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: 0642550
• 负责人: Rafael Bras
• 金额: $ 32.24万
• 依托单位: Massachusetts Institute of Technology
• 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 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0642550&HistoricalAwards=false
• 关键词: Collaborative; Research; Co; Organization; River; 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.

地球表面的物理和生态过程本质上是耦合的。这项工作旨在测试以下假设：河流通过当地的非线性相互作用（植被，土壤和地形之间）组织，以使河网络的3-D结构以及植被的组织组织出现了可识别的全球模式。上述假设表明，植物网络响应植被的植被及其群体的结构，从而涉及植被的结构，从而涉及综合群体的结构，该植被构成了综合的综合构成组织的成果，该植被构成了组织的成果，该植被构成了成果的成果。建模将在来自两个不同草地的数据的上下文中使用。景观形态的共同进化及其植被模式将在随机气候强迫下进行研究，以及恒定且不同的构造隆起（或基本水平下降）。要解决的主要问题是：1）河流河流组织中是否有大规模的植被组织签名？ 2）在景观形态组织及其植被覆盖的组织中是否有任何全球战略？ 3）气候或隆升波动对植被自组织和侵蚀率对复杂自适应形态的影响是什么？ 4）诸如火灾和放牧之类的骚乱的影响是什么，结果将增加我们和世界上有限地区的草原和水有限地区的不断扩大的工作。它将为正在进行的生态系统监测工作中的科学和运营价值提供更多的科学和运营价值。这类研究的潜在回报包括与供水和质量以及生态系统健康和多样性有关的广泛社会和经济利益。这是一项高度跨学科的工作，将在基于物理的数字框架的umbrella下结合地球科学不同分支（即生态学，地貌，水文学）的研究结果。