Collaborative Research: NSFDEB-NERC: Warming's silver lining? Thermal compensation at multiple levels of organization may promote stream ecosystem stability in response to drought

合作研究:NSFDEB-NERC:变暖的一线希望?

基本信息

  • 批准号:
    2312707
  • 负责人:
  • 金额:
    $ 99.02万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2024
  • 资助国家:
    美国
  • 起止时间:
    2024-01-01 至 2026-12-31
  • 项目状态:
    未结题

项目摘要

Human activities and associated greenhouse gas emissions are causing a rise in global temperatures and an increase in extreme climatic events such as droughts. This collaborative USA-UK project is focused on understanding how continued warming and increasing drought will combine to influence the composition and activity of stream and river organisms (i.e., bacteria, algae, and animals). At present, the prevailing view is that warming temperatures and drought will together produce more extreme ecological consequences than would result from either of these stressors alone. However, this project examines a contrary hypothesis that organisms and communities may ‘adjust’ to warming over long periods of time, making them much less susceptible to extreme drought events in the future. In essence, this project tests the hypothesis that stream communities compensate for continued warming and thus will be better able to persist and function in the face of increasing future drought. This research is critical for predicting and mitigating how warming and drought will influence freshwater biodiversity, as well the many important ecological processes in streams, such as nutrient removal and food production, that benefit humanity. This project will provide training, education and professional development opportunities to graduate and undergraduate students.This project takes advantage of two unique research settings: (1) a natural stream thermal gradient in Iceland; and (2) a state-of-the-art experimental stream facility at the University of Birmingham, UK to test the degree to which long-term warming enhances stream ecosystem stability (both resistance and resilience) in response to drought events. The first objective, focused at the individual level, investigates whether physiological adaptations to warming can compensate for reduced invertebrate carbon use efficiencies at high temperatures, thus accelerating growth and energy transfer (i.e., resilience) following drought. The second objective quantifies resistance and resilience of entire invertebrate communities and their biomass production to drought across natural and experimental thermal gradients. The final objective explores the potential for ecosystem-level compensatory responses by examining how warming-induced shifts in primary producer communities and nutrient supply influence stability of ecosystem metabolism and nitrogen uptake in response to drought. Together, these objectives will provide a broader understanding of compensatory responses to warming across multiple levels of biological organization (i.e., individuals to ecosystems), and will help to inform management of freshwater ecosystems. This project is jointly funded by the Population and Community Ecology Cluster in the Division of Environmental Biology and the Established Program to Stimulate Competitive Research (EPSCoR). The UK collaborators on this project will be funded through the UK-NERC program.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.
人类活动和相关的温室气体排放正在导致全球气温上升和干旱等极端气候事件的增加。这个美英合作项目的重点是了解持续变暖和日益干旱将如何联合收割机影响溪流和河流生物的组成和活动(即,细菌、藻类和动物)。目前,普遍的观点是,气温升高和干旱共同产生的生态后果将比单独这两种压力中的任何一种造成的后果更为极端。然而,该项目研究了一个相反的假设,即生物和群落可能会在很长一段时间内“适应”变暖,使它们在未来不太容易受到极端干旱事件的影响。从本质上讲,这个项目测试的假设,流社区补偿持续变暖,从而将能够更好地坚持和功能,面对未来日益干旱。这项研究对于预测和缓解气候变暖和干旱将如何影响淡水生物多样性以及河流中许多重要的生态过程(如营养物去除和粮食生产)至关重要,这些过程造福于人类。该项目将为研究生和本科生提供培训、教育和专业发展的机会。该项目利用两个独特的研究环境:(1)冰岛的天然河流温度梯度;以及(2)伯明翰大学最先进的实验流设施,英国测试长期变暖在多大程度上增强了河流生态系统的稳定性(抵抗力和恢复力),以应对干旱事件。第一个目标,集中在个体水平上,研究对变暖的生理适应是否可以补偿高温下无脊椎动物碳利用效率的降低,从而加速生长和能量转移(即,(一)干旱后。第二个目标是量化整个无脊椎动物群落的抵抗力和恢复力,以及它们在自然和实验温度梯度下对干旱的生物量生产。最后一个目标探讨生态系统一级的补偿反应的潜力,通过研究如何变暖引起的变化,在初级生产者社区和营养供应的影响稳定的生态系统代谢和氮吸收,以应对干旱。总之,这些目标将提供一个更广泛的理解补偿反应变暖的多层次的生物组织(即,这将有助于为淡水生态系统的管理提供信息。该项目由环境生物学部门的人口和社区生态集群以及刺激竞争研究的既定计划(EPSCoR)共同资助。该项目的英国合作者将通过UK-NERC计划获得资助。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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Jonathan Benstead其他文献

Jonathan Benstead的其他文献

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{{ truncateString('Jonathan Benstead', 18)}}的其他基金

Collaborative Research: Headwater stream networks in a warming world: predicting heterotrophic ecosystem function using theory, multi-scale temperature manipulations and modeling
合作研究:变暖世界中的源头河流网络:利用理论、多尺度温度操纵和建模预测异养生态系统功能
  • 批准号:
    1655956
  • 财政年份:
    2017
  • 资助金额:
    $ 99.02万
  • 项目类别:
    Standard Grant
Collaborative Research: Interactive effects of temperature and nutrient supply on the structure and function of stream ecosystems
合作研究:温度和养分供应对河流生态系统结构和功能的交互影响
  • 批准号:
    1354624
  • 财政年份:
    2014
  • 资助金额:
    $ 99.02万
  • 项目类别:
    Standard Grant
DISSERTATION RESEARCH: Testing carbon limitation of cave stream ecosystems via a whole-reach detritus addition
论文研究:通过全范围碎屑添加测试洞穴溪流生态系统的碳限制
  • 批准号:
    1011403
  • 财政年份:
    2010
  • 资助金额:
    $ 99.02万
  • 项目类别:
    Standard Grant
Collaborative Research: Predicting Effects of Climate Warming on Stream Ecosystems Using Metabolic Theory and Iceland's Unique Geothermal Environment
合作研究:利用代谢理论和冰岛独特的地热环境预测气候变暖对河流生态系统的影响
  • 批准号:
    0949774
  • 财政年份:
    2010
  • 资助金额:
    $ 99.02万
  • 项目类别:
    Continuing Grant
Collaborative research: Defining ecosystem heterotrophic response to nutrient concentrations and ratios
合作研究:定义生态系统对养分浓度和比率的异养响应
  • 批准号:
    0918904
  • 财政年份:
    2010
  • 资助金额:
    $ 99.02万
  • 项目类别:
    Continuing Grant
U.S.A. - Iceland International Research Planning Visit: Interactive Effects of Climate Warming and Nutrient Enrichment on Stream Ecosystems
美国-冰岛国际研究计划访问:气候变暖和养分富集对溪流生态系统的相互作用
  • 批准号:
    0848479
  • 财政年份:
    2009
  • 资助金额:
    $ 99.02万
  • 项目类别:
    Standard Grant

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合作研究:NSFDEB-NERC:变暖的一线希望?
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    2312706
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    2024
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