Collaborative Research: Testing Mechanisms of Microgeographic Adaptation

合作研究:微观地理适应的测试机制

基本信息

  • 批准号:
    1754821
  • 负责人:
  • 金额:
    $ 84.92万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2018
  • 资助国家:
    美国
  • 起止时间:
    2018-08-01 至 2024-07-31
  • 项目状态:
    已结题

项目摘要

One goal of evolutionary ecology is to understand the processes that lead to species becoming better adapted to their local environment. Studies of local adaptation have historically focused on geographically separated populations, where adaptive differences are maintained by limited dispersal of individuals between populations. Growing evidence, however, suggests that adaptive evolution can occur over small spatial distances. How this fine scale, adaptation arises and is maintained remains unresolved, despite applications for human health, agriculture, and biodiversity. On Santa Cruz Island, the Island Scrub Jay has two morphologies. Birds in pine habitat have long and thin beaks where as those in oak habitats have short and deep beaks. These differences are known to facilitate feeding on pine cones versus acorns, but how such adaptive genetic differences are maintained over very small geographic distances is unknown. The researchers will collect data on the genomes of individuals from both types of habitats to test if the same set of genes are differentiated between pine and oak populations, and how other regions of the genome change spatially across the island. These measurements will be coupled with telemetry studies that track how birds move and use oak and pine habitats. In addition, vocal experiments will test if males prefer females that originate within their habitat. The data obtained from this work will then be used to develop general models that can inform the conditions under with adaptive differences in can occur. Such models would be of interest to conservation managers that manage this and other unique or rare species. Additionally, the project will produce a learning module for high school classroom use, and will provide research opportunities for both undergraduate and graduate students. Cases of microgeographic adaptation challenge classical evolutionary theory that posits adaptive divergence should be constrained by gene flow, leading to a reassessment of the spatial scale at which evolutionary processes occur. The research team has recently discovered replicated, adaptive divergence in jay bill shape in adjacent oak and pine habitats, despite gene flow between these adjacent habitats. This pattern occurs across habitats separated by less than one kilometer. The researchers will test alternative hypotheses about how divergent selection, dispersal, and non-random mating shape adaptive divergence in bill morphology. In Aim 1, they develop population genetic models that test the interacting effects of selection, gene flow, assortative mating, and genetic architecture at different spatial scales. In Aim 2, they will test for divergent selection by measuring selection gradients, examining patterns of genomic divergence, and by identifying candidate genes associated with variation in bill morphology. In Aim 3, they will use a combination of population genomics, telemetry, and transplant experiments to test for population genomic structure and if dispersal is non-random In Aim 4, they will test if divergence in bill morphology is correlated with vocalizations and facilitates assortative mating. Collectively, the proposed work takes an integrative approach in a tractable study system. This research has broad implications for understanding both the spatial scale at which adaptive divergence occurs, and the conditions that allow individuals within a single population to diverge across heterogeneous habitats.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.
进化生态学的一个目标是了解导致物种更好地适应当地环境的过程。 地方适应性的研究历来集中在地理上分离的种群,其中适应性差异是由种群之间的个体有限的分散来维持的。然而,越来越多的证据表明,适应性进化可以发生在小的空间距离。这种精细的尺度,适应如何产生和维持仍然没有解决,尽管应用于人类健康,农业和生物多样性。在圣克鲁斯岛上,岛灌丛鸦有两种形态。松树栖息地的鸟类有长而细的喙,而橡树栖息地的鸟类有短而深的喙。已知这些差异有助于以松果和橡子为食,但这种适应性遗传差异如何在非常小的地理距离内保持尚不清楚。研究人员将收集来自这两种栖息地的个体的基因组数据,以测试相同的基因组是否在松树和橡树种群之间存在差异,以及基因组的其他区域如何在整个岛屿上发生空间变化。这些测量将与跟踪鸟类如何移动和使用橡树和松树栖息地的遥测研究相结合。此外,声音实验将测试雄性是否更喜欢来自其栖息地的雌性。然后,从这项工作中获得的数据将用于开发通用模型,这些模型可以告知可能发生适应性差异的条件。这些模型将对管理这种物种和其他独特或稀有物种的保护管理人员感兴趣。此外,该项目将产生一个高中课堂使用的学习模块,并将为本科生和研究生提供研究机会。微地理适应的案例挑战了经典的进化理论,即假定适应性分歧应受到基因流的约束,导致对进化过程发生的空间尺度的重新评估。该研究小组最近发现,尽管基因在这些相邻的栖息地之间流动,但在相邻的橡树和松树栖息地中,松鸦的喙形状存在复制和适应性差异。这种模式发生在相隔不到一公里的栖息地。研究人员将测试关于不同的选择,传播和非随机交配形状在法案形态适应分歧的替代假设。在目标1中,他们开发了群体遗传模型,以测试选择,基因流,选择性交配和遗传结构在不同空间尺度上的相互作用。在目标2中,他们将通过测量选择梯度、检查基因组趋异模式以及识别与票据形态变异相关的候选基因来测试趋异选择。在目标3中,他们将使用人口基因组学,遥测和移植实验的组合来测试人口基因组结构,如果扩散是非随机的。总的来说,拟议的工作需要一个易于处理的研究系统的综合方法。这项研究对理解适应性分化发生的空间尺度以及允许单个种群中的个体在异质栖息地分化的条件具有广泛的影响。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。

项目成果

期刊论文数量(5)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Evolutionary conservatism will limit responses to climate change in the tropics
  • DOI:
    10.1098/rsbl.2021.0363
  • 发表时间:
    2021-10-06
  • 期刊:
  • 影响因子:
    3.3
  • 作者:
    Linck, Ethan B.;Freeman, Benjamin G.;Ghalambor, Cameron K.
  • 通讯作者:
    Ghalambor, Cameron K.
The crucial role of genome-wide genetic variation in conservation
Lack of avian predators is associated with behavioural plasticity in nest construction and height in an island songbird
  • DOI:
    10.1016/j.anbehav.2022.08.017
  • 发表时间:
    2022-12
  • 期刊:
  • 影响因子:
    2.5
  • 作者:
    Sarah C. Hays;Rebecca Cheek;James C. Mouton;T. Sillett;C. Ghalambor
  • 通讯作者:
    Sarah C. Hays;Rebecca Cheek;James C. Mouton;T. Sillett;C. Ghalambor
Body size is associated with yearling breeding and extra-pair mating in the Island Scrub-Jay
岛屿灌丛松鸦的体型大小与一岁繁殖和配对外交配有关
  • DOI:
    10.1093/ornithology/ukab045
  • 发表时间:
    2021
  • 期刊:
  • 影响因子:
    2.3
  • 作者:
    Desrosiers, M. A.
  • 通讯作者:
    Desrosiers, M. A.
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Chris Funk其他文献

Too simple, too complex, or just right? Advantages, challenges and resolutions for indicators of genetic diversity
太简单、太复杂还是恰到好处?
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
    ●. Belma;Kalamujić Stroil;L. Laikre;Alicia Mastretta;Katie Millette;Ivan Paz‐Vinas;Lucia Ruiz Bustos;Robyn E. Shaw;Cristiano Vernesi;Chris Funk;C. Grueber;Francine Kershaw;Anna J. MacDonald;Mariah H. Meek;Cinnamon S. Mittan;David O'Brien;Rob Ogden;G. Segelbacher
  • 通讯作者:
    G. Segelbacher
High resolution climate change observations and projections for the evaluation of heat-related extremes
用于评估与热相关极端事件的高分辨率气候变化观测和预测
  • DOI:
    10.1038/s41597-024-03074-w
  • 发表时间:
    2024-03-01
  • 期刊:
  • 影响因子:
    6.900
  • 作者:
    Emily Williams;Chris Funk;Pete Peterson;Cascade Tuholske
  • 通讯作者:
    Cascade Tuholske
Does humidity matter? Prenatal heat and child health in South Asia
湿度重要吗?
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Kathryn McMahon;Kathy Baylis;Stuart Sweeney;Chris Funk
  • 通讯作者:
    Chris Funk
SSEBop Evapotranspiration Estimates Using Synthetically Derived Landsat Data from the Continuous Change Detection and Classification Algorithm
使用连续变化检测和分类算法合成的陆地卫星数据进行 SSEBop 蒸散量估算
  • DOI:
    10.3390/rs16071297
  • 发表时间:
    2024
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Mikael P. Hiestand;H. Tollerud;Chris Funk;G. Senay;Kate C. Fickas;M. Friedrichs
  • 通讯作者:
    M. Friedrichs
Warming accelerates global drought severity
气候变暖加剧了全球干旱的严重性
  • DOI:
    10.1038/s41586-025-09047-2
  • 发表时间:
    2025-06-04
  • 期刊:
  • 影响因子:
    48.500
  • 作者:
    Solomon H. Gebrechorkos;Justin Sheffield;Sergio M. Vicente-Serrano;Chris Funk;Diego G. Miralles;Jian Peng;Ellen Dyer;Joshua Talib;Hylke E. Beck;Michael B. Singer;Simon J. Dadson
  • 通讯作者:
    Simon J. Dadson

Chris Funk的其他文献

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{{ truncateString('Chris Funk', 18)}}的其他基金

Collaborative Research: RAPID: Testing the Mechanisms and Consequences of an Adaptive Response to a Catastrophic Fire and Heatwave in Stream Frogs
合作研究:RAPID:测试溪流青蛙对灾难性火灾和热浪的适应性响应的机制和后果
  • 批准号:
    2221809
  • 财政年份:
    2022
  • 资助金额:
    $ 84.92万
  • 项目类别:
    Standard Grant
RoL: FELS: EAGER: Landscape Phenomics: Predicting vulnerability to climate variation by linking environmental heterogeneity to genetic and phenotypic variation
RoL:FELS:EAGER:景观表型组学:通过将环境异质性与遗传和表型变异联系起来预测气候变化的脆弱性
  • 批准号:
    1838282
  • 财政年份:
    2018
  • 资助金额:
    $ 84.92万
  • 项目类别:
    Standard Grant
DISSERTATION RESEARCH: Harnessing genomics to test the mechanisms causing adaptive phenotypic divergence along elevational gradients in a poison frog.
论文研究:利用基因组学来测试导致毒蛙沿海拔梯度适应性表型发散的机制。
  • 批准号:
    1601780
  • 财政年份:
    2016
  • 资助金额:
    $ 84.92万
  • 项目类别:
    Standard Grant
DISSERTATION RESEARCH: Temporal Sampling and DNA Metabarcoding to Test the Climate Variability Hypothesis
论文研究:时间采样和 DNA 元条形码来检验气候变异假说
  • 批准号:
    1502008
  • 财政年份:
    2015
  • 资助金额:
    $ 84.92万
  • 项目类别:
    Standard Grant
How Does Gene Flow Affect Local Adaptation and Population Dynamics?: Experimental Tests in Wild Populations and Mesocosms
基因流如何影响局部适应和种群动态?:野生种群和中生态系统的实验测试
  • 批准号:
    1146489
  • 财政年份:
    2012
  • 资助金额:
    $ 84.92万
  • 项目类别:
    Standard Grant

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