Human-mediated pressures, including bioinvasions, threaten the biotas of every continent. Hybridization and introgression between invasive and native species may result in loss of genetic integrity of native taxa but, in many cases, these events are hard to detect because the invader is impossible to tell apart from the native taxon. The problem of cryptic invasive taxa and its importance for biodiversity protection have been underestimated, because of the limited number of studies of broadly distributed taxa using sensitive nuclear DNA markers. We employed a panel of 51 single nucleotide polymorphism (SNP) markers to examine genetic interactions between Australian native smooth-shelled mussels, Mytilus planulatus, and invasive and cryptic Northern Hemisphere M. galloprovincialis along 4400 km of coastline from the Pacific to the Indian Ocean. Overall, 20.8% of mussels from ten sites were native species. The centre of distribution of M. planulatus is in south-eastern Australia, in particular in Tasmania. We suggest that ongoing spatial and temporal monitoring of Tasmanian sites is required to test for the presence of M. galloprovincialis and its possible further spread, and that hatchery production of M. planulatus for farming and reseeding into the wild may help reduce the likelihood of its loss.

中文翻译：

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对澳大利亚本土平滑壳贻贝（贻贝属）的综合威胁：生物入侵和杂交

人类介导的压力，包括生物入侵，威胁着每个大陆的生物群。入侵物种和本地物种之间的杂交和渗入可能导致本地分类群的遗传完整性丧失，但在许多情况下，这些事件很难检测到，因为入侵者无法与本地分类群区分开来。由于使用敏感的核 DNA 标记对广泛分布的分类群进行的研究数量有限，神秘的入侵分类群的问题及其对生物多样性保护的重要性被低估了。我们使用一组 51 个单核苷酸多态性 (SNP) 标记来检查澳大利亚本土光滑壳贻贝、扁平贻贝和侵入性和隐秘的北半球 M. galloprovincialis 之间的遗传相互作用，这些 M. galloprovincialis 沿着从太平洋到印度洋的 4400 公里海岸线。总体而言，来自 10 个地点的贻贝中有 20.8% 是本地物种。M. planulatus 的分布中心在澳大利亚东南部，特别是在塔斯马尼亚。我们建议需要对塔斯马尼亚的地点进行持续的空间和时间监测，以测试 M. galloprovincialis 的存在及其可能的进一步传播，并且用于养殖和再播种到野外的 M. planulatus 的孵化场生产可能有助于降低其发生的可能性。失利。