MRI: Acquisition of a Spectral Analysis System to Measure Leaf Optical Properties

MRI：获取光谱分析系统来测量叶子的光学特性

• 批准号: 0820306
• 负责人: Curtis Holder
• 金额: $ 1.75万
• 依托单位: University of Colorado at Colorado Springs
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0820306&HistoricalAwards=false
• 关键词: MRI; Acquisition; Spectral; Analysis; System

This award provides funds for Dr. Curtis Holder of the University of Colorado at Colorado Springs to purchase a UniSpec-SC Spectral Analysis System with integrating sphere to permit examination of the relationship between leaf optical properties and leaf water repellency. The goal is to determine if leaves of species with high water repellency differ in reflectance, transmittance and absorption of incident light from those species with low water repellency. Because leaf water repellency is largely determined by leaf structure and leaf surface properties, leaf optical properties may be a useful method to detect adaptations to leaf water repellency in ecosystems. Dr. Curits will examine the relationships between leaf water repellency, leaf optical properties and leaf characteristics of 37 species within three distinct ecosystems: tropical montaine cloud forest in Guatemala, tropical dry forest in Guatemala and prairie-foothills ecotone in the USA. This study which will be enabled by this instrumentation is significant because it will permit the development of more meaningful models of ecological and forest hydrology processes which incorporate and are revealed through leaf surface variables. Knowledge of ecological and hydrological processes within cloud forests, tropical dry forests and grassland-confier ecotones can be used to guide environmental policy on the management of ecosystems. Students will be actively engaged in the research activities and thus learn field methods and receive experience that will build confidence and encourage the pursuit of scientific careers. Modules using the requested instrument will be developed for classroom experiments that develop inquire-based learning through hypothesis testing.

该奖项为科罗拉多大学科罗拉多斯普林斯分校的Curtis Holder博士提供资金，用于购买带有积分球的UniSpec-SC光谱分析系统，以便研究叶片光学特性和叶片拒水性之间的关系。目的是确定高拒水性树种的叶片在反射率、透射率和入射光吸收方面是否与低拒水性树种的树叶不同。由于叶片的拒水性在很大程度上取决于叶片的结构和表面性质，因此叶片的光学性质可能是检测生态系统中叶片对水分的适应性的一种有用的方法。Curits博士将研究三个不同生态系统中的37种植物的叶片拒水性、叶片光学特性和叶片特征之间的关系，这三个生态系统是：危地马拉的热带蒙丹云雾森林、危地马拉的热带干燥森林和美国的草原山麓交错带。这项研究具有重要意义，因为它将使开发更有意义的生态和森林水文过程模型成为可能，这些模型纳入叶表面变量并通过叶表面变量揭示。云雾森林、热带干燥森林和草原生态交错带内的生态和水文过程的知识可用于指导关于生态系统管理的环境政策。学生将积极参与研究活动，从而学习实地方法并获得经验，这将建立信心并鼓励追求科学事业。使用所需工具的模块将被开发用于课堂实验，通过假设检验发展基于探究的学习。