MtDNA metagenomics reveals large-scale invasion of belowground arthropod communities by introduced species

作者：Cicconardi Francesco; Borges Paulo A V; Stra**erg Dominique; Oromi Pedro; Lopez Heriberto; Perez Delgado Antonio J; Casquet Juliane; Caujape Castells Juli; Maria Fernandez Palacios Jose; Thebaud Christophe; Emerson Brent C^*

来源：Molecular Ecology, 2017, 26(12): 3104-3115.

DOI：10.1111/mec.14037

• introduced species
• invertebrate
• island biogeography
• mesofauna
• soil

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.

• 出版日期2017-6