PANGAEA.924460 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess AIRICA analyzer (Miranda) Australia Carbon inorganic dissolved organic Clarence_Estuary DEPTH sediment/rock water estuaries EXP Experiment LDO-probe Ocean acidification Oxygen saturation pH pH probe Replicates Salinity SALINO Salinometer sediment Surface area Temperature Temperature sensor Time in minutes Time point descriptive TOC analyser Aurora 1030W Treatment Volume warming dataset 2020 ftpangaea https://doi.org/10.1594/PANGAEA.92446010.5194/bg-18-1823-2021 2024-07-24T02:31:34Z Dissolved organic/inorganic carbon and oxygen fluxes from whole sediment core incubations subject to temperature and ocean acidification manipulations. Estuaries make a disproportionately large contribution of dissolved organic carbon (DOC) to the global carbon cycle, but it is unknown how this will change under a future climate. As such, the response of DOC fluxes from microbially dominated unvegetated sediments to individual and combined future climate stressors of warming (from Δ-3 °C to Δ+5 °C on ambient mean temperatures) and ocean acidification (OA, ~2 times the current partial pressure of CO2, pCO2) was investigated ex situ. Warming alone increased sediment heterotrophy, resulting in a proportional increase in sediment DOC uptake, with sediments becoming net sinks of DOC (3.5 to 8.8 mmol-C m-2 d-1) at warmer temperatures (Δ+3 °C and Δ+5 °C, respectively). This temperature response changed under OA conditions, with sediments becoming more autotrophic and a greater sink of DOC (1 to 4 times greater than under current-pCO2). This response was attributed to the stimulation of heterotrophic bacteria with the autochthonous production of labile organic matter by microphytobenthos. Extrapolating these results to the global area of unvegetated subtidal estuarine sediments, the future climate of warming (Δ+3 °C) and OA may decrease the estuarine export of DOC by ~80 % (~150 Tg-C yr-1) and have a disproportionately large impact on the global DOC budget. Dataset Ocean acidification PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(153.324000,153.324000,-29.403500,-29.403500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AIRICA analyzer (Miranda) Australia Carbon inorganic dissolved organic Clarence_Estuary DEPTH sediment/rock water estuaries EXP Experiment LDO-probe Ocean acidification Oxygen saturation pH pH probe Replicates Salinity SALINO Salinometer sediment Surface area Temperature Temperature sensor Time in minutes Time point descriptive TOC analyser Aurora 1030W Treatment Volume warming |
spellingShingle |
AIRICA analyzer (Miranda) Australia Carbon inorganic dissolved organic Clarence_Estuary DEPTH sediment/rock water estuaries EXP Experiment LDO-probe Ocean acidification Oxygen saturation pH pH probe Replicates Salinity SALINO Salinometer sediment Surface area Temperature Temperature sensor Time in minutes Time point descriptive TOC analyser Aurora 1030W Treatment Volume warming Simone, Michelle Schulz, Kai Oakes, Joanne Eyre, Bradley D Oxygen and carbon fluxes from shallow unvegetated sediments in the Clarence Estuary, NSW, Australia under warming and ocean acidification conditions |
topic_facet |
AIRICA analyzer (Miranda) Australia Carbon inorganic dissolved organic Clarence_Estuary DEPTH sediment/rock water estuaries EXP Experiment LDO-probe Ocean acidification Oxygen saturation pH pH probe Replicates Salinity SALINO Salinometer sediment Surface area Temperature Temperature sensor Time in minutes Time point descriptive TOC analyser Aurora 1030W Treatment Volume warming |
description |
Dissolved organic/inorganic carbon and oxygen fluxes from whole sediment core incubations subject to temperature and ocean acidification manipulations. Estuaries make a disproportionately large contribution of dissolved organic carbon (DOC) to the global carbon cycle, but it is unknown how this will change under a future climate. As such, the response of DOC fluxes from microbially dominated unvegetated sediments to individual and combined future climate stressors of warming (from Δ-3 °C to Δ+5 °C on ambient mean temperatures) and ocean acidification (OA, ~2 times the current partial pressure of CO2, pCO2) was investigated ex situ. Warming alone increased sediment heterotrophy, resulting in a proportional increase in sediment DOC uptake, with sediments becoming net sinks of DOC (3.5 to 8.8 mmol-C m-2 d-1) at warmer temperatures (Δ+3 °C and Δ+5 °C, respectively). This temperature response changed under OA conditions, with sediments becoming more autotrophic and a greater sink of DOC (1 to 4 times greater than under current-pCO2). This response was attributed to the stimulation of heterotrophic bacteria with the autochthonous production of labile organic matter by microphytobenthos. Extrapolating these results to the global area of unvegetated subtidal estuarine sediments, the future climate of warming (Δ+3 °C) and OA may decrease the estuarine export of DOC by ~80 % (~150 Tg-C yr-1) and have a disproportionately large impact on the global DOC budget. |
format |
Dataset |
author |
Simone, Michelle Schulz, Kai Oakes, Joanne Eyre, Bradley D |
author_facet |
Simone, Michelle Schulz, Kai Oakes, Joanne Eyre, Bradley D |
author_sort |
Simone, Michelle |
title |
Oxygen and carbon fluxes from shallow unvegetated sediments in the Clarence Estuary, NSW, Australia under warming and ocean acidification conditions |
title_short |
Oxygen and carbon fluxes from shallow unvegetated sediments in the Clarence Estuary, NSW, Australia under warming and ocean acidification conditions |
title_full |
Oxygen and carbon fluxes from shallow unvegetated sediments in the Clarence Estuary, NSW, Australia under warming and ocean acidification conditions |
title_fullStr |
Oxygen and carbon fluxes from shallow unvegetated sediments in the Clarence Estuary, NSW, Australia under warming and ocean acidification conditions |
title_full_unstemmed |
Oxygen and carbon fluxes from shallow unvegetated sediments in the Clarence Estuary, NSW, Australia under warming and ocean acidification conditions |
title_sort |
oxygen and carbon fluxes from shallow unvegetated sediments in the clarence estuary, nsw, australia under warming and ocean acidification conditions |
publisher |
PANGAEA |
publishDate |
2020 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.924460 https://doi.org/10.1594/PANGAEA.924460 |
op_coverage |
LATITUDE: -29.403500 * LONGITUDE: 153.324000 |
long_lat |
ENVELOPE(153.324000,153.324000,-29.403500,-29.403500) |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
Simone, Michelle; Schulz, Kai Georg; Oakes, Joanne; Eyre, Bradley D (2021): Warming and ocean acidification may decrease estuarine dissolved organic carbon export to the ocean. Biogeosciences, 18(5), 1823-1838, https://doi.org/10.5194/bg-18-1823-2021 https://doi.pangaea.de/10.1594/PANGAEA.924460 https://doi.org/10.1594/PANGAEA.924460 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.92446010.5194/bg-18-1823-2021 |
_version_ |
1810468966709067776 |