The Geography and Dynamics of Forest Invasion, Montana

蒙大拿州森林入侵的地理和动态

• 批准号: 8711514
• 负责人: Katherine Hansen
• 金额: $ 7.81万
• 依托单位: Montana State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-08-01 至 1990-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8711514&HistoricalAwards=false
• 关键词: Geography; Dynamics; Forest; Invasion; Montana

This proposal will map and measure the rates and timing of conifer invasion of grasslands at lower timberline elevations along the western slope of the Madison Range in Montana. Conifer invasion is a recent phenomenon related to overgrazing, range deterioration, fire suppression, and good conifer seed crops in years of above-average precipitation. Modelling and understanding the relationships between human land use and the physical causes of conifer invasion will increase our understanding of ecosystem dynamics generally, and human impacts on vegetational succession in alpine regions more specifically. The changes that will be modelled and explained by the investigators have major implication for species diversity in the region as well as for rangeland policy and managment.

该提案将绘制和测量蒙大拿州麦迪逊山脉西坡林线海拔较低处针叶树入侵草原的速率和时间。 针叶树入侵是最近出现的一种现象，与过度放牧、范围恶化、灭火以及降水量高于平均水平年份的优质针叶树种子作物有关。 模拟和理解人类土地利用与针叶树入侵的物理原因之间的关系将增加我们对生态系统动态的总体理解，以及人类对高山地区植被演替的影响的更具体的理解。 研究人员将建模和解释的变化对该地区的物种多样性以及牧场政策和管理具有重大影响。