Molecular taxonomy in the dark:: Evolutionary history, phylogeography, and diversity of cave crayfish in the subgenus Aviticambarus, genus Cambarus
Molecular taxonomy in the dark:: Evolutionary history, phylogeography, and diversity of cave crayfish in the subgenus Aviticambarus, genus Cambarus
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DOI：
10.1016/j.ympev.2006.07.014
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发表时间：
2007-02-01
影响因子：
4.1
通讯作者：
Crandall, Keith A.
中科院分区：
文献类型：
--
作者：
Buhay, Jennifer E.;Moni, Gerald;Crandall, Keith A.
淡水螯虾亚属Aviticambarus（Cambaridae：Cambarus）的物种仅限于沿着坎伯兰高原，Sequatchie山谷和高地边缘的洞穴，这些洞穴沿着田纳西州中南部和北方亚拉巴马的田纳西河延伸。历史上，三个stygobitic物种，Cambarus jonesi，Cambarus hamulatus和Cambarusveitchorum，组成了这个亚属。我们研究了物种的边界和这一危险的南阿巴拉契亚组合的地理结构，以揭示洞穴殖民化的轻油模式。我们还提供了估计的遗传多样性的保护状态评估。使用地质证据，地理分析，和序列数据从五个基因区域（两个核：历史H3和GAPDH和三个线粒体：12S，16S和CO1总计近2700个碱基对），我们确定了两个支持的神秘物种除了目前公认的三个类群。这些类群表现出低水平的遗传变异，目前和历史上，这可能表明当地灭绝事件与地质和流域变化。我们的研究结果也支持其他最近的研究结果，前更新世古水系可能最好地解释目前的模式，水生动物的生物多样性在南阿巴拉契亚山脉。(c)2006年爱思唯尔公司All rights reserved.
Freshwater crayfish species in the subgenus Aviticambarus (Cambaridae: Cambarus) are restricted to caves along the Cumberland Plateau, the Sequatchie Valley, and the Highland Rim which extend along the Tennessee River in southcentral Tennessee and northern Alabama. Historically, three stygobitic species, Cambarus jonesi, Cambarus hamulatus, and Cambarusveitchorum,comprise this subgenus. We examine species' boundaries and phylogeographic structure of this imperiled Southern Appalachian assemblage to shed light oil patterns of cave colonization. We also provide estimates of genetic diversity for conservation status assessment. Using geologic evidence, phylogeographic analyses, and sequence data from five gene regions (two nuclear: Historic H3 and GAPDH and three mitochondrial: 12S, 16S, and CO1 totaling almost 2700 base pairs), we identify two well-supported cryptic species in addition to the three currently recognized taxa. Four of these taxa exhibit low levels of genetic variation both currently and historically, which may indicate local extirpation events associated with geological and river basin changes. Our results also support other recent findings that pre-Pleistocene paleodrainages may best explain the current patterns of aquatic faunal biodiversity in the Southern Appalachians. (c) 2006 Elsevier Inc. All rights reserved.