Collaborative Research: Using the ITEX-AON network to document and understand terrestrial ecosystem change in the Arctic

合作研究：利用 ITEX-AON 网络记录和了解北极陆地生态系统的变化

• 批准号: 1836839
• 负责人: Robert Hollister
• 金额: $ 99.3万
• 依托单位: Grand Valley State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-05-01 至 2025-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1836839&HistoricalAwards=false
• 关键词: Collaborative; Research; Using; ITEX; AON

The overarching goal of the project is to understand tundra ecosystem change across landscape types and enable realistic forecasts of change across the Arctic. The power of the International Tundra Experiment (ITEX)- Arctic Observatory Network (AON) is founded on a capacity to synthesize and compare results across sites that use standardized sampling protocols. Specifically, this project will (1) maintain the data-streams at ITEX-AON sites in Alaska near Toolik Lake, Imnavait Creek, Utqiagvik (Barrow), and Atqasuk; (2) lead two new ITEX network syntheses focused on soil carbon and phenocam imagery; (3) increase scientific literacy; and, (4) expand citizen science opportunities across communities in northern Alaska. The project will sustain an array of large and publicly available data-streams documenting ecosystem change occurring across the Arctic and will team up with citizen scientists to expand the monitoring footprint of the network and the societal relevance of this work to communities across the North Slope of Alaska. The ITEX network was chartered in 1990 to document and understand the ecological impacts of a warming Arctic. The US-led ITEX projects expanded their monitoring efforts across a larger spatial area with the use of automated sampling to form an Arctic Observatory Network (AON) in 2009. The ITEX-AON currently includes traditional ITEX measurements (phenology, cover, carbon flux and nutrient cycling), as well as phenocams, automated mobile sensor platforms (MISP) and mid-scale aerial imagery of 1 km2 ARCSS (Arctic System Science) grids established in the 1990s. In this phase of the project, collection of core data sets will be sustained and new data sets will be added with the aim of identifying and understanding patterns of change and feedbacks. Specifically, ITEX-AON will expand its collection of vegetation functional traits to better understand ecosystem response and predict future change. ITEX-AON will also further expand automated measurements to link plot level change (sampled by hand or with hand-held equipment) with landscape level observations (sampled by phenocams or drones) and high resolution regional imagery (sampled by aircraft or satellite). The new phase of ITEX-AON will include two synthesis efforts: (1) an examination of soil carbon dynamics across the ITEX network, and (2) a multi-scale phenological analysis using phenocam and high resolution satellite imagery to determine fine-scale spatiotemporal patterns of seasonal greening trends across the Arctic. Mentoring of postdocs, and training of graduate and undergraduate students are some of the primary broader impacts of this project. The project will continue to provide a test bed for engineering and software development that will be shared freely among the ITEX network and broader science community and will expand outreach activities aimed at improving science literacy.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.

该项目的总体目标是了解不同景观类型的苔原生态系统变化，并对整个北极的变化进行现实的预测。国际苔原实验 (ITEX) - 北极观测站网络 (AON) 的力量建立在使用标准化采样协议跨站点综合和比较结果的能力之上。具体来说，该项目将 (1) 维护阿拉斯加 Toolik Lake、Imnavait Creek、Utqiagvik（巴罗）和 Atqasuk 附近 ITEX-AON 站点的数据流； (2) 领导两项新的 ITEX 网络综合，重点关注土壤碳和 Phenocam 图像； (3)提高科学素养； (4) 扩大阿拉斯加北部社区的公民科学机会。该项目将维持一系列大型且公开的数据流，记录整个北极发生的生态系统变化，并将与公民科学家合作，扩大网络的监测范围以及这项工作与北极北坡社区的社会相关性。阿拉斯加州。 ITEX 网络于 1990 年成立，旨在记录和了解北极变暖对生态的影响。美国主导的 ITEX 项目通过使用自动采样在更大的空间区域扩大了监测工作，于 2009 年形成了北极观测网络 (AON)。ITEX-AON 目前包括传统的 ITEX 测量（物候、覆盖、碳通量和营养循环），以及 phenocam、自动移动传感器平台 (MISP) 和 20 世纪 90 年代建立的 1 平方公里 ARCSS（北极系统科学）网格的中尺度航空图像。在项目的这一阶段，将持续收集核心数据集，并添加新的数据集，目的是识别和理解变化和反馈的模式。具体来说，ITEX-AON 将扩大其植被功能特征的收集，以更好地了解生态系统响应并预测未来的变化。 ITEX-AON 还将进一步扩展自动化测量，将地块水平变化（手动或手持设备采样）与景观水平观测（通过非诺摄像机或无人机采样）和高分辨率区域图像（通过飞机或卫星采样）联系起来。 ITEX-AON 的新阶段将包括两项综合工作：(1) 通过 ITEX 网络检查土壤碳动态，以及 (2) 使用 Phenocam 和高分辨率卫星图像进行多尺度物候分析，以确定精细尺度时空整个北极的季节性绿化趋势模式。博士后的指导以及研究生和本科生的培训是该项目的一些主要更广泛的影响。该项目将继续为工程和软件开发提供一个测试平台，并在 ITEX 网络和更广泛的科学界之间自由共享，并将扩大旨在提高科学素养的外展活动。该奖项反映了 NSF 的法定使命，并被认为是值得的通过使用基金会的智力优势和更广泛的影响审查标准进行评估来提供支持。

项目成果

Understanding the climate impacts on decadal vegetation change in northern Alaska

了解气候对阿拉斯加北部十年植被变化的影响

• DOI: 10.1139/as-2020-0050
• 发表时间: 2022-09
• 期刊: Arctic Science
• 影响因子: 3.3
• 作者: Harris, Jacob A.;Hollister, Robert D.;Botting, Timothy F.;Tweedie, Craig E.;Betway, Katlyn R.;May, Jeremy L.;Barrett, Robert T.S.;Leibig, Jenny A.;Christoffersen, Hana L.;Vargas, Sergio A.;et al
• 通讯作者: et al

Site-specific responses of fungal and bacterial abundances to experimental warming in litter and soil across Arctic and alpine tundra

北极和高山苔原的垃圾和土壤中真菌和细菌丰度对实验性变暖的特定地点响应

• DOI: 10.1139/as-2020-0053
• 发表时间: 2022-09
• 期刊: Arctic Science
• 影响因子: 3.3
• 作者: Jeanbille, Mathilde;Clemmensen, Karina;Juhanson, Jaanis;Michelsen, Anders;Cooper, Elisabeth J.;Henry, Greg H.R.;Hofgaard, Annika;Hollister, Robert D.;Jónsdóttir, Ingibjörg S.;Klanderud, Kari;et al
• 通讯作者: et al

Can plant functional traits explain shifts in community composition in a changing Arctic?

植物功能性状可以解释不断变化的北极群落组成的变化吗？

• DOI: 10.1139/as-2020-0036
• 发表时间: 2022-09
• 期刊: Arctic Science
• 影响因子: 3.3
• 作者: Betway;Hollister, Robert D.;May, Jeremy L.;Harris, Jacob A.;Gould, William A.;Oberbauer, Steven F.
• 通讯作者: Oberbauer, Steven F.

The tundra phenology database: More than two decades of tundra phenology responses to climate change

苔原物候数据库：二十多年来苔原物候对气候变化的响应

• DOI: 10.1139/as-2020-0041
• 发表时间: 2021-05
• 期刊: Arctic Science
• 影响因子: 3.3
• 作者: Prevéy, Janet;Elmendorf, Sarah;Bjorkman, Anne;Alatalo, Juha;Ashton, Isabel;Assmann, Jakob;Björk, Robert G.;Björkman, Mats P.;Cannone, Nicoletta;Carbognani, Michele;et al
• 通讯作者: et al

Global plant trait relationships extend to the climatic extremes of the tundra biome

全球植物性状关系延伸至苔原生物群落的极端气候

• DOI: 10.1038/s41467-020-15014-4
• 发表时间: 2020-12
• 期刊: Nature Communications
• 影响因子: 16.6
• 作者: Thomas, H. J.;Bjorkman, A. D.;Myers;Elmendorf, S. C.;Kattge, J.;Diaz, S.;Vellend, M.;Blok, D.;Cornelissen, J. H.;Forbes, B. C.;et al
• 通讯作者: et al