The key role of vicariance for soil animal biogeography in a biodiversity hotspot region
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2025
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| author | Pan, Xue Kreft, Holger Lu, Jing-Zhong Du, Yabin Scheu, Stefan Maraun, Mark |
| author_facet | Pan, Xue Kreft, Holger Lu, Jing-Zhong Du, Yabin Scheu, Stefan Maraun, Mark |
| contents | <p><strong>Aim</strong>: The Indo-Australian Archipelago is known as a biodiversity hotspot with a high level of endemism typically ascribed to vicariance as reflected by the "Wallace's line". However, it is unknown how vicariance has affected belowground biodiversity, especially process-based beta diversity. Here, we relate beta diversity of soil oribatid mite (Oribatida, Acari) assemblages to geographic distance as well as climatic and soil factors to explore the factors shaping the diversity of oribatid mites across eleven regions of the Indo-Australian Archipelago.</p> <p><strong>Location</strong><strong>:</strong> Indo-Australian Archipelago.</p> <p><strong>Time Period:</strong> Present.</p> <p><strong>Major taxa studied:</strong> Oribatida, Acari.</p> <p><strong>Methods</strong><strong>:</strong> We compiled a list of 2,549 oribatid mite species in the Indo-Australian Archipelago and investigated the level of endemism and beta diversity of oribatid mites in the eleven regions at species, genus and family level. We then summarized the biogeographical dissimilarity patterns of oribatid mites using ordination and clustering methods, and compared the patterns with the zoological boundaries based on aboveground taxa such as the Wallace's, Lydekker's, Weber's and Holt's line. We integrated data on geography, climate and soil to reveal the key drivers of species compositional dissimilarity of oribatid mites among regions using Mantel tests.</p> <p><strong>Results:</strong> Generally, the level of endemism of oribatid mite assemblages in the eleven regions was high; they formed three groups (west of New Guinea, New Guinea and south of New Guinea) with dissimilarity changing from northwest to southeast. The patterns reflect and integrate the lines of Weber, Lydekker and Holt. Species turnover generally correlated with geographic distance reflecting the critical role of vicariance in dispersal-limited oribatid mites.</p> <p><strong>Main conclusions</strong><strong>:</strong> Our results, for the first time, demonstrate contrasting patterns in below- and aboveground organisms in the Indo-Australian Archipelago, and elucidate how geographic distance-based vicariance has structured soil animal diversity in this biodiversity hotspot region.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_13999220 |
| institution | Zenodo |
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| publishDate | 2025 |
| publisher | Zenodo |
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| spellingShingle | The key role of vicariance for soil animal biogeography in a biodiversity hotspot region Pan, Xue Kreft, Holger Lu, Jing-Zhong Du, Yabin Scheu, Stefan Maraun, Mark beta diversity climatic and soil factors geological vicariance Indo-Australian archipelago Oribatida Wallace's Line <p><strong>Aim</strong>: The Indo-Australian Archipelago is known as a biodiversity hotspot with a high level of endemism typically ascribed to vicariance as reflected by the "Wallace's line". However, it is unknown how vicariance has affected belowground biodiversity, especially process-based beta diversity. Here, we relate beta diversity of soil oribatid mite (Oribatida, Acari) assemblages to geographic distance as well as climatic and soil factors to explore the factors shaping the diversity of oribatid mites across eleven regions of the Indo-Australian Archipelago.</p> <p><strong>Location</strong><strong>:</strong> Indo-Australian Archipelago.</p> <p><strong>Time Period:</strong> Present.</p> <p><strong>Major taxa studied:</strong> Oribatida, Acari.</p> <p><strong>Methods</strong><strong>:</strong> We compiled a list of 2,549 oribatid mite species in the Indo-Australian Archipelago and investigated the level of endemism and beta diversity of oribatid mites in the eleven regions at species, genus and family level. We then summarized the biogeographical dissimilarity patterns of oribatid mites using ordination and clustering methods, and compared the patterns with the zoological boundaries based on aboveground taxa such as the Wallace's, Lydekker's, Weber's and Holt's line. We integrated data on geography, climate and soil to reveal the key drivers of species compositional dissimilarity of oribatid mites among regions using Mantel tests.</p> <p><strong>Results:</strong> Generally, the level of endemism of oribatid mite assemblages in the eleven regions was high; they formed three groups (west of New Guinea, New Guinea and south of New Guinea) with dissimilarity changing from northwest to southeast. The patterns reflect and integrate the lines of Weber, Lydekker and Holt. Species turnover generally correlated with geographic distance reflecting the critical role of vicariance in dispersal-limited oribatid mites.</p> <p><strong>Main conclusions</strong><strong>:</strong> Our results, for the first time, demonstrate contrasting patterns in below- and aboveground organisms in the Indo-Australian Archipelago, and elucidate how geographic distance-based vicariance has structured soil animal diversity in this biodiversity hotspot region.</p> |
| title | The key role of vicariance for soil animal biogeography in a biodiversity hotspot region |
| topic | beta diversity climatic and soil factors geological vicariance Indo-Australian archipelago Oribatida Wallace's Line |
| url | https://doi.org/10.5281/zenodo.13999220 |