Collaborative Research: Mountain Meadow Restoration with a Changing Climate

合作研究：气候变化下的山地草甸恢复

• 批准号: 0729838
• 负责人: Steven Loheide
• 金额: $ 21.25万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0729838&HistoricalAwards=false
• 关键词: Collaborative; Research; Mountain; Meadow; Restoration

Loheide, Steven P., PIUniversity of Wisconsin-MadisonCBET-0729838Lundquist, Jessica D., PIUniversity of WashingtonCBET-0729830Collaborative Research: Mountain Meadow Restoration with a Changing ClimateCindy M. Lee, Program Director, [phone] Climate change will affect restoration engineering practices especially in ecosystems that depend on snowmelt and groundwater to provide moisture through the growing season, such as mountain meadow ecosystems along the American Cordillera, where an increasing percentage of precipitation is falling as rain rather than snow, snow that does accumulate is melting earlier, and summers are longer and drier. The goal of this collaborative project is to investigate the range of processes and spatial and temporal scales affecting a meadow ecosystem. Using the well-instrumented Tuolumne Meadows in Yosemite National Park, CA, as a case study, the project team will 1) downscale future climate model scenarios to the study area, 2) use the expected statistical shifts in temperature and precipitation to adjust the historic meteorological record to one that is expected in the future, 3) run a distributed snowmelt and runoff model over the basin to determine how different areas respond to climatic shifts and which areas are most and least sensitive, 4) combine simulated runoff with a hydraulic routing model through the meadow to estimate how stream water levels will be affected by climate change with and without various restoration efforts, 5) model how groundwater levels throughout the meadow will respond to shifts in stream level, and 6) model how vegetation communities are most likely to shift in response to projected water table changes. There is a need to develop the scientific basis for sustainable restoration engineering with explicit consideration of climate change. The new modeling techniques and linkages will serve as a framework for a transferable methodology that can be used to investigate the interrelated effects of climate, hydrology, and vegetation dynamics in other regions and ecosystems. Educational benefits of this project include support for graduate and undergraduate students as well as programs for interpretative rangers and visitors to Yosemite National Park, which attracts about 4 million visitors each year. Results will also be posted online for the general public and resource managers.

Loheide, Steven P., PI 威斯康星大学麦迪逊分校 CBET-0729838Lundquist, Jessica D., PI 华盛顿大学 CBET-0729830 合作研究：气候变化下的山地草甸恢复 Cindy M. Lee，项目总监，[phone] 气候变化将影响恢复工程实践，尤其是在 依赖融雪和地下水在整个生长季节提供水分的生态系统，例如美国科迪勒拉山脉沿线的山地草甸生态系统，其中越来越多的降水以雨而非雪的形式降落，积雪融化得更早，夏季更长、更干燥。该合作项目的目标是调查影响草地生态系统的过程范围以及时空尺度。以加利福尼亚州优胜美地国家公园内仪器齐全的图奥勒米草甸为案例研究，项目团队将 1) 将未来气候模型情景缩小到研究区域，2) 使用温度和降水的预期统计变化将历史气象记录调整为未来预期的记录，3) 在流域内运行分布式融雪和径流模型，以确定不同区域对气候变化的反应以及哪些区域影响最大和最小 敏感，4) 将模拟径流与穿过草地的水力路径模型相结合，以估计在有或没有各种恢复工作的情况下溪流水位将如何受到气候变化的影响，5) 模拟整个草地的地下水位将如何响应河流水位的变化，以及 6) 模拟植被群落最有可能如何变化以响应预计的地下水位变化。需要为可持续恢复工程建立科学基础，并明确考虑气候变化。新的建模技术和联系将作为可转移方法的框架，可用于研究其他区域和生态系统中气候、水文和植被动态的相互关联影响。该项目的教育效益包括为研究生和本科生提供支持，以及为约塞米蒂国家公园的讲解员和游客提供项目，该公园每年吸引约 400 万游客。结果还将在线发布给公众和资源管理者。