首页> 美国政府科技报告 >Region 6 Interim Old Growth Definition for Douglas-Fir Series, Grand Fir/White Fir Series, Interior Douglas Fir Series, LodgePole Pine Series, Pacific Silver Fir Series, Ponderosa Pine Series, Port-Orford-Cedar and Tanoak (Redwood) Series, Subalpine Fir Series and Western Hemlock Series
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Region 6 Interim Old Growth Definition for Douglas-Fir Series, Grand Fir/White Fir Series, Interior Douglas Fir Series, LodgePole Pine Series, Pacific Silver Fir Series, Ponderosa Pine Series, Port-Orford-Cedar and Tanoak (Redwood) Series, Subalpine Fir Series and Western Hemlock Series

机译:区域6道格拉斯 - 冷杉系列,大杉/白杉系列,内部道格拉斯冷杉系列,Lodgepole松系列,太平洋银杉系列,黄松系列,port-Orford-Cedar和Tanoak(红木)系列,亚高山的中期老生长定义杉木系列和西部铁杉系列

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The following describes the ecologically important structural features of old-growth ecosystems. Measurable criteria for these attributes will be established in more specific definitions for forest types, habitat types, plant associations, or groupings of them. The intent of the generic definition is to guide design of specific definitions and new inventories that include measurement of specific attributes. Although old-growth ecosystems may be distinguished functionally as well as structurally, this definition is restricted primarily to stand-level structural features which are readily measured in forest inventory.

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