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性巴西潘塔纳尔地区是一大片源头湿地，代表了河流系统演变中鲜有记录的方面。这些环境对于热带河流的生态健康极其重要。该环境对气候和环境变化都很敏感，但这些变化对该地区的影响程度尚不清楚。该项目将检查从该地区收集的湖芯，以建立该地区环境变化的年表，记录系统对气候的响应，并有助于评估人类干预可能产生的影响。这是一个由 NSF 国际科学与工程办公室 (OISE) 共同资助的合作项目。该项目的技术描述该 RAPID 项目将研究不断变化的环境条件如何 (1) 影响地表过程（例如侵蚀和风化） ）； (2)影响低地热带湿地的景观演化。现场地点是南美洲中部很少被研究的潘塔纳尔湿地。巴西潘塔纳尔湿地提供了沿多个聚结巨型扇区（大型分布式河流系统）开发大片稀树草原洪泛区湿地的绝佳范例。 这项研究的主要目的是从潘塔纳尔湿地北部的一个大型漫滩湖泊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，因为沉积物成分和积累的动态对环境转变很敏感。该项目将使用标准技术来评估湖泊今天如何积累沉积物，并将这些数据用作解释从湖芯中回收的较旧材料的框架。