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Understanding dispersal potential in climate-sensitive species

了解气候敏感物种的扩散潜力

基本信息

批准号：
2889843
负责人：
金额：
--
依托单位：
University of Cambridge
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2023
资助国家：
英国
起止时间：
2023 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2889843
关键词：
Understanding dispersal potential climate sensitive

项目摘要

This project aims to investigate the genomic and demographic effects ofclimatic changes during large-scale geographic postglacial recolonisationusing V. berus as a study model. This will allow us to assess the mechanismsunderlying previous demographic changes, and most importantly, to predictthe effect of climate change on the population demography of a decliningspecies. The common adder is characterised by the largest geographic rangeamong terrestrial snakes, which encompasses most of the Eurasiancontinent. Despite this taxon being characterised by low dispersal abilitiesand high philopatry, previous studies based on mtDNA have suggested aninitial continental recolonisation event around a million years ago,subsequently followed by minor colonisation events during the Lower-MidPleistocene glacial cycles. Although, the use of a single locus and the lack ofspatial/climatic hypothesis testing frameworks, may provide weak support.This project exploits Climate-Informed Spatial Genetic Modelling to test suchrecolonisation hypotheses. The complex and diverse biogeographic history ofthe common adder makes this taxon the perfect subject to investigate thecauses responsible for recurrent range expansion events. Whole-genomesequencing data from specimens across the distributional range will be usedto confirm demographic predictions and evaluate genomic regions underselection in order to assess the potential of populations to cope with futureclimatic scenarios.

本项目旨在以贝氏弧菌为研究模型，研究大规模地理后冰期再殖民过程中气候变化的基因组和人口统计学效应。这将使我们能够评估以前人口变化背后的机制，最重要的是，预测气候变化对正在减少的物种的人口统计学的影响。常见的加法器的特点是陆生蛇的地理范围最大，它覆盖了欧亚大陆的大部分地区。尽管该分类群具有低扩散能力和高亲水性的特点，但先前基于mtDNA的研究表明，大约100万年前发生了最初的大陆重新殖民事件，随后在下-中更新世冰川旋回期间发生了较小的殖民事件。然而，单基因座的使用和空间/气候假设检验框架的缺乏可能提供微弱的支持。该项目利用气候信息空间遗传模型来测试这样的重新殖民假设。普通加法器复杂多样的生物地理史使这个分类单元成为研究反复发生的范围扩大事件的原因的完美对象。将使用分布范围内标本的全基因组测序数据来证实人口预测和评估基因组区域的选择不足，以评估种群应对未来气候情景的潜力。