Abstract
In this study, Little Tern (Sternula albifrons) populations in Taiwan are examined based on two different types of data: mitochondrial control region DNA sequences and double digest restriction-site associated DNA (ddRAD) sequencing data. Feather samples were collected from 59 chicks across four known breeding colonies located on the eastern (Yilan and Hualien) and western (Penghu and Changhua) coasts of Taiwan. The results obtained are consistent in analyses and do not cluster into two geographical groups with respect to the eastern and western Taiwan. Furthermore, AMOVA analyses and pairwise ΦST/FST estimations based on both types of data reveal little to no differentiation among populations and between groups. The findings of this study suggest high population connectivity among Taiwan’s breeding colonies. Additionally, control region sequences of Taiwan’s Little Terns are compiled with those from Japan deposited in GenBank to compare genetic diversity and examine for phylogeographic breaks that could shape the diversity pattern of the species in eastern Asia. The resulting haplotype network does not clearly separate Taiwanese and Japanese populations, but the three most common haplotypes are prevalent for mainland Japan, Okinawa, and Taiwan. Little Tern populations may be frequently connected, but with some restrictions on gene flow causing moderate to great differentiation among the three. This is further supported by AMOVA analyses, pairwise ΦST estimations, and pattern of positive yet significant isolation by distance.
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Data availability
All mtDNA sequence data are deposited at NCBI GenBank under the following accession numbers: COI: OQ891693-OQ891743, and control region: OQ920922-OQ920978. ddRAD raw data are uploaded to the NCBI sequence read archive (SRA) under accession numbers SAMN34894844-SAMN34894893. There are no restrictions on data availability.
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Acknowledgements
We thank the current and previous members from the Marine Biodiversity and Phylogenomics lab for help with molecular data collection and analysis during this study. We greatly appreciate Prof. Yu-Sheng Huang (National Penghu University of Science and Technology), committees of the Yilan and Hualien Bird Societies, and members (specially, Wei-Ting Chen) of Prof. Hsiao-Wei Yuan’s lab for help on the sampling permit application and field work. We are grateful to the MSK’s thesis committee members, Yu-Cheng Hsu (National Dong Hwa University), Si-Min Lin (National Taiwan Normal University), and Tzung-Su Ding (National Taiwan University), and the English editor, Buford Pruitt (wildlife biologist in US) for helpful comments and discussions on this work.
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This project was supported by the National Science and Technology Council of Taiwan (NSTC110-2119-M-002-011 to WJC).
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Kong, M.S., Hung, CH., Hsu, LL. et al. Exploring genetic diversity and population structure of the Little Tern (Sternula albifrons) in Taiwan based on mtDNA and ddRAD sequencing data. Conserv Genet 25, 375–392 (2024). https://doi.org/10.1007/s10592-023-01574-7
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DOI: https://doi.org/10.1007/s10592-023-01574-7