{"title":"环极蛇鞘群遗传分化与种群结构的解析","authors":"Yi-Xuan Li, Sophia Nazarova, Jack Chi-Ho Ip, Evgeny Genelt-Yanovskiy, Ting Xu, Yue Dong, Jian-Wen Qiu, Xue-Lei Zhang, Qin-Zeng Xu","doi":"10.1111/jbi.15184","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> Aim</h3>\n \n <p>The presence of cryptic species causes significant challenges to biodiversity assessment and biological resources management. Here, we investigate the genetic structure and biogeographical patterns of a complex ophiuroid species as a case study.</p>\n </section>\n \n <section>\n \n <h3> Location</h3>\n \n <p>Yellow Sea and Funka Bay in the Western Pacific Ocean, Bering Sea in the Arctic Ocean and Barents Sea in the Atlantic Ocean.</p>\n </section>\n \n <section>\n \n <h3> Taxon</h3>\n \n <p>The circumpolar ophiuroid <i>Ophiura sarsii</i>, a common benthic species across the Arctic seas, has at least two cryptic lineages.</p>\n </section>\n \n <section>\n \n <h3> Methods</h3>\n \n <p>To better understand the genetic structures and the underlying evolutionary processes in the <i>O. sarsii</i> species complex, we compared the genome-wide single nucleotide polymorphism (SNP) data and <i>COI</i> of five geographical populations across the northern Pacific, Arctic and Atlantic Oceans using the 2b-RAD sequencing approach.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>Results clearly showed three highly diverged evolutionary lineages: northern Pacific lineage (<i>O. sarsii vadicola</i>), Pacific-Arctic lineage (<i>L</i><sub>A</sub>) and Atlantic lineage (<i>L</i><sub>B</sub>). The divMigrate analysis revealed significant gene flow within <i>O. sarsii vadicola</i> populations and <i>O. sarsii</i> L<sub>A</sub> populations, but no cross-species gene flow. Demographic analysis was used to estimate their historical divergence, in which the differentiation of <i>O. sarsii vadicola</i> predated that of the other two lineages of <i>O. sarsii</i>. Molecular dating resulted in an estimation of their divergence events between 3.88 and 1.67 Ma at Pliocene–Pleistocene using <i>COI</i>. Functional analysis revealed several enriched signalling pathways, potentially involved in ophiuroids' environmental adaptation.</p>\n </section>\n \n <section>\n \n <h3> Main Conclusions</h3>\n \n <p>Our study suggests three lineages of the cryptic species <i>O. sarsii</i> could split into at least two genetic species, including <i>O. sarsii vadicola</i>, North Pacific–Arctic and Atlantic <i>O. sarsii</i>. The hidden evolutionary trajectory is uncovered for the <i>O. sarsii</i> complex, shaped by paleoclimate and ocean currents. We emphasise the need for genome-wide SNP applications to understand the ophiuroid biodiversity and contribute to conservation in the Pacific–Arctic region.</p>\n </section>\n </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 10","pages":""},"PeriodicalIF":3.6000,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Resolving the Genetic Divergence and Population Structure in the Circumpolar Ophiuroid Ophiura sarsii Complex\",\"authors\":\"Yi-Xuan Li, Sophia Nazarova, Jack Chi-Ho Ip, Evgeny Genelt-Yanovskiy, Ting Xu, Yue Dong, Jian-Wen Qiu, Xue-Lei Zhang, Qin-Zeng Xu\",\"doi\":\"10.1111/jbi.15184\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n \\n <section>\\n \\n <h3> Aim</h3>\\n \\n <p>The presence of cryptic species causes significant challenges to biodiversity assessment and biological resources management. Here, we investigate the genetic structure and biogeographical patterns of a complex ophiuroid species as a case study.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Location</h3>\\n \\n <p>Yellow Sea and Funka Bay in the Western Pacific Ocean, Bering Sea in the Arctic Ocean and Barents Sea in the Atlantic Ocean.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Taxon</h3>\\n \\n <p>The circumpolar ophiuroid <i>Ophiura sarsii</i>, a common benthic species across the Arctic seas, has at least two cryptic lineages.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Methods</h3>\\n \\n <p>To better understand the genetic structures and the underlying evolutionary processes in the <i>O. sarsii</i> species complex, we compared the genome-wide single nucleotide polymorphism (SNP) data and <i>COI</i> of five geographical populations across the northern Pacific, Arctic and Atlantic Oceans using the 2b-RAD sequencing approach.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Results</h3>\\n \\n <p>Results clearly showed three highly diverged evolutionary lineages: northern Pacific lineage (<i>O. sarsii vadicola</i>), Pacific-Arctic lineage (<i>L</i><sub>A</sub>) and Atlantic lineage (<i>L</i><sub>B</sub>). The divMigrate analysis revealed significant gene flow within <i>O. sarsii vadicola</i> populations and <i>O. sarsii</i> L<sub>A</sub> populations, but no cross-species gene flow. Demographic analysis was used to estimate their historical divergence, in which the differentiation of <i>O. sarsii vadicola</i> predated that of the other two lineages of <i>O. sarsii</i>. Molecular dating resulted in an estimation of their divergence events between 3.88 and 1.67 Ma at Pliocene–Pleistocene using <i>COI</i>. Functional analysis revealed several enriched signalling pathways, potentially involved in ophiuroids' environmental adaptation.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Main Conclusions</h3>\\n \\n <p>Our study suggests three lineages of the cryptic species <i>O. sarsii</i> could split into at least two genetic species, including <i>O. sarsii vadicola</i>, North Pacific–Arctic and Atlantic <i>O. sarsii</i>. The hidden evolutionary trajectory is uncovered for the <i>O. sarsii</i> complex, shaped by paleoclimate and ocean currents. We emphasise the need for genome-wide SNP applications to understand the ophiuroid biodiversity and contribute to conservation in the Pacific–Arctic region.</p>\\n </section>\\n </div>\",\"PeriodicalId\":15299,\"journal\":{\"name\":\"Journal of Biogeography\",\"volume\":\"52 10\",\"pages\":\"\"},\"PeriodicalIF\":3.6000,\"publicationDate\":\"2025-06-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Biogeography\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/jbi.15184\",\"RegionNum\":2,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ECOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Biogeography","FirstCategoryId":"93","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/jbi.15184","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ECOLOGY","Score":null,"Total":0}
Resolving the Genetic Divergence and Population Structure in the Circumpolar Ophiuroid Ophiura sarsii Complex
Aim
The presence of cryptic species causes significant challenges to biodiversity assessment and biological resources management. Here, we investigate the genetic structure and biogeographical patterns of a complex ophiuroid species as a case study.
Location
Yellow Sea and Funka Bay in the Western Pacific Ocean, Bering Sea in the Arctic Ocean and Barents Sea in the Atlantic Ocean.
Taxon
The circumpolar ophiuroid Ophiura sarsii, a common benthic species across the Arctic seas, has at least two cryptic lineages.
Methods
To better understand the genetic structures and the underlying evolutionary processes in the O. sarsii species complex, we compared the genome-wide single nucleotide polymorphism (SNP) data and COI of five geographical populations across the northern Pacific, Arctic and Atlantic Oceans using the 2b-RAD sequencing approach.
Results
Results clearly showed three highly diverged evolutionary lineages: northern Pacific lineage (O. sarsii vadicola), Pacific-Arctic lineage (LA) and Atlantic lineage (LB). The divMigrate analysis revealed significant gene flow within O. sarsii vadicola populations and O. sarsii LA populations, but no cross-species gene flow. Demographic analysis was used to estimate their historical divergence, in which the differentiation of O. sarsii vadicola predated that of the other two lineages of O. sarsii. Molecular dating resulted in an estimation of their divergence events between 3.88 and 1.67 Ma at Pliocene–Pleistocene using COI. Functional analysis revealed several enriched signalling pathways, potentially involved in ophiuroids' environmental adaptation.
Main Conclusions
Our study suggests three lineages of the cryptic species O. sarsii could split into at least two genetic species, including O. sarsii vadicola, North Pacific–Arctic and Atlantic O. sarsii. The hidden evolutionary trajectory is uncovered for the O. sarsii complex, shaped by paleoclimate and ocean currents. We emphasise the need for genome-wide SNP applications to understand the ophiuroid biodiversity and contribute to conservation in the Pacific–Arctic region.
期刊介绍：
Papers dealing with all aspects of spatial, ecological and historical biogeography are considered for publication in Journal of Biogeography. The mission of the journal is to contribute to the growth and societal relevance of the discipline of biogeography through its role in the dissemination of biogeographical research.
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