DISSERTATION RESEARCH: The Consequences of Global Events on Vertebrate Biodiversity: the Paleozoic Actinopterygian Radiation

论文研究：全球事件对脊椎动物生物多样性的影响：古生代放线鱼辐射

• 批准号: 1011002
• 负责人: Michael Coates
• 金额: $ 1.5万
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-06-01 至 2012-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1011002&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Consequences; Global; Events

Global events such as mass extinctions have lasting impacts on biodiversity: Actinopterygians (ray-finned fishes) are currently the most abundant and diverse group of living vertebrates; however, this situation only arose after previously dominant groups suffered major losses coincident with the Paleozoic Hangenberg mass extinction event. This project will examine whether: (1) the Hangenberg extinction event, associated with climatic changes, permanently restructured global vertebrate biodiversity; (2) actinopterygians underwent a large-scale radiation after an extinction bottleneck; (3) actinopterygian diversification occurred in response to vacated niches in post-extinction ecosystems, leading to the widespread evolution of novel functional morphologies. This project will assemble comprehensive vertebrate occurrence databases, reconstruct new phylogenies, and analyze the occupation/reoccupation of vertebrate morphospace. Investigation of actinopterygian evolution is vital for interpreting current vertebrate biodiversity because these fishes are a major component of modern ecosystems. Phylogenetic, morphological, and diversity data will be placed in open repositories, providing starting points for further studies of vertebrate macroevolution. The results will be valuable for designing science curricula and other accessible programs because of paleontology's broad appeal - instilling in the general public an appreciation for broader concepts including evolution, biodiversity loss and turnover, and large-scale global change.

大规模灭绝等全球事件对生物多样性产生持久影响：放线鱼（射线鳍鱼）是目前现存脊椎动物中数量最多、种类最多的；然而，这种情况是在古生代汉根堡大规模灭绝事件期间，先前占主导地位的群体遭受重大损失之后才出现的。该项目将研究：（1）与气候变化相关的汉根堡灭绝事件是否永久性地重组了全球脊椎动物的生物多样性； （2）放线鱼在经历了灭绝瓶颈后经历了大规模的辐射； （3）放线翅目多样化是为了响应灭绝后生态系统中空出的生态位，导致新的功能形态的广泛进化。该项目将收集全面的脊椎动物发生数据库，重建新的系统发育，并分析脊椎动物形态空间的占据/再占据。放线鱼进化的研究对于解释当前脊椎动物的生物多样性至关重要，因为这些鱼类是现代生态系统的主要组成部分。系统发育、形态学和多样性数据将被放置在开放存储库中，为脊椎动物宏观进化的进一步研究提供起点。由于古生物学具有广泛的吸引力，这些结果对于设计科学课程和其他可访问的项目非常有价值——向公众灌输对更广泛概念的理解，包括进化、生物多样性丧失和更替以及大规模的全球变化。