Understanding the effects of above- and belowground linkages on carbon cycling in a high latitude, coastal wetland

了解高纬度沿海湿地地上和地下联系对碳循环的影响

基本信息

批准号：
1932889
负责人：
Trisha Atwood
金额：
$ 140.28万
依托单位：
Utah State University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-08-01 至 2025-01-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1932889&HistoricalAwards=false
关键词：
Understanding effects above belowground linkages

项目摘要

The Yukon-Kuskokwim Delta of western Alaska is one of the largest river deltas in the world and the summer home to millions of migratory birds. Although grazing birds strongly affect the plant communities in river deltas, little is known about how changing waterfowl populations in the Arctic affect the release from soils of greenhouse gases like carbon dioxide and methane. This project is examining relationships among grazing birds, plant communities, soil microbes, and ecosystem carbon cycling in the Yukon-Kuskokwim Delta to predict how these ecosystems may change in the future. This project will produce on-line learning modules about the relationships among geese, plants, microbes, and greenhouse gases and disseminate them to middle school students in the local Alaskan school district. Local students will also be trained in and produce local radio stories about the research. Finally, the research will be broadcasted through on-line media outlets and local TV channels. This project is using a combination of field experiments, lab experiments, and biogeochemical models to provide a mechanistic understanding of the effects of grazing on greenhouse gas dynamics in a high latitude coastal wetland. This project is quantifying the independent and combined effects of grazing, trampling, and feces deposition by geese on microbial communities, soil microclimate, and carbon dynamics using a two-year field experiment. A laboratory experiment is being used to quantify how herbivore-mediated changes in the quantity and quality of soil carbon inputs affect microbial community structure and carbon dynamics. Finally, results from these experiments are being used to parameterize a biogeochemical simulation model to predict how changes in herbivory will affect carbon dynamics in subarctic wet sedge under future climates. By examining the effects of herbivory with this holistic view, the predictive power of ecosystem models will be increased, especially for high-latitude systems where herbivory is a prevalent driver of primary production and plant community composition.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.

阿拉斯加西部的育空-库斯科奎姆三角洲是世界上最大的河流三角洲之一，也是数百万候鸟的避暑家园。尽管食草鸟类强烈影响河流三角洲的植物群落，但人们对北极水禽种群的变化如何影响土壤中二氧化碳和甲烷等温室气体的释放知之甚少。该项目正在研究育空-库斯科奎姆三角洲的食草鸟类、植物群落、土壤微生物和生态系统碳循环之间的关系，以预测这些生态系统未来将如何变化。该项目将制作有关鹅、植物、微生物和温室气体之间关系的在线学习模块，并将其传播给阿拉斯加当地学区的中学生。当地学生也将接受培训并制作有关该研究的当地广播故事。最后，该研究将通过在线媒体和当地电视频道进行广播。该项目结合了现场实验、实验室实验和生物地球化学模型，从机理上理解放牧对高纬度沿海湿地温室气体动态的影响。该项目通过为期两年的现场实验，量化了鹅的放牧、践踏和粪便沉积对微生物群落、土壤微气候和碳动态的独立和综合影响。一项实验室实验被用来量化食草动物介导的土壤碳输入数量和质量的变化如何影响微生物群落结构和碳动态。最后，这些实验的结果被用来参数化生物地球化学模拟模型，以预测食草动物的变化将如何影响未来气候下亚北极湿莎草的碳动态。通过用这种整体观点来检验食草的影响，生态系统模型的预测能力将得到提高，特别是对于高纬度系统来说，食草是初级生产和植物群落组成的普遍驱动力。该奖项反映了 NSF 的法定使命，并已被通过使用基金会的智力优点和更广泛的影响审查标准进行评估，认为值得支持。

项目成果

期刊论文数量（3）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Herbivory changes soil microbial communities and greenhouse gas fluxes in a high-latitude wetland

食草改变了高纬度湿地的土壤微生物群落和温室气体通量

DOI：
10.1007/s00248-021-01733-8
发表时间：
2021-03
期刊：
Microbial Ecology
影响因子：
3.6
作者：
Foley, Karen M.;Beard, Karen H.;Atwood, Trisha B.;Waring, Bonnie G.
通讯作者：
Waring, Bonnie G.

Short‐term effects of experimental goose grazing and warming differ in three low‐Arctic coastal wetland plant communities

实验性鹅放牧和气候变暖对三个低纬度北极沿海湿地植物群落的短期影响不同

DOI：
10.1111/jvs.13139
发表时间：
2022-06
期刊：
Journal of Vegetation Science
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：
2022-03
期刊：
Ecosystems
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