Ocean Acidification and the End-Permian Mass Extinction: To What Extent does Evidence Support Hypothesis?
Ocean acidification in modern oceans is linked to rapid increase in atmospheric CO2, raising concern about marine diversity, food security and ecosystem services. Proxy evidence for acidification during past crises may help predict future change, but three issues limit confidence of comparisons betw...
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ftmdpi:oai:mdpi.com:/2076-3263/2/4/221/ 2023-08-20T04:08:52+02:00 Ocean Acidification and the End-Permian Mass Extinction: To What Extent does Evidence Support Hypothesis? Stephen Kershaw Sylvie Crasquin Yue Li Pierre-Yves Collin Marie-Béatrice Forel agris 2012-09-28 application/pdf https://doi.org/10.3390/geosciences2040221 EN eng Molecular Diversity Preservation International Sedimentology, Stratigraphy and Palaeontology https://dx.doi.org/10.3390/geosciences2040221 https://creativecommons.org/licenses/by/3.0/ Geosciences; Volume 2; Issue 4; Pages: 221-234 ocean acidification end-Permian extinction microbialite ocean buffer stylolite Text 2012 ftmdpi https://doi.org/10.3390/geosciences2040221 2023-07-31T20:30:10Z Ocean acidification in modern oceans is linked to rapid increase in atmospheric CO2, raising concern about marine diversity, food security and ecosystem services. Proxy evidence for acidification during past crises may help predict future change, but three issues limit confidence of comparisons between modern and ancient ocean acidification, illustrated from the end-Permian extinction, 252 million years ago: (1) problems with evidence for ocean acidification preserved in sedimentary rocks, where proposed marine dissolution surfaces may be subaerial. Sedimentary evidence that the extinction was partly due to ocean acidification is therefore inconclusive; (2) Fossils of marine animals potentially affected by ocean acidification are imperfect records of past conditions; selective extinction of hypercalcifying organisms is uncertain evidence for acidification; (3) The current high rates of acidification may not reflect past rates, which cannot be measured directly, and whose temporal resolution decreases in older rocks. Thus large increases in CO2 in the past may have occurred over a long enough time to have allowed assimilation into the oceans, and acidification may not have stressed ocean biota to the present extent. Although we acknowledge the very likely occurrence of past ocean acidification, obtaining support presents a continuing challenge for the Earth science community. Text Ocean acidification MDPI Open Access Publishing Geosciences 2 4 221 234 |
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English |
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ocean acidification end-Permian extinction microbialite ocean buffer stylolite |
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ocean acidification end-Permian extinction microbialite ocean buffer stylolite Stephen Kershaw Sylvie Crasquin Yue Li Pierre-Yves Collin Marie-Béatrice Forel Ocean Acidification and the End-Permian Mass Extinction: To What Extent does Evidence Support Hypothesis? |
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ocean acidification end-Permian extinction microbialite ocean buffer stylolite |
description |
Ocean acidification in modern oceans is linked to rapid increase in atmospheric CO2, raising concern about marine diversity, food security and ecosystem services. Proxy evidence for acidification during past crises may help predict future change, but three issues limit confidence of comparisons between modern and ancient ocean acidification, illustrated from the end-Permian extinction, 252 million years ago: (1) problems with evidence for ocean acidification preserved in sedimentary rocks, where proposed marine dissolution surfaces may be subaerial. Sedimentary evidence that the extinction was partly due to ocean acidification is therefore inconclusive; (2) Fossils of marine animals potentially affected by ocean acidification are imperfect records of past conditions; selective extinction of hypercalcifying organisms is uncertain evidence for acidification; (3) The current high rates of acidification may not reflect past rates, which cannot be measured directly, and whose temporal resolution decreases in older rocks. Thus large increases in CO2 in the past may have occurred over a long enough time to have allowed assimilation into the oceans, and acidification may not have stressed ocean biota to the present extent. Although we acknowledge the very likely occurrence of past ocean acidification, obtaining support presents a continuing challenge for the Earth science community. |
format |
Text |
author |
Stephen Kershaw Sylvie Crasquin Yue Li Pierre-Yves Collin Marie-Béatrice Forel |
author_facet |
Stephen Kershaw Sylvie Crasquin Yue Li Pierre-Yves Collin Marie-Béatrice Forel |
author_sort |
Stephen Kershaw |
title |
Ocean Acidification and the End-Permian Mass Extinction: To What Extent does Evidence Support Hypothesis? |
title_short |
Ocean Acidification and the End-Permian Mass Extinction: To What Extent does Evidence Support Hypothesis? |
title_full |
Ocean Acidification and the End-Permian Mass Extinction: To What Extent does Evidence Support Hypothesis? |
title_fullStr |
Ocean Acidification and the End-Permian Mass Extinction: To What Extent does Evidence Support Hypothesis? |
title_full_unstemmed |
Ocean Acidification and the End-Permian Mass Extinction: To What Extent does Evidence Support Hypothesis? |
title_sort |
ocean acidification and the end-permian mass extinction: to what extent does evidence support hypothesis? |
publisher |
Molecular Diversity Preservation International |
publishDate |
2012 |
url |
https://doi.org/10.3390/geosciences2040221 |
op_coverage |
agris |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Geosciences; Volume 2; Issue 4; Pages: 221-234 |
op_relation |
Sedimentology, Stratigraphy and Palaeontology https://dx.doi.org/10.3390/geosciences2040221 |
op_rights |
https://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.3390/geosciences2040221 |
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Geosciences |
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2 |
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4 |
container_start_page |
221 |
op_container_end_page |
234 |
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