Comparative Biogeography of the Lesser Sunda Islands of Indonesia: Diversification Across a Wallacean Two-Way Filter Barrier

印度尼西亚小巽他群岛的比较生物地理学：跨越华莱士双向过滤屏障的多样化

• 批准号: 1258185
• 负责人: Jimmy McGuire
• 金额: $ 49.5万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-02-01 至 2017-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1258185&HistoricalAwards=false
• 关键词: Comparative; Biogeography; Lesser; Sunda; Islands

The Lesser Sunda Archipelago occurs as a double arc of islands extending between Java and Bali in the west and New Guinea in the east. This is one of the most geologically active and tectonically complex regions in the world. The Lesser Sundas may act as "stepping stones" between the Sunda Shelf (Malay Peninsula, Borneo, Sumatra, Java, and Bali) and Sahul Shelf (New Guinea, Australia), thereby forming a two-way filter for organisms dispersing between two of the world's great biogeographical realms, Asia and Australo-Papua. This study investigates speciation and biogeography of this region by applying phylogenetic and biogeographic methodologies, along with coalescent-based population genetic approaches. The study is comparative, investigating 12 amphibian and reptile species complexes.Novel to this program is the development of 200 nuclear DNA loci for each focal taxon using a bait-capture approach that harnesses the power of Next-Gen DNA sequencing. Loci will be analyzed using phylogenetic and population genetic methods to evaluate broad biogeographic patterns across SE Asia, patterns of diversification thoughout the Lesser Sundas, gene flow at lineage boundaries, and to estimate divergence times for speciation events within the archipelago. Results will inform Indonesian agencies tasked with protecting areas of endemism in this Global Conservation hotspot.

小巽他群岛位于爪哇和巴厘岛的西部和新几内亚的东部之间，呈双弧状。这是世界上地质最活跃、构造最复杂的地区之一。小巽他群岛可以作为巽他大陆架（马来半岛、婆罗洲、苏门答腊、爪哇和巴厘岛）和萨胡尔大陆架（新几内亚、澳大利亚）之间的“垫脚石”，从而形成一个双向过滤器，让生物在世界上两个伟大的生物地理领域——亚洲和澳大利亚-巴布亚之间传播。本研究采用系统发育和生物地理学方法，以及基于聚结的种群遗传学方法，对该地区的物种形成和生物地理学进行了研究。这项研究是比较的，调查了12种两栖动物和爬行动物。该计划的新颖之处在于，利用利用下一代DNA测序技术的诱饵捕获方法，为每个焦点分类单元开发200个核DNA位点。将使用系统发育和种群遗传方法分析位点，以评估整个东南亚的广泛生物地理模式，整个小星期天的多样化模式，谱系边界的基因流动，并估计群岛内物种形成事件的分化时间。结果将通知负责保护这一全球保护热点地区特有地区的印度尼西亚机构。