LTREB Renewal - Collaborative Research: Responses of high elevation, aquatic ecosystems to interannual climate variability and trends in atmospheric inputs

长期调查翡翠湖和邻近的湖泊和流域在塞拉内华达州（加州）正在改变我们的理解，山区生态系统如何应对全球变化。 拟议的研究将测试这样一个假设，即气候变化、雪情变化和大气成分变化正在推动高海拔生态系统的地球化学和生态变化。测试这一假设的数据将来自湖泊代谢的研究，湖泊浮游植物对变化的大气沉积物的反应的持续评估，气候变化与氮和磷的地球化学之间的耦合的持续研究，增强大气沉积物的测量，以及湖泊沉积物的古湖泊学研究。这项研究将建立在20多年的生物，气象，水文和化学测量在高海拔sites.Management的国家公园和荒野地区的山脉内华达州将受益于我们的研究结果。分析和重建将提供有价值的信息，联邦和国家的科学家长期湖泊的变化和未来可能的高海拔水生生态系统对气候变化的反应。本研究将为一名研究生在加州大学滨江在古气候学的跨学科研究和一名研究生在加州大学圣巴巴拉提供培训。为少数民族服务的高等院校将积极招收这些学生。与图拉雷县（中央谷农业区）的伍德莱克高中合作开发的一个强有力的推广项目将利用拟议的古调查和气候重建的实地经验和数据加以扩大。

Long-term investigation of Emerald Lake and neighboring lakes and watersheds in the Sierra Nevada (California) are transforming our understanding of how mountain ecosystems are responding to global change. The proposed research will test the hypothesis that altered climate, changing snow regime, and changes in atmospheric composition are driving biogeochemical and ecological changes in high elevation ecosystems. Data to test this hypothesis will come from studies of lake metabolism, continued assessment of the response of lake phytoplankton to changing atmospheric deposition, continued study of the coupling between climate variability and nitrogen and phosphorus biogeochemistry, enhanced measurements of atmospheric deposition, and paleolimnological study of lake sediments. This research will build on more than two decades of biological, meteorological, hydrological, and chemical measurements in high elevation sites.Management of National Parks and Wilderness Areas in the Sierra Nevada will benefit from the results of our research. The analyses and reconstructions will provide valuable information to Federal and State scientists on long-term lake changes and likely future responses of high elevation aquatic ecosystems to climate change. This research will provide training for one graduate student at UC Riverside in the interdisciplinary study of paleoclimatology and one graduate student at UC Santa Barbara. There will be active recruitment for these students at Minority Serving Institutions of higher learning. A strong outreach program developed with Woodlake High School in Tulare County (Central Valley agricultural region) will be expanded using field experiences and data from the proposed paleo-investigations and climate reconstructions.