Grazer-Mycorrhizal Interactions in Tallgrass Prairie: Effects on Carbon and Nitrogen Partitioning and Sequestration

高草草原中的食草动物-菌根相互作用：对碳和氮分配和封存的影响

• 批准号: 0236106
• 负责人: Charles Rice
• 金额: --
• 依托单位: Kansas State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-04-15 至 2008-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0236106&HistoricalAwards=false
• 关键词: Grazer; Mycorrhizal; Interactions; Tallgrass; Prairie

Although mycorrhizal symbioses (mutualistic associations of plant roots and fungi) are ubiquitous in nature, neither the influences of mycorrhizae on carbon and nitrogen retention nor theier effects on soil food webs and nutrient cycling are well understood. This project is seeking to determine: 1) the role of mycorrhizal symbiosis on C and N sequestration; 2) the impact of belowground grazers on C and N cycling within the biotic communities; 3) the interactive feedbacks of sequestered C and nutrient availability on soil biota. Planned greenhouse and field studies will include experimental manipulations of mycorrhizal fungi, a belowground grazer community (nematodes), and soil nutrient availability. Measurements will include tracing C and N flow through the plant/soil systems and the responses of the soil biotic communities. Broader Impact: Undergraduate and graduate students will involved will likely serve as coauthors of publications. Results will be presented publicly through via Visitors' Days at the Konza Prairie Biological Station and via broadcast media research updates on a local public radio station. The proposed studies will provide needed information on how interactions within the belowground biotic community impact C dynamics, N availability, and sequestration of C and N into the soil organic matter, and on the feedback effects of changes in C and N dynamics on plant-fungal-grazer interactions

虽然菌根共生(植物根和真菌的共生共生)在自然界中普遍存在，但菌根对碳、氮保持的影响以及它们对土壤食物网和养分循环的影响都不是很清楚。该项目试图确定：1)菌根共生对C和N固存的作用；2)地下食草动物对生物群落内C和N循环的影响；3)固存C和养分有效性对土壤生物群的交互反馈。计划中的温室和实地研究将包括菌根真菌、地下食草动物群落(线虫)和土壤养分有效性的实验操作。测量将包括跟踪C和N在植物/土壤系统中的流动以及土壤生物群落的反应。更广泛的影响：本科生和研究生将参与其中，很可能成为出版物的合著者。结果将通过Konza Prairie生物站的游客日和当地公共广播电台的广播媒体研究更新公开展示。拟议的研究将提供有关地下生物群落内的相互作用如何影响C动态、N有效性以及C和N在土壤有机质中的固存，以及C和N动态变化对植物-真菌-牧草相互作用的反馈效应的必要信息