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地区育空地区是世界上最大的河流三角洲之一，也是数百万迁徙鸟类的暑假。尽管放牧的鸟类强烈影响三角洲河中的植物群落，但对于北极中水禽种群的变化如何影响从二氧化碳和甲烷等温室气体的土壤释放中却一无所知。该项目正在研究育空-Kuskokwim三角洲的放牧鸟类，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将来如何改变。该项目将生成有关鹅，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。当地学生还将接受培训并创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。该项目正在结合现场实验，实验室实验和生物地球化学模型，以提供对放牧对高纬度沿海湿地中温室气体动力学影响的机械理解。该项目正在使用为期两年的现场实验来量化鹅对微生物群落，土壤微气候和碳动力学的放牧，践踏和粪便沉积的独立和综合作用。一个实验室实验被用于量化草食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丝的碳动态。通过通过这种整体观点来检查草食的影响，将提高生态系统模型的预测能力，尤其是对于高纬度系统，食草是主要生产和植物社区构图的普遍驱动力。这奖反映了NSF的法定任务，并且已经是认为值得通过基金会的智力优点和更广泛影响的评论标准来评估值得支持。

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

DOI：
10.1007/s00248-021-01733-8
发表时间：
2021-03-22
期刊：
MICROBIAL ECOLOGY
影响因子：
3.6
作者：
Foley, Karen M.;Beard, Karen H.;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：
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
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