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Testing biogeographic hypotheses in Wallacea using freshwater molluscs

使用淡水软体动物测试华莱士的生物地理学假设

基本信息

批准号：
58037499
负责人：
Professor Dr. Christian Albrecht
金额：
--
依托单位：
Museum für Naturkunde - Leibniz-Institut für Evolutions- und Biodiversitätsforschung (MfN)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2007
资助国家：
德国
起止时间：
2006-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/58037499?language=en
关键词：
Testing biogeographic hypotheses Wallacea using

项目摘要

The biogeography of the oceanic island region called Wallacea between the Asian and Australiancontinental shelves has been controversely discussed for almost 150 years. The geology of the regionis extremely complex and an Australian origin of some parts of the Indonesian island Sulawesi inparticular is generally assumed. Specifically, some taxa of Sulawesi are believed to have arrived oncontinental fragments (terranes) from Australia. This intriguing assumption has never been rigorouslytested, though. Geologists disagree on whether these terranes were submerged during their drift fromAustralia, and from a biological perspective most groups are not suited for respective analyses, as thealternative hypothesis of oceanic or airborne dispersal can often not be rejected. We aim to usemolecular phylogenies of several freshwater gastropod taxa to (i) seek the first conclusive evidence foran Australian origin of groups with a notoriously poor dispersal potential on Sulawesi and (ii) to apply amolecular clock approach in order to correlate the arrival of these gastropods on the island with theage of the candidate terranes, and thus identify the most likely terrane. The outcome of this project isexpected to provide a general contribution to the highly complex biogeography of the region and mayalso yield interdisciplinary insights for geologists by indicating the probabality of a subaerial drift ofcertain terranes.

关于位于亚洲和澳大利亚大陆架之间的海洋岛屿地区的生物地理学，人们争论了近150年。该地区的地质情况极其复杂，特别是印度尼西亚苏拉威西岛的某些部分通常被认为是澳大利亚起源的。具体来说，苏拉威西岛的一些分类群被认为是从澳大利亚到达大陆碎片（地体）的。然而，这个有趣的假设从未经过严格的检验。地质学家对这些地形是否在从澳大利亚漂流而来的过程中被淹没持不同意见，从生物学的角度来看，大多数小组都不适合进行各自的分析，因为海洋或空气传播的另一种假设往往不能被拒绝。我们的目标是利用几个淡水腹足动物类群的分子系统发育来(i)寻求澳大利亚起源的第一个确凿证据，这些群体在苏拉威西岛的扩散潜力非常差；（ii）应用分子时钟方法，以便将这些腹足动物在岛上的到来与候选地层的年龄联系起来，从而确定最有可能的地层。该项目的结果预计将为该地区高度复杂的生物地理学提供一般性的贡献，并可能通过指示某些地形的地面漂移的可能性，为地质学家提供跨学科的见解。