Collaborative Research: Co-Organization of River Basin Geomorphology and Vegetation

合作研究：流域地貌与植被的协同组织

• 批准号: 0642517
• 负责人: Ignacio Rodriguez-Iturbe
• 金额: $ 23.86万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0642517&HistoricalAwards=false
• 关键词: Collaborative; Research; Co; Organization; River

Physical and ecological processes of the earth surface are intrinsically coupled. This work seeks to test the following hypothesis: River basins organize through local non-linear interactions (between vegetation, soils and topography) in such a way that identifiable global patterns emerge on the 3-D structure of the river network and on the organization of vegetation.The above hypothesis suggests a vegetation-modulated erosion in response to stochastic climatic forcing that involves a co-organization of the structure of the river network and the vegetation of the basin. Modeling will be used within the context of data from two different grass dominated sites. The co-evolution of landscape morphology and its vegetation patterns will be studied under stochastic climate forcing, and constant and varying tectonic uplift (or base level drop). The major questions to be addressed are: 1) Are there any large-scale signatures of vegetation organization in river basins? 2) Is there any global strategy in the organization of landscape morphology and its vegetation cover? 3) What is the impact of climate or uplift fluctuations on vegetation self-organization and erosion rates on a complex adaptive topography? 4) What is the effect of disturbances such as fire and grazing on the co-organizationThe results will add to an expanding body of work in grasslands and water limited regions of US and the world. It will provide added scientific and operational value to the ongoing ecosystem monitoring efforts in grasslands in United States. The potential payoff of this type of research includes broad social and economic benefits related to water supply and quality as well as ecosystem health and diversity.This is a highly interdisciplinary effort that will combine research results from different branches of earth sciences (i.e., ecology, geomorphology, hydrology) under the umbrella of a physically-based numerical framework.

地球表面的物理过程和生态过程是内在耦合的。这项工作旨在检验以下假设：河流流域通过局部非线性相互作用组织起来（在植被之间，土壤和地形），在这样一种方式，可识别的全球格局出现在三维结构的河流网络和组织的植被。上述假设表明，植被调制侵蚀响应随机气候强迫，涉及一个共同的，组织的河流网络和流域植被的结构。建模将在两个不同的草为主的网站的数据的背景下使用。将研究在随机气候强迫、持续和变化的构造抬升（或基准面下降）条件下景观形态及其植被格局的共同演变。主要的问题是：1）是否有任何大规模的植被组织在流域的签名？2)在景观形态及其植被覆盖的组织方面是否有任何全球战略？3)在复杂的适应性地形上，气候或隆升波动对植被自组织和侵蚀速率的影响是什么？4)火灾和放牧等干扰对合作组织的影响是什么？这些结果将增加美国和世界上草原和水资源有限地区的工作。它将为美国正在进行的草原生态系统监测工作提供额外的科学和业务价值。这类研究的潜在回报包括与供水和水质以及生态系统健康和多样性有关的广泛社会和经济效益。这是一项高度跨学科的努力，将联合收割机结合地球科学不同分支的研究成果（即，生态学、地貌学、水文学），并以物理学为基础的数值框架。