LTREB: Testing Paradigms About Plant Functional Responses to Environmental Change

LTREB：测试植物对环境变化的功能反应的范例

• 批准号: 1753859
• 负责人: Sarah Hobbie
• 金额: $ 39.88万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-06-01 至 2023-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1753859&HistoricalAwards=false
• 关键词: LTREB; Testing; Paradigms; About; Plant

Long-term ecological experiments are needed that simulate the conditions of the future so that scientists can study their potential impacts on ecological communities. This study uses a 20-year old, field experiment, called BioCON, that raises the carbon dioxide concentrations in the atmosphere above prairie plant communities to levels that are expected to occur later in this century. The experiment is designed to study how higher carbon dioxide levels in the atmosphere affects the growth of different kinds of plants. The experiment is also designed to understand how the availability of soil nitrogen, an important nutrient that plants need to grow, influences the ability of plants to take up higher levels of carbon dioxide during photosynthesis. Data from the study will be made publicly available through the Cedar Creek, Long Term Ecological Research website. BioCON is visited by over 2500 K-12 students and teachers annually, including teachers of Native American students. College students work and learn how to carry out their own research projects in BioCON each summer. New K-12 lesson plans as well as videos for the sustainability science themed YouTube Channel MinuteEarth will be developed that specifically feature new knowledge gained from BioCON. Through continued measurements of functional group and functional group mixture responses to carbon dioxide (CO2) and nitrogen treatments, this study will test two kinds of hypotheses. The first set uses a functional trait classification framework to develop predictions regarding direct functional group responses to eCO2 and N (i.e., responses expected in the absence of soil-mediated feedbacks, species interactions, or interactions with stochastic or directional changes in climate). The second set posits that long-term outcomes will diverge from predictions based on expected direct responses because of modifying processes, involving physiological acclimation, functional group effects on aboveground and belowground resource supply and soil pH, and interactions between treatments and variation in climate. The long-lived perennials in BioCON have not yet equilibrated in their response to CO2 and N, exhibiting interactions with year-to-year variation in climate and generating soil-mediated feedbacks. In BioCON, across 20 years, C4 species have become increasingly productive under high CO2 whereas the benefit of CO2 has gradually disappeared for C3 species, contradicting current theory. Understanding these divergent responses and whether they will continue is a major focus of the study, along with understanding the role of functional groups with respect to other long-term processes relevant to ecosystems under global environmental change, including productivity, decomposition, nutrient cycling, and water fluxes.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.

需要进行长期的生态实验，以模拟未来的状况，以便科学家可以研究其对生态社区的潜在影响。这项研究使用了一个20岁的现场实验，称为Biocon，该实验将大麻植物群落上方大气中的二氧化碳浓度提高到预计本世纪晚些时候发生的水平。该实验旨在研究大气中较高的二氧化碳水平如何影响不同种类的植物的生长。该实验还旨在了解土壤氮的可用性是如何生长需要生长的一种重要养分的，从而影响植物在光合作用过程中占据更高水平的二氧化碳的能力。该研究的数据将通过Cedar Creek，长期生态研究网站公开获得。 Biocon每年有2500多名K-12学生和老师参观，包括美国原住民学生的老师。大学生每年夏天都在Biocon上工作并学习如何在Biocon进行自己的研究项目。将开发新的K-12课程计划以及以可持续性科学为主题的YouTube Channel Minnearth的视频，这些视频特定为Biocon获得的新知识。通过持续测量功能组和功能组混合物对二氧化碳（CO2）和氮处理的反应，本研究将检验两种假设。第一组使用功能性状分类框架来开发有关直接功能组对ECO2和N的直接响应的预测（即，在没有土壤介导的反馈，物种相互作用或与气候中随机或定向变化的相互作用的情况下，预期的响应是预期的）。第二组认为，由于修改过程，涉及生理适应，功能群对地上和地下资源供应和土壤pH下的功能群体以及治疗方法和气候变化之间的相互作用，长期结果将与基于预期直接反应的预测相差。 Biocon中长期的多年生植物在对CO2和N的反应中尚未平衡，与气候和产生土壤介导的反馈的年度变化表现出相互作用。在Biocon中，在20年中，C4物种在高二氧化碳下变得越来越有效，而二氧化碳的好处逐渐消失了C3物种，与当前的理论相矛盾。了解这些不同的反应以及它们是否将继续是研究的重点，同时了解官能团在全球环境变化下与生态系统相关的其他长期过程中的作用，包括生产力，分解，营养循环以及水磁通量。这种奖励反映了NSF的法定任务和综述的范围，这是通过评估的范围来进行的，这是通过评估的范围来进行的。

项目成果

Limited evidence for spatial resource partitioning across temperate grassland biodiversity experiments

• DOI: 10.1002/ecy.2905
• 发表时间: 2019-11-06
• 期刊: ECOLOGY
• 影响因子: 4.8
• 作者: Barry, Kathryn E.;van Ruijven, Jasper;Weigelt, Alexandra
• 通讯作者: Weigelt, Alexandra

Leguminous plants significantly increase soil nitrogen cycling across global climates and ecosystem types

• DOI: 10.1111/gcb.16742
• 发表时间: 2023-04
• 期刊: Global Change Biology
• 影响因子: 11.6
• 作者: Xiaomei Gou;P. Reich;L. Qiu;M. Shao;G. Wei;Jingjing Wang;Xiaorong Wei

Global patterns and controls of soil nematode responses to nitrogen enrichment: A meta-analysis

• DOI: 10.1016/j.soilbio.2021.108433
• 发表时间: 2021-12
• 期刊: Soil Biology and Biochemistry
• 影响因子: 9.7
• 作者: Qingqiu Zhou;Yangzhou Xiang;Debao Li;Xianzhen Luo;Jianping Wu

Water availability modifies productivity response to biodiversity and nitrogen in long‐term grassland experiments

在长期草原实验中，水的可用性改变了生产力对生物多样性和氮的响应

• DOI: 10.1002/eap.2363
• 发表时间: 2021
• 期刊: Ecological Applications
• 影响因子: 5
• 作者: Kazanski, Clare E.;Cowles, Jane;Dymond, Salli;Clark, Adam T.;David, Aaron S.;Jungers, Jacob M.;Kendig, Amy E.;Riggs, Charlotte E.;Trost, Jared;Wei, Xiaojing
• 通讯作者: Wei, Xiaojing

SoDaH: the SOils DAta Harmonization database, an open-source synthesis of soil data from research networks, version 1.0

SoDaH：SOils Data Harmonization 数据库，来自研究网络的土壤数据的开源综合，版本 1.0

• DOI: 10.5194/essd-13-1843-2021
• 发表时间: 2021
• 期刊: Earth System Science Data
• 影响因子: 11.4
• 作者: Wieder, William R.;Pierson, Derek;Earl, Stevan;Lajtha, Kate;Baer, Sara G.;Ballantyne, Ford;Berhe, Asmeret Asefaw;Billings, Sharon A.;Brigham, Laurel M.;Chacon, Stephany S.
• 通讯作者: Chacon, Stephany S.