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首页> 外文期刊>Ecosystems >The Relative Impact of Harvest and Fire upon Landscape-Level Dynamics of Older Forests: Lessons from the Northwest Forest Plan
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The Relative Impact of Harvest and Fire upon Landscape-Level Dynamics of Older Forests: Lessons from the Northwest Forest Plan

机译：采伐和火灾对老龄森林景观水平动态的相对影响：西北森林计划的教训

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摘要

Interest in preserving older forests at the landscape level has increased in many regions, including the Pacific Northwest of the United States. The Northwest Forest Plan (NWFP) of 1994 initiated a significant reduction in the harvesting of older forests on federal land. We used historical satellite imagery to assess the effect of this reduction in relation to: past harvest rates, management of non-federal forests, and the growing role of fire. Harvest rates in non-federal large-diameter forests (LDF) either decreased or remained stable at relatively high rates following the NWFP, meaning that harvest reductions on federal forests, which cover half of the region, resulted in a significant regional drop in the loss of LDF to harvest. However, increased losses of LDF to fire outweighed reductions in LDF harvest across large areas of the region. Elevated fire levels in the western United States have been correlated to changing climatic conditions, and if recent fire patterns persist, preservation of older forests in dry ecosystems will depend upon practical and coordinated fire management across the landscape.
机译：在许多地区，包括美国西北太平洋地区，在景观一级保护旧森林的兴趣已经增加。 1994年的西北森林计划（NWFP）大大减少了联邦土地上旧森林的采伐。我们使用历史卫星图像来评估这种减少的影响，涉及以下方面：过去的采伐率，非联邦森林的管理以及火势的增长。 NWFP之后，非联邦大直径森林（LDF）的采伐率下降或保持较高水平，这意味着覆盖该地区一半的联邦森林采伐量减少，导致该地区的损失显着下降LDF收获。然而，在该区域大面积地区，因林火而造成的损失损失增加，远远超过了林果减少的收成。美国西部的火势升高与气候条件的变化有关，如果最近的火势持续存在，干燥生态系统中较老森林的保护将取决于整个景观的实际和协调的火势管理。

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  • 来源
    《Ecosystems》 |2008年第7期|1106-1119|共14页
  • 作者

    Sean P. Healey; Warren B. Cohen; Thomas A. Spies; Melinda Moeur; Dirk Pflugmacher; M. German Whitley; Michael Lefsky;

  • 作者单位

    U.S. Department of Agriculture Forest Service Rocky Mountain Research Station 507 25th St. Ogden Utah 84401 USA;

    U.S. Department of Agriculture Forest Service Pacific Northwest Research Station 3200 SW Jefferson Way Corvallis Oregon 97331 USA;

    U.S. Department of Agriculture Forest Service Pacific Northwest Research Station 3200 SW Jefferson Way Corvallis Oregon 97331 USA;

    U.S. Department of Agriculture Forest Service Region 6 P.O. 3623 Portland Oregon 97208 USA;

    Oregon State University Corvallis Oregon 97331 USA;

    U.S. Department of Agriculture Forest Service Pacific Northwest Research Station 3200 SW Jefferson Way Corvallis Oregon 97331 USA;

    Colorado State University Fort Collins Colorado 80523 USA;

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  • 正文语种 eng
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  • 关键词

    disturbance; fire; landsat; forest management; Northwest Forest Plan; old growth;

    机译：扰动;火灾;陆地卫星;森林管理;西北森林计划;旧生长;

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