Michelle D Shilling, Stacy A Krueger-Hadfield, James B McClintock
{"title":"遗传证据支持墨西哥湾北部陆龟的物种划分。","authors":"Michelle D Shilling, Stacy A Krueger-Hadfield, James B McClintock","doi":"10.1086/720972","DOIUrl":null,"url":null,"abstract":"<p><p>AbstractAccurate species delimitation is crucial to understanding biodiversity. In the northern Gulf of Mexico, recent genetic evidence has suggested that the tricolor <i>Luidia lawrencei</i> is not a species distinct from the gray <i>Luidia clathrata</i>. We collected <i>Luidia</i> specimens from Apalachee Bay, Florida, and morphologically identified 11 as <i>L. clathrata</i> and 16 as <i>L. lawrencei</i>. We sequenced 1074 bp of the cytochrome <i>c</i> oxidase subunit I (<i>COI</i>) and found ~14% divergence between <i>L. clathrata</i> and <i>L. lawrencei</i>, suggesting two distinct species (within-species divergence was <1%). Two specimens were phenotypically <i>L. lawrencei</i> (<i>i.e.</i>, tricolor morph) but mitochondrially were <i>L. clathrata</i>. Our findings lend support to maintaining <i>L. clathrata</i> and <i>L. lawrencei</i> as distinct species. However, the species boundary between these two taxa may be porous, and ongoing hybridization may occur when the two species are found in sympatry. Future work with nuclear markers is warranted to determine the frequency of hybridization and the extent of introgression. Clarifying the genetic relationship between these species will provide a baseline for assessing ongoing changes in connectivity of these two highly abundant sea stars in the rapidly warming northern Gulf of Mexico.</p>","PeriodicalId":55376,"journal":{"name":"Biological Bulletin","volume":null,"pages":null},"PeriodicalIF":2.1000,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Genetic Evidence Supports Species Delimitation of <i>Luidia</i> in the Northern Gulf of Mexico.\",\"authors\":\"Michelle D Shilling, Stacy A Krueger-Hadfield, James B McClintock\",\"doi\":\"10.1086/720972\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>AbstractAccurate species delimitation is crucial to understanding biodiversity. In the northern Gulf of Mexico, recent genetic evidence has suggested that the tricolor <i>Luidia lawrencei</i> is not a species distinct from the gray <i>Luidia clathrata</i>. We collected <i>Luidia</i> specimens from Apalachee Bay, Florida, and morphologically identified 11 as <i>L. clathrata</i> and 16 as <i>L. lawrencei</i>. We sequenced 1074 bp of the cytochrome <i>c</i> oxidase subunit I (<i>COI</i>) and found ~14% divergence between <i>L. clathrata</i> and <i>L. lawrencei</i>, suggesting two distinct species (within-species divergence was <1%). Two specimens were phenotypically <i>L. lawrencei</i> (<i>i.e.</i>, tricolor morph) but mitochondrially were <i>L. clathrata</i>. Our findings lend support to maintaining <i>L. clathrata</i> and <i>L. lawrencei</i> as distinct species. However, the species boundary between these two taxa may be porous, and ongoing hybridization may occur when the two species are found in sympatry. Future work with nuclear markers is warranted to determine the frequency of hybridization and the extent of introgression. Clarifying the genetic relationship between these species will provide a baseline for assessing ongoing changes in connectivity of these two highly abundant sea stars in the rapidly warming northern Gulf of Mexico.</p>\",\"PeriodicalId\":55376,\"journal\":{\"name\":\"Biological Bulletin\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2022-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Biological Bulletin\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1086/720972\",\"RegionNum\":4,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2022/8/5 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q2\",\"JCRName\":\"BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biological Bulletin","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1086/720972","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2022/8/5 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"BIOLOGY","Score":null,"Total":0}
Genetic Evidence Supports Species Delimitation of Luidia in the Northern Gulf of Mexico.
AbstractAccurate species delimitation is crucial to understanding biodiversity. In the northern Gulf of Mexico, recent genetic evidence has suggested that the tricolor Luidia lawrencei is not a species distinct from the gray Luidia clathrata. We collected Luidia specimens from Apalachee Bay, Florida, and morphologically identified 11 as L. clathrata and 16 as L. lawrencei. We sequenced 1074 bp of the cytochrome c oxidase subunit I (COI) and found ~14% divergence between L. clathrata and L. lawrencei, suggesting two distinct species (within-species divergence was <1%). Two specimens were phenotypically L. lawrencei (i.e., tricolor morph) but mitochondrially were L. clathrata. Our findings lend support to maintaining L. clathrata and L. lawrencei as distinct species. However, the species boundary between these two taxa may be porous, and ongoing hybridization may occur when the two species are found in sympatry. Future work with nuclear markers is warranted to determine the frequency of hybridization and the extent of introgression. Clarifying the genetic relationship between these species will provide a baseline for assessing ongoing changes in connectivity of these two highly abundant sea stars in the rapidly warming northern Gulf of Mexico.
期刊介绍:
The Biological Bulletin disseminates novel scientific results in broadly related fields of biology in keeping with more than 100 years of a tradition of excellence. The Bulletin publishes outstanding original research with an overarching goal of explaining how organisms develop, function, and evolve in their natural environments. To that end, the journal publishes papers in the fields of Neurobiology and Behavior, Physiology and Biomechanics, Ecology and Evolution, Development and Reproduction, Cell Biology, Symbiosis and Systematics. The Bulletin emphasizes basic research on marine model systems but includes articles of an interdisciplinary nature when appropriate.