Articles | Volume 18, issue 22
https://doi.org/10.5194/bg-18-5929-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-18-5929-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
22 Nov 2021
Research article |
| 22 Nov 2021
| 22 Nov 2021
Pyrite-lined shells as indicators of inefficient bioirrigation in the Holocene–Anthropocene stratigraphic record
Adam Tomašových
CORRESPONDING AUTHOR
Earth Science Institute, Slovak Academy of Sciences, Bratislava,
84005, Slovakia
Michaela Berensmeier
Department of Palaeontology, University of Vienna, Althanstrasse 14,
1090 Vienna, Austria
Ivo Gallmetzer
Department of Palaeontology, University of Vienna, Althanstrasse 14,
1090 Vienna, Austria
Alexandra Haselmair
Department of Palaeontology, University of Vienna, Althanstrasse 14,
1090 Vienna, Austria
Martin Zuschin
Department of Palaeontology, University of Vienna, Althanstrasse 14,
1090 Vienna, Austria
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Short summary
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The youngest fossil record is a crucial source of data on the history of marine ecosystems and their long-term alteration by humans. However, human activities that reshape ecosystems also alter sedimentary and biological processes that control the formation of the geological archives recording those impacts. Thus, humans have been transforming the marine fossil record in ways that affect our ability to reconstruct past ecological and climate dynamics.
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Biogeosciences, 21, 2177–2188, https://doi.org/10.5194/bg-21-2177-2024, https://doi.org/10.5194/bg-21-2177-2024, 2024
Short summary
Short summary
The youngest fossil record is a crucial source of data on the history of marine ecosystems and their long-term alteration by humans. However, human activities that reshape ecosystems also alter sedimentary and biological processes that control the formation of the geological archives recording those impacts. Thus, humans have been transforming the marine fossil record in ways that affect our ability to reconstruct past ecological and climate dynamics.
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Short summary
The timescale of mixing and irrigation of sediments by burrowers that affect biogeochemical cycles is difficult to estimate in the stratigraphic record. We show that pyrite linings in molluscan shells preserved below the mixed layer represent a signature of limited bioirrigation. We document an increase in the frequency of pyrite-lined shells in cores collected in the northern Adriatic Sea, suggesting that bioirrigation rates significantly declined during the late 20th century.
The timescale of mixing and irrigation of sediments by burrowers that affect biogeochemical...
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