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Collaborative Research: Species delimitation in North American lizards

合作研究：北美蜥蜴的物种界定

基本信息

批准号：
2024014
负责人：
Luke Frishkoff
金额：
$ 40.69万
依托单位：
University of Texas at Arlington
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-09-01 至 2024-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2024014&HistoricalAwards=false
关键词：
Collaborative Research Species delimitation North

项目摘要

Species are a fundamental unit of diversity in the natural world. Therefore, accurately documenting species diversity has important implications in life sciences, habitat management, and conservation. Yet, despite the importance of species in understanding biodiversity, it is often difficult to identify unambiguous species boundaries in many taxonomic groups. Lizards are one such example of a taxonomic group with genetically-different populations that often look very similar. What appears to be one lizard species is often a species group of several possible lizard species. In this project, the researchers will collaborate with scientists across 15 different institutions to determine species boundaries in 30 species groups of North American lizards. Doing so will (1) connect scientific understandings of how species form to the practice of naming species and (2) model an intellectual and methodological framework for naming species consistently in other taxonomic groups. The researchers will share their research findings at community events across three metropolitan regions, engage undergraduate students in authentic research, and guide taxonomic revisions to promote stable species names.This project will use an integrative approach to delimit species. First, the project team will collaborate with taxonomic experts to generate range-wide genetic, ecological, and morphological sampling for each focal species group. These data will then be analyzed consistently to characterize levels of genetic and phenotypic divergence within each species complex. Then, the project team will assay levels of reproductive isolation between candidate species by using genetic data to measure the extent of hybridization and introgression between them. By comparing data on divergence and isolation, the team will characterize the rate and pace at which reproductive isolation evolves. Using these estimates, the team will then define the population-species boundary and apply it to the 30 focal groups to identify taxonomic units that show the highest levels of durability through time. Finally, using the revised taxonomy, the team will evaluate species delimitation methods that define taxonomic units based solely on genetic data. While efficient, these methods can be biased, and this analysis will identify the potential causes for these biases.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.

物种是自然界多样性的基本单位。因此，准确记录物种多样性在生命科学、栖息地管理和保护方面具有重要意义。然而，尽管物种在理解生物多样性方面很重要，但在许多分类群中往往很难确定明确的物种边界。蜥蜴就是这样一个分类群体的例子，它们具有遗传上不同的种群，通常看起来非常相似。看起来是一种蜥蜴的物种，往往是由几种可能的蜥蜴物种组成的物种群。在这个项目中，研究人员将与15个不同机构的科学家合作，确定北美蜥蜴30个物种群体的物种边界。这样做将(1)将对物种如何形成的科学理解与命名物种的实践联系起来，(2)为在其他分类类群中一致地命名物种建立一个智力和方法框架。研究人员将在三个大都市地区的社区活动中分享他们的研究成果，让本科生参与真实的研究，并指导分类学修改以促进稳定的物种名称。这个项目将使用综合方法来界定物种。首先，项目团队将与分类学专家合作，为每个重点物种组生成范围广泛的遗传、生态和形态样本。然后将对这些数据进行一致的分析，以表征每个物种复合体中遗传和表型差异的水平。然后，项目团队将通过使用遗传数据来测量候选物种之间的杂交和导入程度，从而测试候选物种之间的生殖隔离水平。通过比较分化和隔离的数据，研究小组将描述生殖隔离演变的速度和速度。使用这些估计，研究小组将定义种群-物种边界，并将其应用于30个焦点小组，以确定显示出经久不衰的最高水平的分类单位。最后，使用修订后的分类学，该团队将评估仅基于遗传数据定义分类单位的物种划分方法。这些方法虽然有效，但可能存在偏见，本分析将找出造成这些偏见的潜在原因。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。