The Timing of Drought: Effects on Water Relations of Himalayan Tree Species, Award in U.S. and Indian Currencies

项目描述：本项目资助俄勒冈州科瓦利斯俄勒冈州立大学的Donald Zobel博士和印度纳尼塔尔Kumaun大学的S. P. Singh博士在一个项目中合作研究喜马拉雅树种在不同条件下的水分胁迫。该研究有三个目标：确定印度喜马拉雅中部Kumaun的森林类型根据其湿度胁迫的程度和季节模式的区分程度；确定Kumaun森林树木对干旱的适应机制；通过提供很少被研究的气候下的森林数据，并通过在不同气候下工作的科学家之间的信息交流，提高对森林树木生理生态中水关系地位的普遍理解。将测量海拔1000-2200米的一系列森林类型的早晨水分胁迫程度，以及在雨季开始前叶片发育期间、雨季期间成熟叶片和秋冬旱季期间成熟叶片的水势和气孔开放程度的组成部分。范围：本项目补充了世界上其他地区正在进行的关于不同气候的研究，并提供了夏季潮湿、冬季干燥气候的温带地区无法获得的信息，并且有必要消除适应水可用性模型中的区域偏见。这项工作涉及美国和印度科学家的密切合作和分工。它满足了这次合作的目标。＊＊＊

9312052 Zobel Description: This project supports travel and field expenses for Dr. Donald Zobel of Oregon State University, Corvallis, OR and Dr. S. P. Singh of Kumaun University, Nainital, India, to collaborate in a project to study the moisture stress in Himalayan tree species under various conditions. The study has three goals: to determine the degree to which forest types in Kumaun, in the Indian central Himalaya are differentiated by their degree and seasonal pattern of moisture stress; to determine mechanism of adaptation to drought by forest trees in Kumaun forests, and; to improve general understanding of the place of water relations in physiological ecology of forest trees, by providing data from forests in a climate seldom studied, and through exchange of information among scientists working in different climates. Measurements will be made of the degree of morning moisture stress across a range of forest types from 1000-2200 m elevation, and of the components of water potential and the degree of stomatal opening, during leaf development before the wet season begins, for mature leaves during the wet season, and for mature leaves during the dry season in fall and winter. Scope: This project complements research being made in other parts in the world on different climates, and provides information, not available, for temperate areas with a wet- summer, dry winter climate, and is necessary to eliminate the regional bias in models of adaptation to water availability. The work involves close collaboration, and division of work by the U.S. and the Indian scientists. It meets the objectives of this collaboration. ***