The evolutionary consequences of environmental uncertainty
环境不确定性的进化后果
基本信息
- 批准号:RGPIN-2021-03832
- 负责人:
- 金额:$ 2.91万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2021
- 资助国家:加拿大
- 起止时间:2021-01-01 至 2022-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Natural environments are continually changing, which is known to cause sometimes extreme variation in evolutionary fitness. Existing species are the few representatives of survivors of all environments to the present time. The ultimate goal of this NSERC-supported research program is to contribute to an understanding of how organisms evolve in the face of continual change. It addresses fundamental questions, but has broad applicability. For example, evolution of infectious disease-causing microbes is a story of adaptation to changing host environments. There are three main ways in which organisms respond to change: 1) by adaptively "tracking" changing environments, 2) through "plastic" adjustments within a lifetime, and 3) by evolving "bet-hedging" traits that reduce risk of complete failure. Little is known about the relative importance of these three forms of response, how they interact to influence success, or the time scales over which they evolve. The research supported by this NSERC Discovery Grant takes theoretical, observational and experimental approaches conducted both in the lab and the field to advance understanding of organismal response to changing environments. The first study uses computation and experiments to ask how the evolution of so-called bet hedging is even possible. By definition, bet-hedging traits are advantageous over long time periods, but are detrimental during "normal" times. One PhD student aims to discover the genetic basis of not "un-evolving" the detrimental bet-hedging trait during normal times; another will build a computational model to ask about the evolution of such constraints over longer time periods. A second set of projects uses the herbaceous plant, Lobelia inflata, to ask questions about the mechanisms responsible for expression of traits underlying fitness. For example, how did the self-fertilizing mating system in L. inflata evolve from outcrossing? This question will be addressed by comparing this species with closely related outcrossing species, and through citizen science (iNaturalist) photographic evidence of geographical differences in mating systems of L. inflata across eastern N.A. The third set of projects focuses on the tiny floating aquatic plant, Spirodela polyrhiza, unique in producing hardy seed-like "turions" that sink to the sediment, allowing survival despite the unpredictable onset of winter. The timing of reactivation from the sediment in the spring is influenced by a diversified risk-spreading strategy, and this strategy differs genetically among populations. This plant offers the opportunity to ask fundamental questions about the importance of diversification for survival, and also about "eco-evolutionary dynamics": the effect of genetic differences in diversification on the outcome of competitive interactions among species. This research will contribute to fundamental knowledge of organismal response to environmental variance, including extinction resistance.
自然环境是不断变化的,这是众所周知的,有时会导致极端变化的进化适应性。现存物种是迄今为止所有环境中幸存者的少数代表。这个NSERC支持的研究计划的最终目标是帮助了解生物体如何在不断变化的情况下进化。它涉及基本问题,但具有广泛的适用性。例如,引起传染病的微生物的进化是一个适应不断变化的宿主环境的故事。生物体对变化的反应主要有三种方式:1)通过适应性地“跟踪”变化的环境,2)通过一生中的“可塑性”调整,3)通过进化“对冲”特征来降低完全失败的风险。关于这三种反应形式的相对重要性,它们如何相互作用以影响成功,或者它们演变的时间尺度,我们知之甚少。这项由NSERC发现资助支持的研究采用了在实验室和现场进行的理论,观察和实验方法,以促进对生物体对不断变化的环境的反应的理解。 第一项研究使用计算和实验来询问所谓的赌注对冲的进化是如何可能的。根据定义,下注对冲特征在长时间内是有利的,但在“正常”时期是有害的。一名博士生的目标是发现正常情况下有害的赌注对冲特征不会“不进化”的遗传基础;另一名博士生将建立一个计算模型来询问此类约束在较长时间内的进化。 第二组项目使用草本植物,半边莲膨胀,问的问题,负责表达的特点,潜在的健身机制。例如,L.从异交进化而来?这个问题将通过比较这个物种与密切相关的异交物种,并通过公民科学(iNaturalist)的交配系统的地理差异的摄影证据L。穿越了整个北美东部 第三组项目的重点是微小的漂浮水生植物紫萍,它独特地产生类似于哈代种子的“洋葱”,这些“洋葱”沉入沉积物中,尽管冬季的到来不可预测,但仍能生存。在春季从沉积物中重新激活的时间是由一个多样化的风险传播策略的影响,这种策略在种群之间的遗传差异。这种植物提供了一个机会,问基本问题的重要性,多样化的生存,也对“生态进化动力学”:遗传差异的影响多样化的结果物种之间的竞争相互作用。这项研究将有助于生物体对环境变化的反应的基础知识,包括灭绝抗性。
项目成果
期刊论文数量(0)
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Simons, Andrew其他文献
The environmental performance of current and future passenger vehicles: Life cycle assessment based on a novel scenario analysis framework
- DOI:
10.1016/j.apenergy.2015.01.019 - 发表时间:
2015-11-01 - 期刊:
- 影响因子:11.2
- 作者:
Bauer, Christian;Hofer, Johannes;Simons, Andrew - 通讯作者:
Simons, Andrew
Human health impacts in the life cycle of future European electricity generation
- DOI:
10.1016/j.enpol.2014.03.034 - 发表时间:
2014-12-01 - 期刊:
- 影响因子:9
- 作者:
Treyer, Karin;Bauer, Christian;Simons, Andrew - 通讯作者:
Simons, Andrew
Simons, Andrew的其他文献
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{{ truncateString('Simons, Andrew', 18)}}的其他基金
The evolutionary consequences of environmental uncertainty
环境不确定性的进化后果
- 批准号:
RGPIN-2021-03832 - 财政年份:2022
- 资助金额:
$ 2.91万 - 项目类别:
Discovery Grants Program - Individual
Evolutionary response to environmental uncertainty
对环境不确定性的进化反应
- 批准号:
RGPIN-2015-03922 - 财政年份:2020
- 资助金额:
$ 2.91万 - 项目类别:
Discovery Grants Program - Individual
Evolutionary response to environmental uncertainty
对环境不确定性的进化反应
- 批准号:
RGPIN-2015-03922 - 财政年份:2019
- 资助金额:
$ 2.91万 - 项目类别:
Discovery Grants Program - Individual
Evolutionary response to environmental uncertainty
对环境不确定性的进化反应
- 批准号:
478023-2015 - 财政年份:2019
- 资助金额:
$ 2.91万 - 项目类别:
Discovery Grants Program - Accelerator Supplements
Evolutionary response to environmental uncertainty
对环境不确定性的进化反应
- 批准号:
RGPIN-2015-03922 - 财政年份:2018
- 资助金额:
$ 2.91万 - 项目类别:
Discovery Grants Program - Individual
Evolutionary response to environmental uncertainty
对环境不确定性的进化反应
- 批准号:
RGPIN-2015-03922 - 财政年份:2017
- 资助金额:
$ 2.91万 - 项目类别:
Discovery Grants Program - Individual
Evolutionary response to environmental uncertainty
对环境不确定性的进化反应
- 批准号:
478023-2015 - 财政年份:2017
- 资助金额:
$ 2.91万 - 项目类别:
Discovery Grants Program - Accelerator Supplements
Evolutionary response to environmental uncertainty
对环境不确定性的进化反应
- 批准号:
RGPIN-2015-03922 - 财政年份:2016
- 资助金额:
$ 2.91万 - 项目类别:
Discovery Grants Program - Individual
Evolutionary response to environmental uncertainty
对环境不确定性的进化反应
- 批准号:
RGPIN-2015-03922 - 财政年份:2015
- 资助金额:
$ 2.91万 - 项目类别:
Discovery Grants Program - Individual
Evolutionary implications of fluctuating natural selection
波动自然选择的进化意义
- 批准号:
238387-2010 - 财政年份:2014
- 资助金额:
$ 2.91万 - 项目类别:
Discovery Grants Program - Individual
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