LTER: Long-term research on the dynamics of high-elevation ecosystems: A framework for understanding rates of ecological response to climate change
LTER:高海拔生态系统动态的长期研究:了解气候变化生态响应率的框架
基本信息
- 批准号:2224439
- 负责人:
- 金额:$ 765万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2022
- 资助国家:美国
- 起止时间:2022-12-15 至 2028-11-30
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
Mountains provide critical services for human society and important habitats for diverse forms of life. They are also changing rapidly: temperatures are rising, leading to shifts in the timing of snowmelt, the amount of water flowing downstream, and the length of the snow-free growing season. While more than one-sixth of the world’s population lives in river basins fed by snow or glacier melt, we know very little about how changing climate in high mountain areas will affect biodiversity and water resources. One reason for this knowledge gap is that rugged mountain terrain causes the patterns of changing temperature to vary dramatically across the landscape. The Niwot Ridge (NWT) LTER is an interdisciplinary research program that is investigating how complex topography interacts with biological processes to determine how high-elevation mountain ecosystems are changing in response to rising temperature. The project documents long-term patterns of climate change in alpine tundra, subalpine forest, mountain lakes, and alpine streams, as well as the associated responses of organisms, populations, communities, and ecosystem processes. Located in the populous Front Range of the Colorado Rocky Mountains, NWT LTER is uniquely positioned to generate results that will directly impact a large human population while engaging diverse audiences in ecology, conservation, and mountain science.For over four decades, the NWT LTER has documented rapidly rising temperatures amidst highly variable precipitation patterns at the study site. The biological responses to these changes in climate have been highly variable in both speed and magnitude. In NWT LTER VIII, scientists will evaluate the ecological mechanisms that determine the rates at which biota and ecosystem processes respond to rising temperature. Leveraging the topographic complexity of NWT terrain, the proposed research will examine how rates of ecological responses to rising air temperature are mediated by spatial heterogeneity in temperature exposure and other abiotic factors (e.g., precipitation, growing season length, nutrients), and if these responses are accelerated or attenuated by biotic processes that play out across the physical template (e.g., life history strategies, community dynamics, ecosystem legacies). The specific objectives of this research include (1) continuing to characterize how high-elevation mountain systems are responding to climate change, (2) testing hypothesized mechanisms that explain variation in the rate at which ecological responses track rising air temperature, and (3) exploring how the aggregated effects of variable rates of response to warming alter forecasts of ecosystem function across mountain landscapes. This research program provides critical information about the effects of climate change on mountain ecosystems that informs the conservation and management of mountain catchments and the resources they provide to society.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.
山区为人类社会提供重要服务,也是各种生命的重要栖息地。它们也在迅速变化:气温上升,导致融雪时间、下游水量和无雪生长季节长度发生变化。虽然世界上超过六分之一的人口生活在冰雪或冰川融化的河流流域,但我们对高山地区气候变化将如何影响生物多样性和水资源知之甚少。造成这种知识差距的一个原因是,崎岖的山区地形导致气温变化的模式在整个景观中变化巨大。尼沃特岭(NWT)LTER是一个跨学科的研究计划,正在调查复杂的地形如何与生物过程相互作用,以确定高海拔山区生态系统如何应对温度上升。该项目记录了高山冻原、亚高山森林、高山湖泊和高山溪流的长期气候变化模式,以及生物、种群、社区和生态系统过程的相关反应。位于人口稠密的科罗拉多落基山脉的前山脉,西北地区LTER具有独特的优势,可以产生直接影响大量人口的结果,同时吸引不同的受众参与生态学,保护和山区科学。四十多年来,西北地区LTER记录了研究地点高度可变的降水模式中快速上升的温度。生物对这些气候变化的反应在速度和幅度上都有很大的差异。在西北地区LTER VIII中,科学家将评估决定生物群和生态系统进程对温度上升作出反应的速率的生态机制。利用西北地区地形的复杂性,拟议的研究将研究生态对气温上升的反应率如何受到温度暴露和其他非生物因素(例如,降水量、生长季节长度、营养物),并且如果这些响应被在物理模板上发生的生物过程加速或减弱(例如,生活史策略、群落动态、生态系统遗产)。本研究的具体目标包括:(1)继续描述高海拔山区系统如何响应气候变化,(2)测试解释生态响应跟踪气温上升的速率变化的假设机制,以及(3)探索对变暖的可变响应速率的综合影响如何改变对山区景观生态系统功能的预测。该研究项目提供了有关气候变化对山区生态系统影响的重要信息,为山区集水区的保护和管理以及它们为社会提供的资源提供了信息。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
期刊论文数量(12)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Divergent community trajectories with climate change across a fine‐scale gradient in snow depth
雪深细尺度梯度上气候变化的不同群落轨迹
- DOI:10.1111/1365-2745.14223
- 发表时间:2023
- 期刊:
- 影响因子:5.5
- 作者:Oldfather, Meagan F.;Elmendorf, Sarah C.;Van Cleemput, Elisa;Henn, Jonathan J.;Huxley, Jared D.;White, Caitlin T.;Humphries, Hope C.;Spasojevic, Marko J.;Suding, Katharine N.;Emery, Nancy C.
- 通讯作者:Emery, Nancy C.
Trophic group specific responses of alpine nematode communities to 18 years of N addition and codominant plant removal
- DOI:10.1007/s11104-023-06281-3
- 发表时间:2023-10
- 期刊:
- 影响因子:4.9
- 作者:Rachel M. Shepherd;L. Brigham;C. P. B. de Mesquita;K. Gattoni;E. Gendron;Philip G. Hahn;Steven K. Schmidt;Jane G. Smith;K. Suding;D. Porazinska
- 通讯作者:Rachel M. Shepherd;L. Brigham;C. P. B. de Mesquita;K. Gattoni;E. Gendron;Philip G. Hahn;Steven K. Schmidt;Jane G. Smith;K. Suding;D. Porazinska
Stress-associated metabolites vary with both season and habitat across populations of a climate sentinel species
- DOI:10.1080/15230430.2022.2146633
- 发表时间:2022-12-31
- 期刊:
- 影响因子:2
- 作者:Whipple,A. L.;Ray,C.;Wilkening,J. L.
- 通讯作者:Wilkening,J. L.
Flexible Foliar Stoichiometry Reduces the Magnitude of the Global Land Carbon Sink
- DOI:10.1029/2023gl105493
- 发表时间:2023-11
- 期刊:
- 影响因子:5.2
- 作者:Emma Hauser;W. Wieder;G. Bonan;C. Cleveland
- 通讯作者:Emma Hauser;W. Wieder;G. Bonan;C. Cleveland
Topographic Heterogeneity and Aspect Moderate Exposure to Climate Change Across an Alpine Tundra Hillslope
- DOI:10.1029/2023jg007664
- 发表时间:2023-11-01
- 期刊:
- 影响因子:3.7
- 作者:Jay,K. R.;Wieder,W. R.;Suding,K. N.
- 通讯作者:Suding,K. N.
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Nancy Emery其他文献
Nancy Emery的其他文献
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{{ truncateString('Nancy Emery', 18)}}的其他基金
CAREER: Habitat Specialization and the Evolution of Dispersal
职业:栖息地专业化和扩散的演变
- 批准号:
1553053 - 财政年份:2016
- 资助金额:
$ 765万 - 项目类别:
Continuing Grant
Plant Adaptation in Variable Environments
植物在多变环境中的适应
- 批准号:
1630162 - 财政年份:2015
- 资助金额:
$ 765万 - 项目类别:
Standard Grant
DISSERTATION RESEARCH: Gene flow by seed and pollen: implications for plant adaptation to changing climates
论文研究:种子和花粉的基因流:对植物适应气候变化的影响
- 批准号:
1407011 - 财政年份:2014
- 资助金额:
$ 765万 - 项目类别:
Standard Grant
Plant Adaptation in Variable Environments
植物在多变环境中的适应
- 批准号:
1354900 - 财政年份:2014
- 资助金额:
$ 765万 - 项目类别:
Standard Grant
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