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Reconsidering invasion history of common land snails in Japan through genome-wide analyses

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A Correction to this article was published on 24 August 2023

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Abstract

Understanding the method and history of introduction in non-native species are essential for conservation biology, especially in regions like Japan that have a long history of human activity. Bradybaena similaris is a circumtropical land snail that is considered a non-native species from Southeast Asia or East Asia to Japan, which was believed to be introduced by human activities such as sugarcane or sweet potato establishment several hundred years ago. Bradybaena pellucida, a sister species of B. similaris, is native to western Japan, but has recently spread throughout the eastern part of the country. We investigated genetic diversification pattern of non-native organisms using the two land snail species. We clarified the phylogenetic relationships of B. similaris and B. pellucida based on genome-wide SNPs and mtDNA. We revealed the population demographic history using ABC analysis with SNP data. Bradybaena similaris of mainland Japan could be distinguished from populations on the continent. Introgressive hybridization between the species occurred approximately 29,700 years ago. The present findings provide two new hypotheses: that agriculture began in Japan about 2800 years ago, Japanese populations of B. similaris were introduced from the continent more than 29,000 years ago by human activity other than agriculture; or B. similaris is native to a part of mainland Japan. The history of a non-native species with human activity is complex, urging us to reconsider previous hypotheses.

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Data availability

The data used for analyses and some results can be found in the online supporting information (Tables S1–S6 and Figs S1 and S2).

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Acknowledgements

We thank Fukuda H, Kameda Y, Miura O, Morii Y, Sato T, and Uchida S for sample collection.

Funding

This study was supported by research grants from the Japan Society for the Promotion of Science (JSPS) Research Fellow Grant Number 15J01258 (Takahiro Hirano), JSPS Grant‐in‐Aid for Scientific Research 20K15872 (Takahiro Hirano), and Frontier Research in Duo (FRiD) of Tohoku University (Takahiro Hirano).

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Contributions

HT conceived and designed the study with contribution from Chiba SHT coordinated the taxon sampling with major contribution from YD, ST, NH, YB, DZ, TDV, and HATS performed the field survey. HT conducted molecular experiment with major contributions from MA and SY. HT took the lead in analyzing the dataset and writing manuscript with major contributions from IS and SMP. All authors read, reviewed, edited and commented on the manuscript, and then approved the manuscript.

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Correspondence to Takahiro Hirano.

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The authors have no relevant financial or non-financial interests to disclose.

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The original online version of this article was revised due to the wrong Supplementary file 3 was originally published with this article; it has now been replaced with the correct file.

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Hirano, T., Yamazaki, D., Ito, S. et al. Reconsidering invasion history of common land snails in Japan through genome-wide analyses. Biol Invasions 25, 3535–3549 (2023). https://doi.org/10.1007/s10530-023-03123-2

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  • DOI: https://doi.org/10.1007/s10530-023-03123-2

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