Collaborative Research: The effect of landscape context on the sensitivity of vegetation to climate change

合作研究：景观环境对植被对气候变化敏感性的影响

• 批准号: 0816557
• 负责人: Elizabeth Lynch
• 金额: $ 10.21万
• 依托单位: Luther College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0816557&HistoricalAwards=false
• 关键词: Collaborative; Research; effect; landscape; context

This project uses pollen and charcoal in lake sediments to ask how soil texture and firebreaks influenced the response of oak- and pine-dominated ecosystems to climatic changes of the past 7000 years. Previous results demonstrate that during the last 2000 years the vegetation and fire regimes on a 450 square kilometer sand plain in northwestern Wisconsin were remarkably dynamic. Individual sites within the landscape responded differently to relatively small climatic changes. White pine increased during the Little Ice Age at most sites, apparently due to slight differences in soil texture and the abundance of lakes and other firebreaks. The current research extends the time period studied to include more extreme climatic changes, and tests hypotheses about the importance of soil types, firebreaks, and vegetation feedbacks in determining the response of local vegetation. Predicting the response of local vegetation to climate change is an important goal of ecosystem modeling. Federal, state and county agencies are actively engaged in pine barrens habitat restoration in the area being studied, and the results of this work will be directly applicable to establishing realistic restoration goals and management strategies. Students from Luther College, the University of Minnesota, and the University of Wisconsin will participate in a collaborative learning environment in which skills in collection and interpretation of long-term records of environmental change are applied to questions about ecosystem management.

该项目使用湖泊沉积物中的花粉和木炭来询问土壤质地和防火场如何影响橡树和松树主导的生态系统对过去7000年的气候变化的反应。先前的结果表明，在过去的2000年中，威斯康星州西北部450平方公里沙平原上的植被和火势非常动态。景观中的各个地点对相对较小的气候变化的反应不同。在大多数冰河时代，白松树在大多数地点增加，这显然是由于土壤质地略有差异以及湖泊和其他壁炉的差异。 当前的研究延长了研究的时间段，包括更多极端的气候变化，并测试了关于土壤类型，防火和植被反馈在确定当地植被反应中的重要性的假设。预测当地植被对气候变化的反应是生态系统建模的重要目标。联邦，州和县机构积极参与正在研究的地区的松木贫瘠的栖息地恢复，这项工作的结果将直接适用于建立现实的恢复目标和管理策略。 来自路德学院，明尼苏达大学和威斯康星大学的学生将参加协作学习环境，在该环境中收集和解释环境变化的长期记录的技能适用于有关生态系统管理的问题。