Punctuated invasion of water, ice, snow and terrestrial ecozones by segmented worms (Oligochaeta: Enchytraeidae: Mesenchytraeus)
Punctuated invasion of water, ice, snow and terrestrial ecozones by segmented worms (Oligochaeta: Enchytraeidae: Mesenchytraeus)
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分段蠕虫（Oligochaeta：Enchytraeidae：Mesenchytraeus）对水、冰、雪和陆地生态区的间断入侵
DOI：
10.1098/rspb.2017.1081
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
D. Shain
中科院分区：
文献类型：
--
作者：
Shirley A. Lang;N. Sağlam;J. Kawash;D. Shain
节蠕虫（环节动物）是世界上极端环境中最成功的动物居民之一。Mesenchytraeus属（Mesenchytraeus属）是一种罕见的少毛纲动物，广泛分布于北美洲西北太平洋地区，分布在从低海拔雨林和水道到高海拔冰川的地理近端生态带。沿着这一高度样带，收集了来自不同生境类型的间叶龙代表，并进行了线粒体和核系统发育分析。我们的数据确定了基因树之间显著的拓扑不一致，以及接近相等的种间差异水平，表明了快速的辐射事件。总的来说，我们的研究结果确定了中叶虫的“爆发”与太平洋西北地区的造山活动同时发生，这一活动产生了密切相关的水生、冰、雪和陆生蠕虫。
Segmented worms (Annelida) are among the most successful animal inhabitants of extreme environments worldwide. An unusual group of enchytraeid oligochaetes of genus Mesenchytraeus are abundant in the Pacific northwestern region of North America and occupy geographically proximal ecozones ranging from low elevation rainforests and waterways to high altitude glaciers. Along this altitudinal transect, Mesenchytraeus representatives from disparate habitat types were collected and subjected to deep mitochondrial and nuclear phylogenetic analyses. Our data identify significant topological discordance among gene trees, and near equivalent interspecific divergence levels indicative of a rapid radiation event. Collectively, our results identify a Mesenchytraeus ‘explosion’ coincident with mountain building in the Pacific northwestern region that gave rise to closely related aquatic, ice, snow and terrestrial worms.
影响因子：
3.3
作者：
B. Rannala;Ziheng Yang
通讯作者：
B. Rannala;Ziheng Yang
DNA 序列分析。
影响因子：
2.3
作者：
Weir,BS
通讯作者：
Weir,BS