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首页> 外文期刊>Southeastern naturalist >Cave-obligate biodiversity on the campus of sewanee: The university of the South, Franklin County, Tennessee
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Cave-obligate biodiversity on the campus of sewanee: The university of the South, Franklin County, Tennessee

机译：sewanee校园内的洞穴生物多样性：田纳西州富兰克林县南部大学

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The southern Cumberland Plateau in Tennessee and Alabama has the greatest diversity of cave-obligate animals in the United States. The University of the South in Franklin County, TN is one of the largest private landholders on the southern Cumberland Plateau. Its 13,000-acre campus has more than 30 caves and is underlain by more than 14 km of horizontal passageways. We examined the biodiversity of cave animals on the campus at the species level and at the genetic level. Through a survey of seven caves on the campus, we identified 24 cave-obligate species, including two new county records. This total accounts for half of the cave-obligate species reported for Franklin County. For our genetic analysis, we selected six diverse taxa (two millipedes, a beetle, a fly, an aquatic isopod, and a spider) that were collected from multiple caves, and compared their mitochondrial cytochrome oxidase I gene sequences. Across the six taxa we found: (1) low genetic diversity within caves (mean nucleotide diversity within caves across all taxa: 0.25%), (2) high genetic divergence between caves (divergence between caves within taxa ranged from 2.5%-10.9%, with two exceptions), and (3) little evidence for gene flow between caves (FST between caves within taxa > 0.57, with one exception). Thus, the campus supports tremendous species diversity, and even more remarkable genetic diversity within those species on a small geographic scale (no studied caves were >7 km apart). The divergence between cave populations and lack of gene flow between them that we observed across a range of taxa highlight the importance of cave conservation on a regional scale.
机译：田纳西州和阿拉巴马州南部的坎伯兰高原（Cumberland Plateau）具有美国最富洞洞性的动物。田纳西州富兰克林县的南方大学是坎伯兰高原南部最大的私人土地所有者之一。它占地13,000英亩的校园内有30多个洞穴，并在14公里以上的水平通道下面。我们在物种级别和遗传级别上检查了校园内洞穴动物的生物多样性。通过对校园中的七个洞穴的调查，我们确定了24个洞穴专用物种，包括两个新的县级记录。该总数占富兰克林县报告的洞窟物种的一半。对于我们的遗传分析，我们选择了从多个洞穴中收集的六个不同的分类单元（两个千足虫，甲虫，苍蝇，水生异足动物和蜘蛛），并比较了它们的线粒体细胞色素氧化酶I基因序列。在六个分类单元中，我们发现：（1）洞穴内的遗传多样性低（所有分类单元中洞穴内的平均核苷酸多样性：0.25％），（2）洞穴之间的遗传多样性高（分类单元内洞穴之间的差异为2.5％-10.9％ ，其中有两个例外），以及（3）几乎没有证据表明洞穴之间存在基因流（分类单元内洞穴之间的FST> 0.57，一个例外）。因此，校园支持巨大的物种多样性，并且在较小的地理范围内（甚至没有相距> 7 km的洞穴）在这些物种中具有更为显着的遗传多样性。我们在一系列分类单元中观察到的洞穴种群之间的差异以及它们之间缺乏基因流动，突出了区域范围内洞穴保护的重要性。

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