Collaborative Research: Climate and the Expansion of the Boreal Forest at a Latitudinal Treeline: A Field-and Model-Based Investigation

合作研究：气候和纬度林线上北方森林的扩张：基于实地和模型的调查

• 批准号: 9731717
• 负责人: Andrea Lloyd
• 金额: $ 25.48万
• 依托单位: Middlebury College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-06-15 至 2004-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9731717&HistoricalAwards=false
• 关键词: Collaborative; Research; Climate; Expansion; Boreal

ABSTRACT OPP-9731717 OPP-9732017 LLOYD, ANDREA FASTIE, LLOYD MIDDLEBURY COLLEGE UNIVERSITY OF WYOMING OPP-9732057 STARFIELD, ANTHONY UNIVERSITY OF MINNESOTA The project will examine the role of northward movement of boreal forests in response to warmer climates under a global change scenario. The expansion of forests into areas currently covered by tundra will cause climate feedbacks due to the greater uptake of carbon, water, and energy by trees compared to tundra. Therefore a climate shift to warmer temperatures resulting from an increased concentration of carbon dioxide could result in an expansion of forests that mitigate the increase by absorbing a greater amount of the carbon dioxide than the tundra replaced by the forest. The investigators will examine the ecological response of treeline to the post-glacial warming as an example of a warming response. They also will examine the ecological response time of forestation following forest fires in order to determine the pace of forest regeneration as a proxy for treeline movement.

摘要 OPP-9731717 OPP-9732017 LLOYD, ANDREA FASTIE，怀俄明州劳埃德米德伯里学院 OPP-9732057 STARFIELD，明尼苏达州安东尼大学 该项目将研究全球变化情景下北方森林北移对气候变暖的影响。 森林向目前苔原覆盖的地区扩张将引起气候反馈，因为与苔原相比，树木对碳、水和能量的吸收更大。 因此，由于二氧化碳浓度增加而导致气候变暖，可能会导致森林扩张，森林比被森林取代的苔原吸收更多的二氧化碳，从而减缓了森林的扩张。 研究人员将研究林线对冰川后变暖的生态反应，作为变暖反应的一个例子。 他们还将检查森林火灾后造林的生态响应时间，以确定森林再生的速度作为林线移动的指标。