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Testing for the stages of vertebrate radiation using freshwater fishes of the family Percidae

使用鲈科淡水鱼测试脊椎动物辐射的阶段

基本信息

批准号：
2135927
负责人：
Jessica Arbour
金额：
$ 26.37万
依托单位：
Middle Tennessee State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2022
资助国家：
美国
起止时间：
2022-02-01 至 2025-01-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2135927&HistoricalAwards=false
关键词：
Testing stages vertebrate radiation using

项目摘要

Understanding why some groups of organisms are made up of species of many different shapes and sizes, while others are not, is a key goal of evolutionary biology. Does morphological diversity arise in a sudden burst of evolution, or does it accumulate gradually? The gradual model of adaptive radiation hypothesizes that organisms first diversify in traits to explore new habitats, then to feed on different resources, and lastly to communicate reproductive fitness. However, few rigorous quantitative tests of this model have been performed, and mostly on unique, island-based radiations. This project will test this model of diversification using the family Percidae (e.g., perches, walleye and darters), one of the most diverse families of freshwater fishes in the USA. This research will use advanced 3D imaging techniques to create a comprehensive database of traits linked to habitat, diet and communication and analyses to better understand how and when these traits evolved during the history of Percidae. This work will also expand an open access digital library of fish anatomical diversity, contribute to local ichthyology courses, expand a Natural History Center’s aquatic exhibit space, and train undergraduate and graduate students in fish biology, evolution and statistical programming.This project seeks to test Streelman and Danley’s “three stages of vertebrate radiation” using rigorous phylogenetic comparative methods and comprehensive datasets of ecologically-linked phenotypic characters within percid fishes. The project will use non-destructive 3D imaging (e.g., laser scanning, micro-CT, dice-CT) of field-collected and museum-preserved specimens, including extensive taxonomic sampling across the family Percidae. Phylogenetic comparative methods will be used to test for peaks in the diversification of these trait complexes using a newly published all-Percid phylogeny. The researchers will investigate how the evolutionary lability of these trait axes has been impacted by intrinsic mechanisms such as allometry, modularity or biomechanical/constructional constraints, and whether this contributes to a hierarchical pattern of trait evolution. Lastly, the researchers will test for an association between each trait axis and speciation rates. This work will help to elucidate the macroevolutionary drivers of biodiversity, and enhance our understanding of the contributions of selection and adaptation to trait diversity.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

理解为什么某些生物群是由许多不同形状和大小的物种组成的，而另一些则不是，这是进化生物学的一个关键目标。形态多样性是在进化的突然爆发中产生的，还是逐渐积累的？适应性辐射的渐进模型假设生物首先在性状上多样化以探索新的栖息地，然后以不同的资源为食，最后是交流生殖适合度。然而，很少有严格的定量测试，这个模型已经进行，主要是在独特的，基于岛屿的辐射。本项目将使用Percusae科（例如，鲈鱼、大眼鱼和镖鲈），是美国淡水鱼中最多样化的家族之一。这项研究将使用先进的3D成像技术来创建一个与栖息地，饮食和交流相关的特征的综合数据库，并进行分析，以更好地了解这些特征在Permusae历史上如何以及何时进化。这项工作还将扩大鱼类解剖多样性的开放式数字图书馆，为当地鱼类学课程做出贡献，扩大自然历史中心的水生展览空间，并培训鱼类生物学的本科生和研究生，进化和统计编程。该项目旨在测试Streelman和Danley的“脊椎动物辐射的三个阶段”，使用严格的系统发育比较方法和生态学的综合数据集-鲈形目鱼类的连锁表型性状。该项目将使用非破坏性3D成像（例如，激光扫描，显微CT，切片CT）的现场收集和博物馆保存的标本，包括广泛的分类学采样在家庭Permusae。系统发育比较方法将被用来测试峰的多样化，这些特征的复合体使用新出版的所有Percid系统发育。研究人员将研究这些性状轴的进化不稳定性如何受到异速生长、模块化或生物力学/结构约束等内在机制的影响，以及这是否有助于性状进化的层次模式。最后，研究人员将测试每个特征轴与物种形成率之间的关联。这项工作将有助于阐明生物多样性的宏观进化驱动力，并提高我们对选择和适应对性状多样性的贡献的理解。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估来支持。