Phylogeography of a freshwater red alga, Batrachospermum helminthosum, in North America
| العنوان: | Phylogeography of a freshwater red alga, Batrachospermum helminthosum, in North America |
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| المؤلفون: | Nicholas J. Machesky, Morgan L. Vis, Wayne B. Chiasson |
| المصدر: | Phycologia. 42:654-660 |
| بيانات النشر: | Informa UK Limited, 2003. |
| سنة النشر: | 2003 |
| مصطلحات موضوعية: | education.field_of_study, Phylogenetic tree, Ecology, Range (biology), Haplotype, Population, Zoology, Plant Science, Aquatic Science, Biology, Phylogeography, Taxon, Refugium (population biology), Biological dispersal, education |
| الوصف: | The mitochondrial DNA region consisting of the intergenic spacer between the cytochrome oxidase subunit 2 and cytochrome oxidase subunit 3 genes with the flanking gene regions (cox2–3) was used to investigate phylogeographic trends among populations of Batrachospermum helminthosum. Thirteen stream segments throughout the range of this taxon in North America were sampled as follows: four in Ohio, two in Michigan and one each in Connecticut, Indiana, Louisiana, Massachusetts, North Carolina, Rhode Island and Tennessee. Fifteen thalli per stream reach were analysed except for OH1 in which 54 individuals were studied. Thirteen haplotypes were detected among the 234 individuals sequenced from the 13 locations. One location (TN) had four haplotypes, six locations (OH1, 2, 3, CT, NC, MA) had two haplotypes and the remaining six (OH4, MI1, 2, IN, LA, RI) had only one. Only four of the haplotypes were shared among two or more locations. Even though haplotypes were mainly confined to one stream segment, many of them differed by only 1–3 bp. Phylogenetic analyses showed two divergent lineages: the first contained 10 of the 13 haplotypes from MA, RI, CT, OH (1–3), NC, IN, LA and TN locations; the second contained one haplotype from TN, and two other haplotypes from the OH4 location and the two MI locales. It would appear that genetically similar haplotypes dominate much of the range of B. helminthosum. We hypothesize that dispersal via small streamside-dwelling birds may be the mechanism to explain this pattern. The Tennessee location is interesting in that it had twice as many haplotypes as the other locations (even OH1 with 54 individuals sampled). This result may be due to multiple colonization events at that stream by genetically heterogeneous individuals or alternatively, this population could be more ancient than the others with this location serving as a mountain refugium during the last glaciation. |
| تدمد: | 2330-2968 0031-8884 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::da6796f89e1068e78ba8097f9afc1e22 https://doi.org/10.2216/i0031-8884-42-6-654.1 |
| رقم الأكسشن: | edsair.doi...........da6796f89e1068e78ba8097f9afc1e22 |
| قاعدة البيانات: | OpenAIRE |
PDF full text from Publisher | تدمد: | 23302968 00318884 |
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