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.，威斯康星大学麦迪逊分校CBET-0729838 Lundquist，Jessica D.，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，项目主任，[phone]气候变化将影响恢复工程实践，特别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中，例如沿着美国科迪勒拉山脉的山地草甸生态系统，那里越来越多的降水是以雨而不是雪的形式落下，积雪融化得更早，夏天更长更干燥这个合作项目的目标是调查的过程和空间和时间尺度影响草地生态系统的范围。利用加利福尼亚州约塞米蒂国家公园内仪器齐全的Tuolumne Meadows作为案例研究，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气象记录，3）在流域上运行分布式融雪和径流模型，以确定不同地区如何对气候变化作出反应，以及哪些地区最敏感，哪些地区最不敏感，4）将联合收割机模拟径流与穿过草地的水力路由模型相结合，以估计在进行和不进行各种恢复努力的情况下，河流水位将如何受到气候变化的影响，5）模拟整个草甸的地下水位如何响应河流水位的变化，以及6）模拟植被群落如何最有可能响应预计的地下水位变化。有必要为可持续的恢复工程建立科学基础，并明确考虑到气候变化。新的建模技术和联系将作为一个可转移的方法框架，可用于调查气候，水文和植被动态在其他地区和生态系统的相互关联的影响。该项目的教育效益包括对研究生和本科生的支持，以及为解说员和约塞米蒂国家公园游客提供的计划，约塞米蒂国家公园每年吸引约400万游客。调查结果还将在网上公布，供公众和资源管理人员查阅。