Patterns of cave biodiversity and endemism in the Appalachians and Interior Plateau of Tennessee, USA.
Patterns of cave biodiversity and endemism in the Appalachians and Interior Plateau of Tennessee, USA.
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DOI：
10.1371/journal.pone.0064177
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Zigler KS
中科院分区：
文献类型：
--
作者：
Niemiller ML;Zigler KS
利用物种分布数据，我们开发了一个田纳西州穴居动物（洞穴专性物种）的地理参考数据库，以研究物种丰富度和特有性的空间格局，包括200个描述物种的2000多条记录。在田纳西州的洞穴中发现了40种水生穴居动物（stygobions）和160种陆生穴居动物，后者在美国各州中具有最大的多样性。特有性很高，25%的陆生穴居动物（40种）和20%的stygobiont（8种）仅来自一个洞穴，近三分之二的穴居动物（130种）来自五个或更少的洞穴。物种丰富度和特有性是最大的内陆高原（IP）和西南阿巴拉契亚山脉（SWA）生态区，这是两倍的山脊和山谷（RV）的多样性。穴居生物物种组合之间的IP和SWA，共有59种，而RV洞穴动物群在很大程度上是不同的最相似的。我们确定了一个热点的洞穴生物多样性与中心沿着悬崖的坎伯兰高原在田纳西州中南部的物种丰富度和特有性，这是连续与以前定义的热点在东北部亚拉巴马。近一半（91种）的田纳西州的穴居生物多样性发生在这个地区，其中几个洞穴系统包含10个或更多的穴居生物，其中包括一个有23种。此外，我们确定了全州不同的troglobiont社区。这些社区对应的水文边界，并可能反映过去或目前的地下栖息地之间的连接和水文流域之间的障碍。虽然种类繁多，田纳西州的地下动物群仍然研究甚少，许多其他物种等待发现和描述。我们确定了几个采样不足的地区，并概述了保护和管理的优先事项，以提高我们的知识和援助，在田纳西州的地下生物多样性的保护。
Using species distribution data, we developed a georeferenced database of troglobionts (cave-obligate species) in Tennessee to examine spatial patterns of species richness and endemism, including >2000 records for 200 described species. Forty aquatic troglobionts (stygobionts) and 160 terrestrial troglobionts are known from caves in Tennessee, the latter having the greatest diversity of any state in the United States. Endemism was high, with 25% of terrestrial troglobionts (40 species) and 20% of stygobionts (eight species) known from just a single cave and nearly two-thirds of all troglobionts (130 species) known from five or fewer caves. Species richness and endemism were greatest in the Interior Plateau (IP) and Southwestern Appalachians (SWA) ecoregions, which were twice as diverse as the Ridge and Valley (RV). Troglobiont species assemblages were most similar between the IP and SWA, which shared 59 species, whereas the RV cave fauna was largely distinct. We identified a hotspot of cave biodiversity with a center along the escarpment of the Cumberland Plateau in south-central Tennessee defined by both species richness and endemism that is contiguous with a previously defined hotspot in northeastern Alabama. Nearly half (91 species) of Tennessee’s troglobiont diversity occurs in this region where several cave systems contain ten or more troglobionts, including one with 23 species. In addition, we identified distinct troglobiont communities across the state. These communities corresponded to hydrological boundaries and likely reflect past or current connectivity between subterranean habitats within and barriers between hydrological basins. Although diverse, Tennessee’s subterranean fauna remains poorly studied and many additional species await discovery and description. We identified several undersampled regions and outlined conservation and management priorities to improve our knowledge and aid in protection of the subterranean biodiversity in Tennessee.
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影响因子：
4.9
作者：
Buhay, JE;Crandall, KA
通讯作者：
Crandall, KA
影响因子：
1.1
作者：
Buhay, Jennifer E.;Crandall, Keith A.
通讯作者：
Crandall, Keith A.
影响因子：
4.1
作者：
Buhay, Jennifer E.;Moni, Gerald;Crandall, Keith A.
通讯作者：
Crandall, Keith A.
影响因子：
1.3
作者：
Cardoso, Pedro
通讯作者：
Cardoso, Pedro
影响因子：
3.4
作者：
Culver, DC;Christman, MC;Reddell, JR
通讯作者：
Reddell, JR