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The impact of ocean acidification on gastropod shell dissolution and microstructure
ID：34 View Protection：ATTENDEE Updated Time：2025-05-21 16:49:39 Hits：166 Oral Presentation

Start Time：Pending（Asia/Shanghai）

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Abstract
Global seawater pH is projected to decrease by 0.3–0.5 units on average by the end of this century, which is
considered detrimental to the shells of marine calcareous organisms. However, there is limited understanding of
how ocean acidification affects the morphology and structure of these shells, as well as the underlying mecha
nisms. This study examines the shell growth, surface erosion, and microstructural changes of the marine
gastropod Lunella coronata granulata after 85 days of exposure to varying pH (8.1–7.1). The results reveal that at
pH ≤ 7.5, shell growth is notably inhibited, with pronounced dissolution hole formation on the inner surface. At
pH 7.1, shell surface erosion becomes more pronounced, accompanied by extensive peeling of the shell peri
ostracum. These changes—dissolution hole formation and periostracum peeling—are critical indicators of
gastropod shell response to ocean acidification and can serve as biological indicators reflecting current and past
ocean acidification. Additionally, our study shows a clear negative correlation between shell dissolution and pH,
providing new bio-proxy for indicating the pH changes.
Keywords
Reduced pH,Shell erosion,Aragonite and calcite,Calcium carbonate saturation
Speaker
幸 李
博士研究生在读 中国地质大学（武汉）

Submission Author
幸 李 中国地质大学（武汉）
海军 宋 中国地质大学（武汉）
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Important Date

  • Conference Date

    Jun 10

    2025

    to

    Jun 13

    2025

  • Apr 15 2025

    Draft paper submission deadline

Sponsored By
National Natural Science Foundation of China
Geobiology Society
National Committee of Stratigraphy of China
Ministry of Science and Technology
Geological Society of China
Paleontological Society of China
Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences (CAS)
Institute of Vertebrate Paleontology and Paleoanthropology, CAS
International Commission on Stratigraphy
International Paleontological Association
Organized By
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (CUG, Wuhan)
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