Evolution and Biogeography in the Indomalayan-Melanesian-Oceanian region - part 2

东南亚大陆和大洋洲之间的地区在生物和地质上非常多样化。印度尼西亚，华莱士线和其他边界划分其群岛地理，是一个巨大的多样性动物区系（和植物区系）之间的过渡带东方和澳大利亚地区。宏观进化的核心问题是：如此多样的生物群是如何在空间和时间中形成的，生物群来自哪里，构造事件和气候变化扮演了哪些相对角色？在这里，潜水甲虫是我们的代理，以全面解决这些问题的基础上，物种丰富（超过700种在该地区）和生态多样性的水生动物群。我们使用基于DNA序列数据的系统发育树。在这里，我们专注于印度尼西亚群岛，并建立在澳大利亚和美拉尼西亚潜水甲虫的大型现有数据集和现有的全球数据集的家庭。根据这一全面的取样，我们将能够揭示哪些进化和环境过程促成了动物群的多样性，基本上是对岛屿生物多样性的预测进行测试。我们之前已经能够证明，一些群体表现出令人惊讶的复杂分散模式，例如在过去的<700万年里在印度尼西亚群岛来回移动，并预计复杂的模式比以前认为的更常见。

The region between mainland Southeast Asia and Oceania is biologically and geologically very diverse. Indonesia, with the Wallace line and other boundaries dividing its archipelago biogeographically, is a megadiverse faunistic (and floristic) transition zone between the Oriental and Australian regions. Central macroevolutionary questions are: How was such diverse biota shaped in space and time, where does biota come from, which relative roles do tectonic events and climatic change play? Here, diving beetles are our proxy to comprehensively address these questions based on a species rich (> 700 species in the region) and ecologically diverse group of aquatic fauna. We use phylogenetic trees based on DNA sequence data. Here, we focus on the Indonesian archipelago and build on a large existing dataset of Australian and Melanesian diving beetles and an existing global data set for the family. Based on this comprehensive sampling, we will be able to reveal which evolutionary and environmental processes have contributed to faunal diversity, essentially testing predictions of island biodiversity. We have previously been able to show that some groups show suprisingly complex dispersal patterns, e.g. back and forth across the Indonesian archipelago over the past <7 million years and expect that complex patterns are more common than previously believed.