Near-shore Antarctic pH variability has implications for the design of ocean acidification experiments
Understanding how declining seawater pH caused by anthropogenic carbon emissions, or ocean acidification, impacts Southern Ocean biota is limited by a paucity of pH time-series. Here, we present the first high-frequency in-situ pH time-series in near-shore Antarctica from spring to winter under annu...
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:357231 2023-05-15T13:39:41+02:00 Near-shore Antarctic pH variability has implications for the design of ocean acidification experiments Hofmann, Gretchen Kelley, Amanda L. Shaw, Emily C. Martz, Todd R. Hofmann, Gretchen E. 2015-04-09 https://espace.library.uq.edu.au/view/UQ:357231/UQ357231_OA.pdf https://espace.library.uq.edu.au/view/UQ:357231 eng eng Nature Publishing Group doi:10.1038/srep09638 issn:2045-2322 Animal physiology Projection and prediction Marine Chemistry 1000 General Journal Article 2015 ftunivqespace https://doi.org/10.1038/srep09638 2020-10-12T23:44:26Z Understanding how declining seawater pH caused by anthropogenic carbon emissions, or ocean acidification, impacts Southern Ocean biota is limited by a paucity of pH time-series. Here, we present the first high-frequency in-situ pH time-series in near-shore Antarctica from spring to winter under annual sea ice. Observations from autonomous pH sensors revealed a seasonal increase of 0.3 pH units. The summer season was marked by an increase in temporal pH variability relative to spring and early winter, matching coastal pH variability observed at lower latitudes. Using our data, simulations of ocean acidification show a future period of deleterious wintertime pH levels potentially expanding to 7-11 months annually by 2100. Given the presence of (sub)seasonal pH variability, Antarctica marine species have an existing physiological tolerance of temporal pH change that may influence adaptation to future acidification. Yet, pH-induced ecosystem changes remain difficult to characterize in the absence of sufficient physiological data on present-day tolerances. It is therefore essential to incorporate natural and projected temporal pH variability in the design of experiments intended to study ocean acidification biology. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ocean acidification Sea ice Southern Ocean The University of Queensland: UQ eSpace Antarctic Southern Ocean Scientific Reports 5 1 |
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The University of Queensland: UQ eSpace |
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language |
English |
topic |
Animal physiology Projection and prediction Marine Chemistry 1000 General |
spellingShingle |
Animal physiology Projection and prediction Marine Chemistry 1000 General Hofmann, Gretchen Kelley, Amanda L. Shaw, Emily C. Martz, Todd R. Hofmann, Gretchen E. Near-shore Antarctic pH variability has implications for the design of ocean acidification experiments |
topic_facet |
Animal physiology Projection and prediction Marine Chemistry 1000 General |
description |
Understanding how declining seawater pH caused by anthropogenic carbon emissions, or ocean acidification, impacts Southern Ocean biota is limited by a paucity of pH time-series. Here, we present the first high-frequency in-situ pH time-series in near-shore Antarctica from spring to winter under annual sea ice. Observations from autonomous pH sensors revealed a seasonal increase of 0.3 pH units. The summer season was marked by an increase in temporal pH variability relative to spring and early winter, matching coastal pH variability observed at lower latitudes. Using our data, simulations of ocean acidification show a future period of deleterious wintertime pH levels potentially expanding to 7-11 months annually by 2100. Given the presence of (sub)seasonal pH variability, Antarctica marine species have an existing physiological tolerance of temporal pH change that may influence adaptation to future acidification. Yet, pH-induced ecosystem changes remain difficult to characterize in the absence of sufficient physiological data on present-day tolerances. It is therefore essential to incorporate natural and projected temporal pH variability in the design of experiments intended to study ocean acidification biology. |
format |
Article in Journal/Newspaper |
author |
Hofmann, Gretchen Kelley, Amanda L. Shaw, Emily C. Martz, Todd R. Hofmann, Gretchen E. |
author_facet |
Hofmann, Gretchen Kelley, Amanda L. Shaw, Emily C. Martz, Todd R. Hofmann, Gretchen E. |
author_sort |
Hofmann, Gretchen |
title |
Near-shore Antarctic pH variability has implications for the design of ocean acidification experiments |
title_short |
Near-shore Antarctic pH variability has implications for the design of ocean acidification experiments |
title_full |
Near-shore Antarctic pH variability has implications for the design of ocean acidification experiments |
title_fullStr |
Near-shore Antarctic pH variability has implications for the design of ocean acidification experiments |
title_full_unstemmed |
Near-shore Antarctic pH variability has implications for the design of ocean acidification experiments |
title_sort |
near-shore antarctic ph variability has implications for the design of ocean acidification experiments |
publisher |
Nature Publishing Group |
publishDate |
2015 |
url |
https://espace.library.uq.edu.au/view/UQ:357231/UQ357231_OA.pdf https://espace.library.uq.edu.au/view/UQ:357231 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Ocean acidification Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ocean acidification Sea ice Southern Ocean |
op_relation |
doi:10.1038/srep09638 issn:2045-2322 |
op_doi |
https://doi.org/10.1038/srep09638 |
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Scientific Reports |
container_volume |
5 |
container_issue |
1 |
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1766122191531802624 |