Minirhizotron Imaging Equipment for the Study of Root Dynamics in Alaskan Taiga Ecosystems

用于研究阿拉斯加针叶林生态系统根系动态的 Minirhizotron 成像设备

• 批准号: 9207608
• 负责人: Roger Ruess
• 金额: $ 3.99万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-05-15 至 1994-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9207608&HistoricalAwards=false
• 关键词: Minirhizotron; Imaging; Equipment; Study; Root

This proposal requests funds for the implementation of minirhizotron imaging to study the dynamics of fine root growth and turnover in relation to resource availability and herbivory along a successional forest gradient in Alaska. Virtually nothing is known concerning the rates of, or control over allocation to roots in taiga ecosystems, or the contribution of root turnover to soil carbon and nutrient pools. Such information is significant, however, given the fact that taiga contains approximately 20% of the Earth's stored carbon. Preliminary results show that fluxes through roots may constitute a significant percentage of the total carbon budget of these ecosystems, thus this research project has implications beyond the immediate questions of forest successional dynamics, pertinent to the broader topic of dynamic ecosystem modelling and global land-atmosphere carbon exchanges. %%% This belowground research instrumentation to be used at the Bonanza Creek Long-term Ecological Research site will provide new insights into the structure and function of taiga ecosystems and serve to couple many of the research disciplines on the LTER project. In addition, this new instrumentation will significantly enhance instructional and research opportunities for undergraduate, raduate and postdoctoral training.

该提案要求提供资金， 微电子成像研究细根生长动态 与资源的可利用性和草食性有关 沿着阿拉斯加的森林演替梯度。几乎没有 是已知的关于率，或控制分配给 针叶林生态系统中的根，或根周转对 土壤碳库和养分库。这种信息是重要的， 然而，由于针叶林含有大约20%的 地球储存的碳初步结果表明， 通过根可能构成一个显着的百分比， 这些生态系统的总碳预算，因此这个研究项目 其影响超出了森林的直接问题， 继承动态，与更广泛的动态专题有关 生态系统建模和全球陆地-大气碳交换。 %%% 这种地下研究仪器将用于 博南扎溪长期生态研究网站将提供新的 深入了解针叶林生态系统的结构和功能， 有助于将LTER上的许多研究学科结合起来 项目此外，这种新的仪器将大大 增加本科生的教学和研究机会， 研究生和博士后培训。