Phylogeography and genetics of the globally invasive snail Physa acuta Draparnaud 1805, and its potential to serve as an intermediate host to larval digenetic trematodes.
Phylogeography and genetics of the globally invasive snail Physa acuta Draparnaud 1805, and its potential to serve as an intermediate host to larval digenetic trematodes.
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DOI：
10.1186/s12862-018-1208-z
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发表时间：
2018-07-03
影响因子：
3.4
通讯作者：
Brant SV
中科院分区：
文献类型：
--
作者：
Ebbs ET;Loker ES;Brant SV
尖膀胱螺是一种原产于北美的全球性入侵淡水螺。先前的研究对于尖膀胱螺种群之间的联系以及全球遗传多样性的分布情况产生了相互矛盾的观点。本研究旨在描绘尖膀胱螺原生范围内的系统发育地理和种群遗传结构特征，阐明其入侵历史，并评估全球遗传多样性模式。此外，我们运用荟萃分析方法，在尖膀胱螺 - 复殖吸虫系统中检验“天敌释放假说”。“天敌释放假说”是指宿主在入侵区域定殖后，其原生寄生虫的丧失。我们将种群遗传数据与吸虫感染调查相结合，绘制与尖膀胱螺相关的吸虫物种丰富度的分布范围图，并确定在宿主 - 寄生虫入侵建模中重要的相关宿主种群参数。
基于线粒体DNA的系统发育分析揭示出两个主要分支（A和B）。A分支在全球均有分布，而B分支仅在美国西部发现。所有采样的入侵种群都归属于A分支，在该分支中，已从北美各地确定了多个独立的源种群。在尖膀胱螺的原生范围内发现了显著的种群遗传结构，有一些证据表明西部和东部种群之间存在当代地理屏障。发现线粒体 - 细胞核不一致现象，这表明两个线粒体分支之间存在历史隔离以及二次接触。结果发现，原生种群和入侵种群的吸虫物种丰富度存在显著差异，这与“天敌释放假说”相符。此外，我们的数据表明，入侵种群的核苷酸多样性与吸虫的感染率和丰富度之间存在正相关关系。
本研究在尖膀胱螺的原生范围内进行了更广泛的地理采样，有助于深入了解其系统发育地理和种群遗传结构、分布范围内的遗传多样性以及对入侵历史的评估。对全球尖膀胱螺 - 吸虫调查的荟萃分析与“天敌释放假说”一致。此外，本研究结果表明，宿主的人口统计学参数，即作为种群规模替代指标的遗传多样性，可能在寄生虫群落如何在入侵宿主种群中聚集方面发挥重要作用。这些知识可用于初步构建一个框架，以模拟宿主 - 寄生虫随时间变化的入侵动态。
本文的网络版本（10.1186/s12862 - 018 - 1208 - z）包含补充材料，仅供授权用户使用。
Physa acuta is a globally invasive freshwater snail native to North America. Prior studies have led to conflicting views of how P. acuta populations are connected and genetic diversity is partitioned globally. This study aims to characterize phylogeographic and population genetic structure within the native range of P. acuta, elucidate its invasion history and assess global patterns of genetic diversity. Further, using meta-analytic methods, we test the ‘Enemy-Release hypothesis’ within the P. acuta – digenetic trematode system. The ‘Enemy-Release hypothesis’ refers to the loss of native parasites following establishment of their host within an invasive range. Population genetic data is combined with surveys of trematode infections to map range-wide trematode species richness associated with P. acuta, and to identify relevant host-population parameters important in modeling host-parasite invasion. Phylogenetic analyses using mtDNA uncovered two major clades (A & B). Clade A occurs globally while clade B was only recovered from the Western USA. All invasive populations sampled grouped within Clade A, where multiple independent source populations were identified from across North America. Significant population genetic structure was found within the native range of P. acuta, with some evidence for contemporary geographic barriers between western and eastern populations. Mito-nuclear discordance was found suggesting historical isolation with secondary contact between the two mitochondrial clades. Trematode species richness was found to differ significantly between native and invasive populations, in concordance with the ‘Enemy-Release hypothesis’. Further, our data suggests a positive relationship between nucleotide diversity of invasive populations and trematode prevalence and richness. This study includes a wider geographic sampling of P. acuta within its native range that provides insight into phylogeographic and population genetic structure, range-wide genetic diversity and estimation of the invasion history. Meta-analysis of P. acuta – trematode surveys globally is consistent with the ‘Enemy-Release hypothesis’. Additionally, results from this study suggest that host demographic parameters, namely genetic diversity as a proxy for population size, may play an essential role in how parasite communities assemble within invasive host populations. This knowledge can be used to begin to construct a framework to model host-parasite invasion dynamics over time. The online version of this article (10.1186/s12862-018-1208-z) contains supplementary material, which is available to authorized users.
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影响因子：
10.7
作者：
Castresana, J
通讯作者：
Castresana, J
影响因子：
1.6
作者：
Akinwale, O. P.;Kane, R. A.;Adeleke, M. A.
通讯作者：
Adeleke, M. A.
影响因子：
1.4
作者：
Appleton, C. C.
通讯作者：
Appleton, C. C.
影响因子：
2.9
作者：
Albrecht, Christian;Kroll, Oliver;Wilke, Thomas
通讯作者：
Wilke, Thomas
DOI：
10.1111/j.2517-6161.1995.tb02031.x
发表时间：
1995-01-01
影响因子：
5.8
作者：
BENJAMINI, Y;HOCHBERG, Y
通讯作者：
HOCHBERG, Y