...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Biogeography >Trapped in desert springs: phylogeography of Australian desert spring snails
【24h】

Trapped in desert springs: phylogeography of Australian desert spring snails

机译：被困在沙漠之泉：澳大利亚沙漠之春蜗牛的系统志

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Aim We investigate the phylogeographical history and determine the time-scale of population divergence of hydrobiid freshwater snails (genus Trochidrobia) inhabiting groundwater springs in the Australian desert. We test the hypothesis that divergence between geographically distinct snail populations occurred simultaneously due to their isolation in hydrologically discrete spring systems, i.e. trapped in desert springs. Location Groundwater springs of the Great Artesian Basin (GAB) in central Australia. Methods DNA sequence data from the mitochondrial cytochrome c oxidase subunit I gene and the nuclear 28S and internal transcribed spacer rRNA genes were used to reconstruct phylogenetic relationships within and among three species of Trochidrobia (Hydrobiidae): T. punicea (13 spring groups, n = 90), T. smithi (12 spring groups, n = 62) and T. minuta (2 spring groups, n = 4). Bayesian relaxed molecular clock analyses and approximate Bayesian computation were used to date lineage divergence and distinguish between alternative biogeographical scenarios. Results The diversification of the three Trochidrobia species probably occurred between 2.54 and 9.3 Ma, prior to the formation of the springs c. 1 Ma. Intraspecific divergences within the two widespread species occurred after the formation and colonization of the springs. Coalescent modelling and molecular clock analyses supported a simultaneous radiation of five allopatric intraspecific snail lineages within T. punicea (two lineages) and T. smithi (three lineages) across the GAB springs examined. Main conclusions The analyses support the trapped in desert springs hypothesis for the diversification of intraspecific lineages within the species T. punicea and T. smithi. This hypothesis suggests that the formation of deserts around Lake Eyre in the early Pleistocene led to the hydrological isolation of spring complexes in the GAB, resulting in significant molecular divergence, but no morphological divergence, of Trochidrobia snail populations.
机译：目的我们调查植物地理学的历史，并确定居住在澳大利亚沙漠中的地下水泉中的水生生物淡水蜗牛（Trochidrobia属）种群散布的时间尺度。我们检验了这样一个假设，即由于地理上不同的蜗牛种群在水文离散的泉水系统（即困在沙漠泉水）中的隔离而同时发生。位置澳大利亚中部大自流盆地（GAB）的地下水泉。方法利用线粒体细胞色素c氧化酶亚基I基因，核内28S基因和内部转录间隔区rRNA基因的DNA序列数据，构建3种斜纹夜蛾（T. punicea）（P。punicea，13个春季群，n = 90），史密斯猪笼草（12个弹簧组，n = 62）和牛膝草（2个弹簧组，n = 4）。贝叶斯松弛分子时钟分析和近似贝叶斯计算被用来确定谱系的差异并区分不同的生物地理场景。结果3种Trochidrobia物种的多样性可能发生在春季形成之前的2.54至9.3 Ma之间。 1麻在弹簧的形成和定殖之后，在两个广泛的物种内发生种内差异。联合建模和分子时钟分析支持在被检查的GAB弹簧中同时在T. punicea（两个谱系）和Smith。T. smithi（三个谱系）内同时辐射五个异体种内蜗牛谱系。主要结论该分析支持被困在沙漠之泉假说中，以实现刺槐和史密斯种内种内谱系的多样化。该假设表明，在更新世早期，艾尔湖周围的沙漠形成导致GAB中春季复合物的水文隔离，从而导致毛状线虫蜗牛种群具有明显的分子差异，但没有形态差异。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号