Collaborative Research: Climate-induced sea-level rise, warming and herbivory effects on vegetation and greenhouse gas emission in coastal western Alaska

合作研究:气候引起的海平面上升、变暖和食草对阿拉斯加西部沿海植被和温室气体排放的影响

基本信息

  • 批准号:
    2113692
  • 负责人:
  • 金额:
    $ 38.04万
  • 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:
    2022-02-01 至 2026-01-31
  • 项目状态:
    未结题

项目摘要

Arctic coastal wetlands are experiencing the effects of climate change, including warming temperatures, flooding from sea level rise, and changes to the number of geese that migrate in the summer and graze on local plants. The Yukon-Kuskokwim (Y-K) Delta of Alaska is one of the largest river deltas in the world and an important ecosystem for millions of migratory geese. This research looks at how warming, increased flooding, and changes in the impacts of geese will affect different plant communities and the uptake and release of greenhouse gases, which influence the rate of climate change. The investigators will conduct field experiments in different plant communities that will experience different levels of flooding, warming, and goose impacts, and measure plant and greenhouse gas responses to these changes. The investigators will also conduct laboratory experiments where the investigators can tightly control temperature, flooding, and effects of geese to better understand the mechanisms behind our measured field responses. This project expands our understanding because it will be conducted across both coastal and inland landscapes in the Y-K Delta, unlike previous research. The experiments will look at complex interactions between flooding, warming, and goose grazing to tease apart these three effects. The deep understanding provided from these experiments can also be applied to other ecosystems because many coastal regions in the Arctic are experiencing similar climate changes. The investigators will work with a school teacher to build learning modules based on this research that will be used in middle schools across native villages in the Y-K Delta. The researchers will work with local high school students at the research site to train them in field techniques as well as help them develop a story about the research for the local radio station. Finally, the investigators will train and mentor a post-doctoral researcher, two graduate students, and undergraduates at three universities, who will disseminate their findings through scientific conferences and publications. Arctic coastal wetlands are experiencing significant consequences of climate change, including increasing temperature, rising sea level, and changing waterfowl abundances. The Yukon-Kuskokwim (Y-K) Delta in Alaska, one of the largest river deltas in the world, is an important refuge for millions of migratory birds and one of the most vulnerable regions in North America to these changes. The overall goal of this proposal is to investigate how increasing temperature and flooding, in light of changing waterfowl abundances, interact to affect plant communities and greenhouse gas (GHG) emissions, specifically carbon dioxide and methane, across the Y-K Delta landscape. To address this goal, the investigators will conduct a large-scale field experiment, where they will manipulate temperature, flooding regimes, and goose impacts to quantify how these variables interact to influence plant communities and GHG fluxes. The investigators will use laboratory experiments to expand inference and understanding of the mechanisms behind the measured responses. The combination of these approaches will result in a greater understanding of what drives vegetation community dynamics and GHG emissions from this system. The proposed research addresses three gaps in knowledge: 1) This research expands our knowledge about GHG fluxes in the Y-K Delta by measuring the controls on GHGs in both coastal and inland plant communities; 2) The results will inform prediction of how climate-induced changes will interact to influence communities and GHG fluxes in the future; and 3) By improving understanding of the mechanisms that drive GHG fluxes across a gradient of conditions, the work will improve understanding of how GHG fluxes will be affected by climate change in other high-latitude coastal wetland systems. For broader impacts, the investigators will work with a local school teacher to build learning modules from our research to be used in middle schools across native villages in the Y-K Delta. The investigators will work with local high school students at the research site to train them in field techniques as well as help them develop a story about the research for the local radio station. The investigators will train and mentor a post-doctoral researcher, two graduate students, and undergraduates at three universities, who will disseminate their findings through scientific conferences and publications.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.
北极沿海湿地正在经历气候变化的影响,包括温度变暖,海平面上升的洪水以及夏季迁移的鹅数量的变化以及对当地植物的放牧。阿拉斯加的育空地区(Y-K)三角洲是世界上最大的河流三角洲之一,也是数百万迁徙鹅的重要生态系统。这项研究探讨了鹅的变暖,增加洪水和影响的变化将影响不同的植物群落,并吸收和释放温室气体,从而影响气候变化的速度。研究人员将在不同植物群落中进行现场实验,以经历不同水平的洪水,变暖和鹅的影响,并测量植物和温室气体对这些变化的反应。研究人员还将进行实验室实验,其中研究人员可以密切控制温度,洪水和鹅的影响,以更好地了解我们测得的现场反应背后的机制。该项目扩大了我们的理解,因为与先前的研究不同,它将在Y-K三角洲的沿海和内陆景观中进行。这些实验将研究洪水,变暖和鹅放牧之间的复杂相互作用,以嘲笑这三个效果。这些实验提供的深刻理解也可以应用于其他生态系统,因为北极的许多沿海地区都经历了类似的气候变化。调查人员将与一名学校老师合作,​​根据这项研究来建立学习模块,该研究将用于Y-K Delta的本地村庄的中学。研究人员将与研究站点的当地高中学生合作,以培训他们的现场技术,并帮助他们开发有关当地广播电台研究的故事。最后,调查人员将在三所大学中培训和指导一名博士后研究人员,两名研究生以及本科生,他们将通过科学会议和出版物来分散他们的发现。北极沿海湿地正在遭受气候变化的重大影响,包括温度升高,海平面上升和水禽丰度变化。世界上最大的河流三角洲之一是阿拉斯加的育空地区(Y-K)三角洲,是数百万候鸟,也是北美最脆弱地区之一的重要避难所。该提案的总体目标是研究如何鉴于水禽丰度的变化,温度和洪水增加如何相互作用,以影响植物群落和温室气体(GHG)排放,特别是跨Y-K Delta景观的二氧化碳和甲烷。为了解决这一目标,研究人员将进行大规模的现场实验,在那里他们会操纵温度,洪水泛滥和鹅的影响,以量化这些变量如何相互作用以影响植物群落和温室气体通量。研究人员将使用实验室实验来扩大对测量反应背后机制的推理和理解。这些方法的结合将使人们更加了解驱动植被社区动态和温室气体排放的原因。拟议的研究解决了知识的三个差距:1)这项研究通过测量沿海和内陆植物社区的温室气体控制措施来扩大我们对Y-K三角洲温室气体通量的知识; 2)结果将为气候引起的变化如何相互作用以影响社区和温室气体助剂的预测; 3)通过提高对驱动温室通量跨越各种条件的机制的理解,这项工作将提高人们对其他高纬度沿海湿地系统中气候变化影响温室气通量的理解。对于更广泛的影响,调查人员将与当地的学校老师合作,​​从我们的研究中建立学习模块,以在Y-K Delta的本地村庄的中学中使用。调查人员将与研究网站的当地高中生合作,以培训他们的现场技术,并帮助他们开发有关当地广播电台研究的故事。调查人员将培训和指导一名博士后研究人员,两名研究生以及三所大学的本科生,他们将通过科学的会议和出版物来传播他们的发现。该奖项反映了NSF的法定任务,并被认为是通过使用评估值得的支持,基金会的智力优点和更广泛的影响评论标准。

项目成果

期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Short‐term effects of experimental goose grazing and warming differ in three low‐Arctic coastal wetland plant communities
实验性鹅放牧和变暖的短期影响对三个低纬度北极沿海湿地植物群落的影响不同
  • DOI:
    10.1111/jvs.13139
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    2.8
  • 作者:
    Choi, Ryan T.;Petit Bon, Matteo;Leffler, A. Joshua;Kelsey, Katharine C.;Welker, Jeffrey M.;Beard, Karen H.
  • 通讯作者:
    Beard, Karen H.
Goose Feces Effects on Subarctic Soil Nitrogen Availability and Greenhouse Gas Fluxes
鹅粪便对亚北极土壤氮素有效性和温室气体通量的影响
  • DOI:
    10.1007/s10021-022-00752-x
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    Beard, Karen H.;Kelsey, Katharine C.;Choi, Ryan T.;Welker, Jeffrey M.;Leffler, A. Joshua
  • 通讯作者:
    Leffler, A. Joshua
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A Joshua Leffler其他文献

A Joshua Leffler的其他文献

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{{ truncateString('A Joshua Leffler', 18)}}的其他基金

Collaborative Research: RAPID: Typhoon Merbok in coastal western Alaska: Extent of flooding and impacts on plant communities and ecosystem function
合作研究:RAPID:阿拉斯加西部沿海的台风梅尔博克:洪水的程度及其对植物群落和生态系统功能的影响
  • 批准号:
    2302105
  • 财政年份:
    2022
  • 资助金额:
    $ 38.04万
  • 项目类别:
    Standard Grant
Collaborative Research: Nutritional Landscapes of Arctic Caribou: Observations, Experiments, and Models Provide Process-Level Understanding of Forage Traits and Trajectories
合作研究:北极驯鹿的营养景观:观察、实验和模型提供了对饲料特性和轨迹的过程级理解
  • 批准号:
    1602440
  • 财政年份:
    2017
  • 资助金额:
    $ 38.04万
  • 项目类别:
    Standard Grant

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