MtDNA metagenomics reveals large-scale invasion of belowground arthropod communities by introduced species
MtDNA metagenomics reveals large-scale invasion of belowground arthropod communities by introduced species
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DOI：
10.1111/mec.14037
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发表时间：
2017-06-01
影响因子：
4.9
通讯作者：
Emerson, Brent C.
中科院分区：
文献类型：
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作者：
Cicconardi, Francesco;Borges, Paulo A. V.;Emerson, Brent C.
通过在遥远的海洋岛屿森林生态系统中进行一系列标准化采样，我们揭示了地上和地下节肢动物生物多样性结构之间的根本差异，这种差异可能是由于人类大规模引入物种造成的。甲虫和蜘蛛的种类几乎全部来自单个岛屿，而土壤栖息的线虫在岛屿之间的物种共享率高出10倍以上。将弹珠虫线粒体宏基因组数据与包含8万多个弹珠虫条形码序列的数据库进行比较，发现几乎30%的岛屿物种样本与通常来自世界上非常遥远的地理区域的个体基因相同或接近相同。弹线虫间的mtDNA亲缘关系模式与人类介导的物种引进有关，对样本岛屿上引进物种比例的最低估计在45%至88%之间。我们的研究结果呼吁更多地关注土壤中动物群，以了解物种引入的全球范围和生态后果。
Using a series of standardized sampling plots within forest ecosystems in remote oceanic islands, we reveal fundamental differences between the structuring of above-ground and belowground arthropod biodiversity that are likely due to large-scale species introductions by humans. Species of beetle and spider were sampled almost exclusively from single islands, while soil-dwelling Collembola exhibited more than tenfold higher species sharing among islands. Comparison of Collembola mitochondrial metagenomic data to a database of more than 80 000 Collembola barcode sequences revealed almost 30% of sampled island species are genetically identical, or near identical, to individuals sampled from often very distant geographic regions of the world. Patterns of mtDNA relatedness among Collembola implicate human-mediated species introductions, with minimum estimates for the proportion of introduced species on the sampled islands ranging from 45% to 88%. Our results call for more attention to soil mesofauna to understand the global extent and ecological consequences of species introductions.