RAPID: How Does Environmental Change Influence Landscape Evolution in the Pantanal Wetlands (Brazil)?

RAPID：环境变化如何影响潘塔纳尔湿地（巴西）的景观演变？

• 批准号: 1541247
• 负责人: Michael McGlue
• 金额: $ 5万
• 依托单位: University of Kentucky Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-07-15 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1541247&HistoricalAwards=false
• 关键词: RAPID; How; Does; Environmental; Change

A non-technical description of the project, which explains the project's significance and importanceThe Pantanal region of Brazil is a vast domain of headwater wetlands that represents a little-documented aspect in the evolution of river systems. These environments are extremely important for the ecological health of tropical rivers. The environment is sensitive to both climatic and environmental changes, but the degree to which these will affect the region is unknown. This project will examine lake cores collected from the region to establish a chronology of environmental change in the region that documents the response of the system to climate and can help evaluate the possible effects of human intervention. This is a collaborative project that is co-funded by the NSF Office of International Science and Engineering (OISE).A technical description of the projectThis RAPID project will examine how changing environmental conditions can (1) impact surface processes (e.g., erosion and weathering); and (2) influence landscape evolution in lowland tropical wetlands. The field site is the little- studied Pantanal of central South America. The Brazilian Pantanal offers an excellent example of extensive savanna-floodplain wetland development along several coalescing megafans (large distributive fluvial systems). The main objective of this research is to collect new lake sediment cores from a large floodplain lake in the northern Pantanal. Lake deposits are a potential archive of Quaternary landscape evolution, as the dynamics of sediment composition and accumulation are sensitive to environmental transitions. The project will use standard techniques to assess how the lake accumulates sediment today, and use these data as a framework for interpreting older material recovered from the lake cores.

该项目的非技术描述解释了该项目的意义和重要的巴西泛纳尔地区是雷德沃特湿地的广阔领域，它代表了河流系统发展中的一个有据可查的方面。这些环境对于热带河流的生态健康极为重要。环境对气候变化和环境变化都很敏感，但是影响该地区的程度尚不清楚。该项目将检查从该地区收集的湖泊核心，以建立该地区环境变化的年表，该地区记录了系统对气候的反应，并可以帮助评估人类干预的可能影响。这是一个由国际科学与工程办公室（OISE）共同资助的协作项目。项目快速项目的技术描述将研究不断变化的环境条件如何（1）影响表面过程（例如侵蚀和风化）； （2）影响低地热带湿地的景观演化。现场地点是南美中美洲的少量研究。巴西泛纳尔提供了一个很好的例子，讲述了沿几个合并的巨型杂货（大型分配河流系统）广泛的稀树草原湿地开发。 这项研究的主要目的是从北部的大型洪泛区湖中收集新的湖泊沉积物岩心。湖泊沉积物是第四纪景观演化的潜在档案，因为沉积物组成和积累的动力学对环境过渡敏感。该项目将使用标准技术来评估湖泊今天如何累积沉积物，并将这些数据用作解释从湖泊岩心回收的旧材料的框架。