Collaborative Research: ORCC: Investigating drought and cold resistance of northeastern US trees to inform ecological modeling and forest management practices

合作研究:ORCC:调查美国东北部树木的抗旱性和抗寒性,为生态建模和森林管理实践提供信息

基本信息

  • 批准号:
    2222437
  • 负责人:
  • 金额:
    $ 67.05万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2022
  • 资助国家:
    美国
  • 起止时间:
    2022-10-15 至 2025-09-30
  • 项目状态:
    未结题

项目摘要

Climate trends and predictions in the northeastern U.S. include an increase in the frequency of mid-summer droughts. Although forest managers increasingly prioritize climate adaptation and assisted tree migration as management goals, their efforts are limited by information gaps because drought impacts on northeastern trees have not previously been a high research priority. Further, how trees adapt to drought may affect their vulnerability to other stressors such as extreme cold and spring frost damage, factors that will continue to be part of northeastern winters for decades to come. This research will improve understanding of how northeastern tree species respond to drought and how different drought adaptations affect their vulnerability to other climate stressors. This will be achieved by conducting extensive measurements of drought-related plant traits across many species and site conditions in the northeastern U.S. and at a site in Alabama that contains similar species at the southern end of their current range. Data will be collected using a novel method that greatly increases the number of tissue samples that can be processed. Results will be used to improve a forest simulation model that can help forest managers evaluate the outcomes of different management strategies. This work will receive guidance from a stakeholder advisory board consisting of forest managers, conservation groups and others invested in the future well-being of northeastern forests.In the northeastern U.S., climate projections include an increase in the frequency of mid-summer droughts, and winters that are warmer overall, but with periodic infusions of arctic air that can cause late-spring freezes and damaging cold-stress. The ability to predict how forests will respond is limited by knowledge of inter- and intra-specific variation in plant traits that regulate tree responses to climatic stress and the degree to which they reflect environmental or evolutionary drivers. This research addresses these uncertainties by (1) performing an in-depth study of the variation and drivers of turgor loss point—a key determinant of tree-level drought response—as well as associated cold and drought resilience traits and (2) identifying the relationship between drought and cold resilience in the individuals studied. The work will involve extensive field measurements of leaf osmotic potential and turgor loss point, associated physiological plant traits and rooting depth, as well as a manipulative experiment on genetically identical individuals. Sampling will be conducted at sites across the northeastern U.S. and at a site in Alabama with similar species at the southern end of their range. The work will be guided by an advisory board made of people invested in the forest (e.g., forest managers, conservation groups and indigenous community members). Results will be used to improve an ecosystem model that simulates forest growth under a range of climate and forest management scenarios. This will benefit a range of management objectives that prioritize climate resilience and assisted tree migration.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.
美国东北部的气候趋势和预测包括仲夏干旱频率的增加。 虽然森林管理人员越来越重视气候适应和协助树木迁移作为管理目标,但他们的努力受到信息差距的限制,因为干旱对东北树木的影响以前不是一个高度优先的研究事项。 此外,树木如何适应干旱可能会影响它们对极端寒冷和春季霜冻等其他压力因素的脆弱性,这些因素将在未来几十年内继续成为东北冬季的一部分。这项研究将提高对东北树种如何应对干旱以及不同干旱适应如何影响其对其他气候压力的脆弱性的理解。 这将通过在美国东北部和亚拉巴马的一个地点对许多物种和地点条件进行广泛的干旱相关植物性状测量来实现,该地点在其目前范围的南端包含类似物种。 将使用一种新方法收集数据,该方法大大增加了可处理的组织样本数量。 研究结果将用于改进森林模拟模型,以帮助森林管理人员评估不同管理策略的结果。这项工作将得到一个利益相关者咨询委员会的指导,该委员会由森林管理者、保护团体和其他投资于东北部森林未来福祉的人组成。气候预测包括:仲夏干旱频率增加,冬季总体温暖,但北极空气周期性注入,可能导致春末结冰和破坏性寒冷压力。预测森林将如何应对的能力受到以下因素的限制:对调节树木对气候压力的反应的植物性状的种间和种内变异的了解,以及它们反映环境或进化驱动因素的程度。本研究通过(1)对膨压损失点的变化和驱动因素进行深入研究-树木水平干旱响应的关键决定因素-以及相关的寒冷和干旱恢复力性状和(2)确定干旱和干旱恢复力之间的关系研究个体。这项工作将涉及叶渗透势和膨压损失点,相关的生理植物性状和生根深度的广泛的实地测量,以及对遗传相同的个人的操纵实验。采样将在美国东北部和亚拉巴马的一个地点进行,该地点在其分布范围的南端有类似的物种。 这项工作将由一个由森林投资者组成的咨询委员会指导(例如,森林管理人员、保护团体和土著社区成员)。研究结果将用于改进一个生态系统模型,该模型模拟了一系列气候和森林管理情景下的森林生长。该奖项反映了NSF的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。

项目成果

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Scott Ollinger其他文献

Scott Ollinger的其他文献

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{{ truncateString('Scott Ollinger', 18)}}的其他基金

MSB-FRA: The influence of biological diversity on land-atmosphere exchange in forests: confronting theory with data
MSB-FRA:生物多样性对森林陆地-大气交换的影响:理论与数据的对峙
  • 批准号:
    1638688
  • 财政年份:
    2016
  • 资助金额:
    $ 67.05万
  • 项目类别:
    Standard Grant
Collaborative Research: Nitrogen Retention and Ecosystem Succession: Theory Meets Data
合作研究:氮保留和生态系统演替:理论与数据的结合
  • 批准号:
    1257959
  • 财政年份:
    2013
  • 资助金额:
    $ 67.05万
  • 项目类别:
    Standard Grant
Collaborative Research: Landscape and regional scale studies of nitrogen gas flux
合作研究:氮气通量的景观和区域尺度研究
  • 批准号:
    0919151
  • 财政年份:
    2009
  • 资助金额:
    $ 67.05万
  • 项目类别:
    Standard Grant
Exploring Ecosystems and the Atmosphere in the K-12 Classroom: A Plan to Integrate NASA Carbon Cycle Science with GLOBE
探索 K-12 课堂中的生态系统和大气:将 NASA 碳循环科学与 GLOBE 相结合的计划
  • 批准号:
    0627916
  • 财政年份:
    2006
  • 资助金额:
    $ 67.05万
  • 项目类别:
    Continuing Grant

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Cell Research
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    30824808
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    2008
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    24.0 万元
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    专项基金项目
Research on the Rapid Growth Mechanism of KDP Crystal
  • 批准号:
    10774081
  • 批准年份:
    2007
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  • 项目类别:
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    2307792
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