Historic Expansion of Western Juniper on Near-Relict Sites: A Dendroecological Approach

西部杜松在近乎遗迹的历史性扩张：树木生态学方法

• 批准号: 9809245
• 负责人: Paul Knapp
• 金额: $ 19.04万
• 依托单位: Georgia State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-08-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9809245&HistoricalAwards=false
• 关键词: Historic; Expansion; Western; Juniper; Near

The research will explain the processes and controls on expansion of western juniper in the interior West. Tree-ring information, air photo interpretation, and field reconnaissance will be used to compare changes in western juniper establishment, cover, density, and growth rates on both semi-relict and nearby disturbed sites over a wide range of environmental settings. Expansion processes will be related to changes in climate, land use, and increased levels of atmospheric CO2. The study will record century-scale environmental changes within the western juniper community and will provide insight into how land-use history and climate change can influence biotic systems. Management decision regarding range lands in the Pacific Northwest will be informed by the results of this research.

本研究将解释西部内陆地区西部杜松扩张的过程和控制因素。树木年轮信息、航空照片解释和实地侦察将用于比较在大范围的环境设置中，在半废弃和附近受干扰的地点，西部杜松的建立、覆盖、密度和生长率的变化。扩张过程将与气候变化、土地利用和大气中二氧化碳含量的增加有关。这项研究将记录西部杜松群落的世纪尺度环境变化，并将深入了解土地利用历史和气候变化如何影响生物系统。这项研究的结果将为太平洋西北地区牧场的管理决策提供信息。