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Collaborative Research: SG: Clonality and the scope for adaptation in heterogeneous environments

合作研究：SG：克隆性和异构环境中的适应范围

基本信息

批准号：
1923495
负责人：
Maria Orive
金额：
$ 16.23万
依托单位：
University of Kansas Center for Research Inc
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-07-15 至 2024-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1923495&HistoricalAwards=false
关键词：
Collaborative Research SG Clonality scope

项目摘要

All species exist in a variety of environments. How a species adapts across those environments determines its survival in a particular location. This also determines the species range over time. The type of reproduction shown by an organism can have profound consequences for that adaptation across a varied landscape. One key reproductive mode, partial clonality, which includes both asexual reproduction and sexual reproduction, is found in many organisms. These include species that influence many important ecosystems functions. Partial clonality is also found in many pathogens, pests, and invasive species. This research will develop mathematical models that explore how partial clonality and local environmental variation interact to shape the evolution of such species. The results of this research will help identify key aspects of populations that make them especially vulnerable to changing environmental conditions, leading to population decline and even extinction. Conversely, factors that allow populations to more easily adapt to new environments will also be determined. An important impact of this work is its applicability to our understanding of invasive species and emerging infectious diseases. Broader impacts also include increased mathematical literacy and a better understanding of the linkages between the biological sciences, mathematics, and statistics for both graduate and undergraduate students trained under this project.This study will explore the differences in the average selective regime experienced by clonal verses sexual offspring and how that may influence realized patterns of adaptation across a variable landscape. Of particular interest is the influence on genomic diversity, and a population's ability to persist under environmental change. Two complementary approaches will be utilized to address these complexities: (1) analytical models combining stage-structured life histories and phenotypic evolution and (2) individual-based forward-time simulation models allowing for consideration of important aspects of stochasticity in both evolution and demography will be applied. Together these two modeling methods will clarify the integrated effect of reproductive mode and variable selective environment in shaping the dynamics of speciesThis 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.

所有物种都生活在不同的环境中。一个物种如何适应这些环境决定了它在一个特定地点的生存。这也决定了物种随时间的变化范围。一种生物所表现出的繁殖方式对其在不同环境下的适应性有着深远的影响。一种关键的生殖模式，部分克隆，包括无性生殖和有性生殖，在许多生物中都有发现。这些物种包括影响许多重要生态系统功能的物种。在许多病原体、害虫和入侵物种中也发现了部分克隆。这项研究将建立数学模型，探索部分克隆性和局部环境变化如何相互作用，以塑造这些物种的进化。这项研究的结果将有助于确定种群的关键方面，这些方面使它们特别容易受到不断变化的环境条件的影响，从而导致种群数量下降甚至灭绝。相反，使人口更容易适应新环境的因素也将被确定。这项工作的一个重要影响是它适用于我们对入侵物种和新出现的传染病的理解。更广泛的影响还包括提高数学素养，更好地理解生物科学、数学和统计学之间的联系。本研究将探讨克隆和有性后代在平均选择机制方面的差异，以及这如何影响在不同环境下实现的适应模式。特别令人感兴趣的是对基因组多样性的影响，以及种群在环境变化下的持续能力。将采用两种互补的方法来解决这些复杂性：(1)结合阶段结构生活史和表型进化的分析模型；(2)基于个体的前向时间模拟模型，允许考虑进化和人口统计学中随机性的重要方面。这两种建模方法将共同阐明生殖模式和可变选择环境在塑造物种动态方面的综合影响。该奖项反映了美国国家科学基金会的法定使命，并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，被认为值得支持。