Future ocean acidification will be amplified by hypoxia in coastal habitats
Ocean acidification is elicited by anthropogenic carbon dioxide emissions and resulting oceanic uptake of excess CO2 and might constitute an abiotic stressor powerful enough to alter marine ecosystem structures. For surface waters in gas-exchange equilibrium with the atmosphere, models suggest incre...
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Online Access: | https://oceanrep.geomar.de/id/eprint/21577/ https://oceanrep.geomar.de/id/eprint/21577/1/melzner%20et%20al%202013.pdf https://doi.org/10.1007/s00227-012-1954-1 |
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ftoceanrep:oai:oceanrep.geomar.de:21577 2023-05-15T17:49:57+02:00 Future ocean acidification will be amplified by hypoxia in coastal habitats Melzner, Frank Thomsen, Jörn Koeve, Wolfgang Oschlies, Andreas Gutowska, Magdalena Bange, Hermann W. Hansen, Hans Peter Körtzinger, Arne 2013 text https://oceanrep.geomar.de/id/eprint/21577/ https://oceanrep.geomar.de/id/eprint/21577/1/melzner%20et%20al%202013.pdf https://doi.org/10.1007/s00227-012-1954-1 en eng Springer https://oceanrep.geomar.de/id/eprint/21577/1/melzner%20et%20al%202013.pdf Melzner, F., Thomsen, J., Koeve, W. , Oschlies, A. , Gutowska, M., Bange, H. W. , Hansen, H. P. and Körtzinger, A. (2013) Future ocean acidification will be amplified by hypoxia in coastal habitats. Marine Biology, 160 . pp. 1875-1888. DOI 10.1007/s00227-012-1954-1 <https://doi.org/10.1007/s00227-012-1954-1>. doi:10.1007/s00227-012-1954-1 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2013 ftoceanrep https://doi.org/10.1007/s00227-012-1954-1 2023-04-07T15:09:49Z Ocean acidification is elicited by anthropogenic carbon dioxide emissions and resulting oceanic uptake of excess CO2 and might constitute an abiotic stressor powerful enough to alter marine ecosystem structures. For surface waters in gas-exchange equilibrium with the atmosphere, models suggest increases in CO2 partial pressure (pCO2) from current values of ca. 390 μatm to ca. 700–1,000 μatm by the end of the century. However, in typically unequilibrated coastal hypoxic regions, much higher pCO2 values can be expected, as heterotrophic degradation of organic material is necessarily related to the production of CO2 (i.e., dissolved inorganic carbon). Here, we provide data and estimates that, even under current conditions, maximum pCO2 values of 1,700–3,200 μatm can easily be reached when all oxygen is consumed at salinities between 35 and 20, respectively. Due to the nonlinear nature of the carbonate system, the approximate doubling of seawater pCO2 in surface waters due to ocean acidification will most strongly affect coastal hypoxic zones as pCO2 during hypoxia will increase proportionally: we calculate maximum pCO2 values of ca. 4,500 μatm at a salinity of 20 (T = 10 °C) and ca. 3,400 μatm at a salinity of 35 (T = 10 °C) when all oxygen is consumed. Upwelling processes can bring these CO2-enriched waters in contact with shallow water ecosystems and may then affect species performance there as well. We conclude that (1) combined stressor experiments (pCO2 and pO2) are largely missing at the moment and that (2) coastal ocean acidification experimental designs need to be closely adjusted to carbonate system variability within the specific habitat. In general, the worldwide spread of coastal hypoxic zones also simultaneously is a spread of CO2-enriched zones. The magnitude of expected changes in pCO2 in these regions indicates that coastal systems may be more endangered by future global climate change than previously thought. Article in Journal/Newspaper Ocean acidification OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Marine Biology 160 8 1875 1888 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Ocean acidification is elicited by anthropogenic carbon dioxide emissions and resulting oceanic uptake of excess CO2 and might constitute an abiotic stressor powerful enough to alter marine ecosystem structures. For surface waters in gas-exchange equilibrium with the atmosphere, models suggest increases in CO2 partial pressure (pCO2) from current values of ca. 390 μatm to ca. 700–1,000 μatm by the end of the century. However, in typically unequilibrated coastal hypoxic regions, much higher pCO2 values can be expected, as heterotrophic degradation of organic material is necessarily related to the production of CO2 (i.e., dissolved inorganic carbon). Here, we provide data and estimates that, even under current conditions, maximum pCO2 values of 1,700–3,200 μatm can easily be reached when all oxygen is consumed at salinities between 35 and 20, respectively. Due to the nonlinear nature of the carbonate system, the approximate doubling of seawater pCO2 in surface waters due to ocean acidification will most strongly affect coastal hypoxic zones as pCO2 during hypoxia will increase proportionally: we calculate maximum pCO2 values of ca. 4,500 μatm at a salinity of 20 (T = 10 °C) and ca. 3,400 μatm at a salinity of 35 (T = 10 °C) when all oxygen is consumed. Upwelling processes can bring these CO2-enriched waters in contact with shallow water ecosystems and may then affect species performance there as well. We conclude that (1) combined stressor experiments (pCO2 and pO2) are largely missing at the moment and that (2) coastal ocean acidification experimental designs need to be closely adjusted to carbonate system variability within the specific habitat. In general, the worldwide spread of coastal hypoxic zones also simultaneously is a spread of CO2-enriched zones. The magnitude of expected changes in pCO2 in these regions indicates that coastal systems may be more endangered by future global climate change than previously thought. |
format |
Article in Journal/Newspaper |
author |
Melzner, Frank Thomsen, Jörn Koeve, Wolfgang Oschlies, Andreas Gutowska, Magdalena Bange, Hermann W. Hansen, Hans Peter Körtzinger, Arne |
spellingShingle |
Melzner, Frank Thomsen, Jörn Koeve, Wolfgang Oschlies, Andreas Gutowska, Magdalena Bange, Hermann W. Hansen, Hans Peter Körtzinger, Arne Future ocean acidification will be amplified by hypoxia in coastal habitats |
author_facet |
Melzner, Frank Thomsen, Jörn Koeve, Wolfgang Oschlies, Andreas Gutowska, Magdalena Bange, Hermann W. Hansen, Hans Peter Körtzinger, Arne |
author_sort |
Melzner, Frank |
title |
Future ocean acidification will be amplified by hypoxia in coastal habitats |
title_short |
Future ocean acidification will be amplified by hypoxia in coastal habitats |
title_full |
Future ocean acidification will be amplified by hypoxia in coastal habitats |
title_fullStr |
Future ocean acidification will be amplified by hypoxia in coastal habitats |
title_full_unstemmed |
Future ocean acidification will be amplified by hypoxia in coastal habitats |
title_sort |
future ocean acidification will be amplified by hypoxia in coastal habitats |
publisher |
Springer |
publishDate |
2013 |
url |
https://oceanrep.geomar.de/id/eprint/21577/ https://oceanrep.geomar.de/id/eprint/21577/1/melzner%20et%20al%202013.pdf https://doi.org/10.1007/s00227-012-1954-1 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://oceanrep.geomar.de/id/eprint/21577/1/melzner%20et%20al%202013.pdf Melzner, F., Thomsen, J., Koeve, W. , Oschlies, A. , Gutowska, M., Bange, H. W. , Hansen, H. P. and Körtzinger, A. (2013) Future ocean acidification will be amplified by hypoxia in coastal habitats. Marine Biology, 160 . pp. 1875-1888. DOI 10.1007/s00227-012-1954-1 <https://doi.org/10.1007/s00227-012-1954-1>. doi:10.1007/s00227-012-1954-1 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s00227-012-1954-1 |
container_title |
Marine Biology |
container_volume |
160 |
container_issue |
8 |
container_start_page |
1875 |
op_container_end_page |
1888 |
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1766156490656186368 |