Accurately characterizing the provenance and genetic diversity of non-native populations aids the management of biotic invasions because population-level genetic diversity is potentially correlated with invasive success. We sequenced the mitochondrial DNA of non-native Phelsuma grandis Gray 1870 (Cyt-b, 610 bp) and Gekko gecko (Linnaeus 1758) (ND2, 751 bp) specimens collected from southern Florida, and compared these sequences to those of georeferenced native-range conspecifics. Multiple mtDNA clades were identified in southern Florida populations of both species. In the case of G. gecko these were traceable to geographically distinct native-range locales, confirming that southern Florida’s population ultimately derives from multiple native-range regions. The majority of the P. grandis sequenced were closely allied with a specimen from the far north of Madagascar, while a minority clustered in a well-supported clade with P. grandis derived from northeastern Madagascar. Sympatry of individuals belonging to multiple mtDNA clades was confirmed for both species, and uncorrected pairwise distances as high as 11.41% were detected in sympatric G. gecko, highlighting the potential for interpopulation—and perhaps even interspecific—diversity to be transformed into intrapopulation diversity during invasion events. Our findings provide further evidence that introduced squamate populations are frequently highly heterogeneous and derived from multiple, distinct native-range lineages.

准确描述非本地人口的起源和遗传多样性有助于管理生物入侵，因为人口水平的遗传多样性可能与入侵成功相关。我们对从佛罗里达州南部采集的非天然Phelsuma grandis Gray 1870（Cyt- b，610 bp）和Gekko gecko（Linnaeus 1758）（ND2，751 bp）标本的线粒体DNA进行了测序，并将这些序列与地理参考的本地-范围规格。在两个物种的佛罗里达南部种群中发现了多个mtDNA进化枝。在G的情况下。壁虎这些都可以追溯到地理上不同的原住民地区，这证实了佛罗里达州南部的人口最终来自多个原住民地区。P的大多数。桉测序与来自遥远的北方马达加斯加的标本有密切联系，而少数与良好支持的分支聚集P。grandis来自马达加斯加东北部。这两个物种都证实了属于多个mtDNA进化枝的个体的交感，并且在同胞G中检测到高达11.41％的未校正成对距离。壁虎，强调了种群入侵（甚至物种间）多样性在入侵事件期间转化为种群内多样性的潜力。我们的发现提供了进一步的证据，表明引入的鳞状上皮种群通常是高度异质的，并且源自多个不同的原生范围谱系。