DISSERTATION RESEARCH: Riparian Tree Dynamics: Learning How to Restore Non-equilibrium Communities

论文研究：河岸树动力学：学习如何恢复非平衡群落

• 批准号: 0309135
• 负责人: John Battles
• 金额: $ 1.2万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-15 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0309135&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Riparian; Tree; Dynamics

River regulation in California's Central Valley has altered hydrologic conditions and impaired reproduction of riparian tree populations that evolved with pre-settlement cycles of flooding and summer drought. The goal of this research is to develop a predictive understanding of recruitment and survival of the cottonwoods and willow species that dominate the crucial initial phase of riparian community development. Targeted field studies and controlled experiments will be conducted to parameterize and validate a conceptual model of hydrogeomorphic, phenologic, and ecophysiological factors driving cottonwood and willow recruitment on the lower Tuolumne River, CA. The model integrates length of seed release and viability periods, field conditions of water table dynamics and soil moisture, and seedling survival thresholds in response to water table recession. The studies will provide quantitative information necessary for resource managers to model cost-effective strategies to restore natural recruitment processes to Central Valley riparian woodlands. This project is important scientifically because it tests a general conceptual model integrating hydrology, ecology, and ecophysiology in a non-equilibrium system within a field-based resource management context. Broader impacts of this project include optimizing reach-wide flow restoration scenarios, evaluating current floodplain restoration projects, disseminating results to agencies for restoration planning, and mentoring undergraduates in research methods.

在加州的中央谷的河流调节已经改变了水文条件和受损的河岸树木种群的繁殖，进化与前解决周期的洪水和夏季干旱。本研究的目标是开发一个预测性的理解，占主导地位的河岸社区发展的关键初始阶段的三角叶杨和杨柳物种的招聘和生存。 将进行有针对性的实地研究和对照实验，以参数化和验证水文地貌，物候和生理生态因素的概念模型驱动棉白杨和杨柳招聘下Tuolumne河，CA。 该模型集成了种子释放和生存期的长度，地下水位动态和土壤水分的田间条件，以及幼苗存活阈值响应地下水位衰退。 这些研究将为资源管理人员提供必要的定量信息，以建立成本效益高的战略模型，恢复中央谷河岸林地的自然补充过程。 这个项目在科学上是重要的，因为它测试了一个综合水文学，生态学和生态生理学的一般概念模型，在一个基于实地的资源管理背景下的非平衡系统。 该项目的更广泛的影响包括优化全流域流量恢复方案，评估当前的洪泛区恢复项目，向恢复规划机构传播结果，并指导本科生的研究方法。