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首页> 外文期刊>Western Journal of Applied Forestry >Analysis of Conifer Mortality in Colorado Using Forest Inventory and Analysis's Annual Forest Inventory
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Analysis of Conifer Mortality in Colorado Using Forest Inventory and Analysis's Annual Forest Inventory

机译：利用森林资源调查表和分析年度森林资源表分析科罗拉多州的针叶树死亡率

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摘要

Aerial detection surveys indicate that widespread conifer mortality has been steadily increasing in Colorado, particularly since 2002. The Forest Inventory and Analysis (FIA) annual inventory system began in Colorado in 2002, which coincided with the onset of elevated conifer mortality rates. The current mortality event coupled with collection of 6 years of annual inventory data provided an opportunity to test the usefulness of the FIA annual inventory system for quantifying rapid change in the conifer resource over a large geographic area. The estimate of conifer mortality during the 2002-2007 period indicated an average of 44 million trees that died each year, which represents more than twice the average recorded in the 1997-2002 period. The estimate of insect-killed lodgepole pine averaged 10.5 million trees during the 2002-2007 period, which represents a 10-fold increase compared with the estimate recorded for the 1997-2002 mortality period.
机译：空中侦查调查表明，科罗拉多州广泛的针叶树死亡率一直在稳步上升，尤其是自2002年以来。森林资源调查和分析（FIA）年度清单系统于2002年在科罗拉多州开始，恰逢针叶树死亡率上升的开始。当前的死亡事件与6年年度清单数据的收集相结合，提供了一个机会来测试FIA年度清单系统对量化大范围地理区域中针叶树资源的快速变化的有用性。对2002-2007年期间针叶树死亡率的估计表明，每年平均有4400万棵树死亡，这是1997-2002年期间记录的平均水平的两倍多。在2002-2007年期间，对昆虫杀死的寄宿松的估计数平均为1,050万棵树，比1997-2002年死亡率记录的估计数增加了10倍。

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