Phylogeographic analysis and environmental niche modeling of the plain-bellied watersnake (Nerodia erythrogaster) reveals low levels of genetic and ecological differentiation.
Phylogeographic analysis and environmental niche modeling of the plain-bellied watersnake (Nerodia erythrogaster) reveals low levels of genetic and ecological differentiation.
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DOI：
10.1016/j.ympev.2010.03.012
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发表时间：
2010-06
影响因子：
4.1
通讯作者：
Rissler, Leslie J.
中科院分区：
文献类型：
--
作者：
Makowsky, Robert;Marshall, John C., Jr.;McVay, John;Chippindale, Paul T.;Rissler, Leslie J.
关键词：
表现出地理上确定的表型变异的物种传统上被划分为亚种。基于表型特征的亚种可能由于选择、基因流动和/或趋同进化而不包括单系群。在许多分类学类群中，曾经被指定为广布种的物种数量正在迅速减少，许多工作者完全拒绝亚种的概念。我们测试了目前公认的平腹水蛇Nerodia erythrogaster亚种是否与基于线粒体标记的关系一致，以及它是否代表一个单一的广泛分布的物种。这个分类群的分布范围跨越了多个潜在的地理屏障（特别是密西西比河和阿巴拉契科拉河），这与许多物种的谱系断裂相对应，包括其他蛇。我们从156个地理参考样本中测序了三个NADH-II，Cyt-b，Cox-I基因，并使用Maxent和空间明确的气候数据建立了生态位模型，以研究影响N变化的历史和生态因素。红腹龙在其分布范围内。总的来说，我们发现很少支持公认的亚种作为独立的进化谱系或地理限制的单位，并得出结论，虽然发生了一些遗传和生态位分化，大多数人口分配到N。红腹龙似乎代表了一个单一的广布物种。然而，额外的采样和核标记的应用是必要的，以澄清最东端人口的地位。
Species that exhibit geographically defined phenotypic variation traditionally have been divided into subspecies. Subspecies based on phenotypic features may not comprise monophyletic groups due to selection, gene flow, and/or convergent evolution. In many taxonomic groups the number of species once designated as widespread is dwindling rapidly, and many workers reject the concept of subspecies altogether. We tested whether currently recognized subspecies in the plain-bellied watersnake Nerodia erythrogaster are concordant with relationships based on mitochondrial markers, and whether it represents a single widespread species. The range of this taxon spans multiple potential biogeographic barriers (especially the Mississippi and Apalachicola Rivers) that correspond with lineage breaks in many species, including other snakes. We sequenced three mitochondrialgenes (NADH-II, Cyt-b, Cox-I) from 156 geo-referenced specimens and developed ecological niche models using Maxent and spatially-explicit climate data to examine historical and ecological factors affecting variation in N. erythrogaster across its range. Overall, we found little support for the recognized subspecies as either independent evolutionary lineages or geographically circumscribed units and conclude that although some genetic and niche differentiation has occurred, most populations assigned to N. erythrogaster appear to represent a single, widespread species. However, additional sampling and application of nuclear markers are necessary to clarify the status of the easternmost populations.
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影响因子：
4.1
作者：
Guiher, Timothy J.;Burbrink, Frank T.
通讯作者：
Burbrink, Frank T.
DOI：
10.1099/00207713-27-1-26
发表时间：
1977-01-01
期刊：
INTERNATIONAL JOURNAL OF SYSTEMATIC BACTERIOLOGY
影响因子：
--
作者：
COYKENDALL, AL
通讯作者：
COYKENDALL, AL
影响因子：
4.1
作者：
Alfaro, ME;Arnold, SJ
通讯作者：
Arnold, SJ
影响因子：
4.9
作者：
Doukakis, P;Birstein, VJ;Desalle, R
通讯作者：
Desalle, R
影响因子：
4.1
作者：
Burbrink, FT
通讯作者：
Burbrink, FT