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。印度尼西亚的华莱士线和其他边界在生物地理上划分了它的群岛，是一个介于东方和澳大利亚地区之间的超级多样化的动物（和植物区系）过渡区。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上形成的？生物群从何而来？构造事件和气候变化在其中扮演着怎样的相对角色？在这里，潜水甲虫是我们基于物种丰富（该地区约700种）和生态多样化的水生动物群来全面解决这些问题的代理。我们使用基于DNA序列数据的系统发育树。在这里，我们将重点放在印度尼西亚群岛上，并建立一个现有的澳大利亚和美拉尼西亚潜水甲虫的大型数据集，以及该家族的现有全球数据集。基于这种全面的抽样，我们将能够揭示哪些进化和环境过程对动物多样性做出了贡献，从本质上测试岛屿生物多样性的预测。我们以前已经能够证明一些群体表现出惊人的复杂的分散模式，例如在过去的700万年里，在印度尼西亚群岛上来回走动，并且预计复杂的模式比以前认为的更普遍。

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.