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Clumped isotopic compositions of cultured and natural land-snail shells and their implications

Dong, Jibao and Eiler, John and An, Zhisheng and Li, Xiangzhong and Liu, Weiguo and Hu, Jing (2021) Clumped isotopic compositions of cultured and natural land-snail shells and their implications. Palaeogeography, Palaeoclimatology, Palaeoecology, 577 . Art. No. 110530. ISSN 0031-0182. doi:10.1016/j.palaeo.2021.110530.

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Land snails are widely distributed animals whose clumped isotope (∆₄₇) in shell carbonates can serve as a proxy for temperature in terrestrial environments. However, it is unclear whether the ∆₄₇ values of snail shells are affected by biological processes known as “vital effects.” Here, we report ∆₄₇ values of whole Achatina fulica snail shells cultured at different temperatures at different growth ages (samples collected monthly). In general, the mean ∆₄₇ values of the snail shells decrease with higher cultivation temperature, which indicates they have potential use in reconstructing temperature changes. However, the mean reconstructed ∆₄₇ temperatures (T₄₇) using the calibrations from Petersen et al. (2019), Bonifacie et al. (2017), and Kelson et al. (2017) are ~6 °C higher than the actual growth temperatures. Interestingly, this overestimation in T₄₇ disappears when applying Zhai et al.'s (2019) calibration for the Bradybaena snail. This calibration also yields good agreement between the T₄₇ data of all field-collected snails and their growing season temperatures. The above-mentioned phenomenon indicates the existence of the vital effect in land-snail shells. The variations in ∆₄₇ with snail age and the correlations between ∆₄₇, δ¹⁸O, and δ¹³C values also indicate the potential influence of vital effects. Finally, we suggest that the vital effect may be explained by kinetic fractionation through CO₂ degassing associated with dehydration/dehydroxylation during the formation of snail shells.

Item Type:Article
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URLURL TypeDescription
Eiler, John0000-0001-5768-7593
Liu, Weiguo0000-0001-7081-9618
Additional Information:© 2021 Elsevier B.V. Received 24 November 2020, Revised 14 June 2021, Accepted 15 June 2021, Available online 22 June 2021. This study is supported by grants from National Natural Science Foundation of China, State Key Laboratory of Loess and Quaternary Geology, Institute of Earth and Environment, Chinese Academy of Sciences and the Second Tibetan Plateau Scientific Expedition and Research program (Grant Nos. XDB40000000, 41302152, SKLLQGPY1703, QYZDY-SSW-DQC001, ZDBS-SSW-DQC001 and 2019QZKK0101, respectively). The authors thank Nami Kitchen and Ryb Uri for their help during the measurements, and Ryb Uri and Dr. Max Lloyd are thanked for their assistance with data processing and discussion. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Funding AgencyGrant Number
State Key Laboratory of Loess and Quaternary GeologyUNSPECIFIED
Chinese Academy of SciencesXDB40000000
National Natural Science Foundation of China41302152
Chinese Academy of SciencesSKLLQGPY1703
Chinese Academy of SciencesQYZDY-SSW-DQC001
Chinese Academy of SciencesZDBS-SSW-DQC001
Second Tibetan Plateau Scientific Expedition and Research Program2019QZKK0101
Subject Keywords:Vital effect; Dehydration/dehydroxylation; Growth season; Temperature; Achatina fulica
Record Number:CaltechAUTHORS:20210629-223213618
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Official Citation:Jibao Dong, John Eiler, Zhisheng An, Xiangzhong Li, Weiguo Liu, Jing Hu, Clumped isotopic compositions of cultured and natural land-snail shells and their implications, Palaeogeography, Palaeoclimatology, Palaeoecology, Volume 577, 2021, 110530, ISSN 0031-0182, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109663
Deposited By: Tony Diaz
Deposited On:30 Jun 2021 22:40
Last Modified:30 Jun 2021 22:40

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