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: 0816991
• 负责人: Sara Hotchkiss
• 金额: $ 20.51万
• 依托单位: University of Wisconsin-Madison
• 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=0816991&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.

该项目利用湖泊沉积物中的花粉和木炭来探究土壤质地和防火带如何影响以橡树和松树为主的生态系统对过去 7000 年气候变化的反应。先前的结果表明，在过去的 2000 年里，威斯康星州西北部 450 平方公里的沙原上的植被和火灾状况非常动态。景观中的各个地点对相对较小的气候变化的反应不同。在小冰河时期，大多数地点的白松数量有所增加，这显然是由于土壤质地的细微差异以及湖泊和其他防火带的丰富性造成的。 目前的研究扩展了研究的时间段，以包括更极端的气候变化，并测试了关于土壤类型、防火带和植被反馈在确定当地植被响应方面的重要性的假设。预测当地植被对气候变化的响应是生态系统建模的一个重要目标。联邦、州和县机构正在积极参与所研究地区的松树林栖息地恢复，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与一个协作学习环境，其中将收集和解释环境变化长期记录的技能应用于有关生态系统管理的问题。