Collaborative Research: RUI: Landscape-level Controls on Terrestrial, Aquatic, and Wetland Responses to Climate Change in the Southern Canadian Arctic

将收集加拿大马尼托巴省北部许多相连的湖泊、湿地、高地冻土带和森林的广泛系列沉积物岩芯，并研究过去8000年来生态系统组成和功能的几个指标。尽管以前的研究已经显示出对北极变暖的生态响应，如湖泊生产力的增加、永久冻土融化、灌木扩张和亚北极乔木线的北移，但这些工作大多涉及对单一生态系统类型的研究，如陆地森林、湿地或湖泊。这项新研究的一个目标是研究过去这些生态系统之间的相互作用如何影响它们对过去气候变化的反应。一个生态系统的变化可能会影响其他生态系统对气候变化的反应，例如当森林和湿地的土壤径流改变了它们排入的湖泊的化学成分和生产力时。该项目将对确定北极生态系统未来因快速变暖而可能发生的变化具有重要意义。更好地了解这些生态系统之间的联系对于了解生态对北极生产力、营养循环或生物多样性的影响至关重要，并将有助于让科学界和公众了解气候变化、这种气候变化对北极人民的直接影响以及对碳循环和气候变暖的全球延伸影响。

An extensive series of sediment cores from many connected lakes, wetlands, and upland tundra and forests in northern Manitoba, Canada will be collected and examined for several indicators of ecosystem composition and function over the past 8000 years. Although ecological responses to Arctic warming have been shown in previous research, such as increases in lake productivity, permafrost thaw, shrub expansion, and northward shifts in the subarctic tree line, most of this work involves the study of a single ecosystem type, such as terrestrial forests, wetlands, or lakes. An objective of the new research is to examine how interactions among these ecosystems in the past have affected their responses to past climate change. Changes in one ecosystem may affect the response of others to climate change, such as when soil runoff from forests and wetlands alters the chemistry and productivity of the lakes into which they drain. This project will be significant for determining how Arctic ecosystems may change in the future as a result of rapid warming. A better understanding of the linkages among these ecosystems will be essential for understanding ecological impacts on productivity, nutrient cycles, or biodiversity in the Arctic and will help inform the scientific community and the public about climate change, the direct impacts of this climate change on the people of the Arctic and extended global impacts on the carbon cycle and climate warming.