Neoisoptera repeatedly colonised Madagascar after the Middle Miocene climatic optimum
Neoisoptera repeatedly colonised Madagascar after the Middle Miocene climatic optimum
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新等翅目在中中新世气候最适宜期后反复定居马达加斯加
DOI：
10.1111/ecog.06463
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发表时间：
2023
期刊：
影响因子：
5.9
通讯作者：
Bourguignon Thomas
中科院分区：
文献类型：
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作者：
Wang Menglin;Hellemans Simon;Bucek Ales;Kanao Taisuke;Arora Jigyasa;Clitheroe Crystal;Rafanomezantsoa Jean‐Jacques;Fisher Brian L.;Scheffrahn Rudolf;Sillam‐Dusses David;Roisin Yves;Sobotnik Jan;Bourguignon Thomas
由于自古以来与其他大陆隔绝，马达加斯加是许多特有动植物物种的家园。这种独特的动物群包括白蚁的几个谱系，白蚁是一组以在许多陆地生态系统中有机物分解中起关键作用而闻名的昆虫。白蚁是如何以及何时在马达加斯加定居的仍不得而知。在这项研究中，我们使用了601个线粒体基因组，其中93个来自马达加斯加的样本，来推断新等翅目的全球历史生物地理，该谱系包含超过80%的已描述白蚁物种。结果表明，新等翅目在中新世的8.4 ~ 16.6 Ma （95% HPD: 6.1 ~ 19.9 Ma）范围内独立在马达加斯加定居了7 ~ 10次。这个时间与新等翅目昆虫殖民澳大利亚的时间相吻合。此外，马达加斯加和澳大利亚的新等翅目动物群的分类组成惊人地相似，马达加斯加还拥有澳大利亚没有的另外两个谱系。因此，与澳大利亚类似，新等翅目动物在全球草原扩张期间占领了马达加斯加，这可能得益于这种新生物群系的传播所带来的生态机遇。
Madagascar is home to many endemic plant and animal species owing to its ancient isolation from other landmasses. This unique fauna includes several lineages of termites, a group of insects known for their key role in organic matter decomposition in many terrestrial ecosystems. How and when termites colonised Madagascar remains unknown. In this study, we used 601 mitochondrial genomes, 93 of which were generated from Malagasy samples, to infer the global historical biogeography of Neoisoptera, a lineage containing more than 80% of described termite species. Our results indicate that Neoisoptera colonised Madagascar between 7 and 10 times independently during the Miocene, between 8.4 and 16.6 Ma (95% HPD: 6.1–19.9 Ma). This timing matches that of the colonization of Australia by Neoisoptera. Furthermore, the taxonomic composition of the Neoisopteran fauna of Madagascar and Australia are strikingly similar, with Madagascar harbouring an additional two lineages absent from Australia. Therefore, akin to Australia, Neoisoptera colonised Madagascar during the global expansion of grasslands, possibly helped by the ecological opportunities arising from the spread of this new biome.