Genetic diversity in a morphologically conservative invasive taxon: Multiple introductions of swamp eels to the Southeastern United States
Genetic diversity in a morphologically conservative invasive taxon: Multiple introductions of swamp eels to the Southeastern United States
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DOI：
10.1046/j.1523-1739.2002.01182.x
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发表时间：
2002-08-01
影响因子：
6.3
通讯作者：
Rawlings, TA
中科院分区：
文献类型：
--
作者：
Collins, TM;Trexler, JC;Rawlings, TA
对引进种群进行遗传分析，特别是对形态保守的分类群进行遗传分析，可以阐明引进历史，确定管理单位和源种群，对成功入侵的频率提供更现实的估计，并提出防止进一步引进的策略。近7年来，在美国佐治亚州亚特兰大附近的水生生境中发现了沼泽鳗种群，根据其外部形态，沼泽鳗属亚洲单鳍鳗（合鳃鳗科）；佛罗里达州坦帕市;北迈阿密，佛罗里达州；最近一次是在佛罗里达州霍姆斯特德的沼泽地国家公园附近。沼泽鳗鱼是大型食肉动物，能够在陆地上扩散，有可能破坏已经受到威胁的生态系统。我们分析了来自美国大陆四个已知种群的线粒体DNA序列，以及来自马来西亚、印度尼西亚、越南和中国两个地点的样本，以确定引进历史、源种群、遗传多样性和种群之间的关系。我们的结果表明，至少有三种遗传上不同形式的独立引进。近距离引进的种群(由
Genetic analysis of introduced populations, especially in morphologically conservative taxa, can clarify introduction histories, identify management units and source populations, provide a more realistic estimate of the frequency of successful invasion, and suggest strategies for preventing further introductions. In the last 7 years, populations of swamp eels, referred to the Asian genus Monopterus (Family Synbranchidae) on the basis of external morphology, have been discovered in aquatic habitats near Atlanta, Georgia; Tampa, Florida; North Miami, Florida; and most recently in close proximity to Everglades National Park in Homestead, Florida. Swamp eels are large predators capable of dispersal over land and have the potential to disrupt already threatened ecosystems. We analyzed mitochondrial DNA sequences from four known populations in the continental United States and samples from Malaysia, Indonesia, Vietnam, and two locations in China to determine introduction histories, source populations, genetic diversity, and relationships among populations. Our results indicate that there have been at least three independent introductions of genetically distinct forms. Introduced populations in close proximity (separated by