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首页> 外文期刊>Journal of Environmental Management >Linking linear programming and spatial simulation models to predict landscape effects of forest management alternatives
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Linking linear programming and spatial simulation models to predict landscape effects of forest management alternatives

机译：链接线性规划和空间模拟模型以预测森林管理方案的景观影响

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Forest management planners require analytical tools to assess the effects of alternative strategies on the sometimes disparate benefits from forests such as timber production and wildlife habitat. We assessed the spatial patterns of alternative management strategies by linking two models that were developed for different purposes. We used a linear programming model (Spectrum) to optimize timber harvest schedules, then a simulation model (HARVEST) to project those schedules in a spatially explicit way and produce maps from which the spatial pattern of habitat could be calculated. We demonstrated the power of this approach by evaluating alternative plans developed for a national forest plan revision in Wisconsin, USA. The amount of forest interior habitat was inversely related to the amount of timber cut, and increased under the alternatives compared to the current plan. The amount of edge habitat was positively related to the amount of timber cut, and increased under all alternatives. The amount of mature northern hardwood interior and edge habitat increased for all alternatives, but mature pine habitat area varied. Mature age classes of all forest types increased, and young classes decreased under all alternatives. The average size of patches (defined by age class) generally decreased. These results are consistent with the design goals of each of the alternatives, but reveal that the spatial differences among the alternatives are modest. These complementary models are valuable for quantifying and comparing the spatial effects of alternative management strategies. (c) 2006 Elsevier Ltd. All rights reserved.
机译：森林管理计划者需要分析工具来评估替代策略对森林有时带来的不同利益（如木材生产和野生动植物栖息地）的影响。我们通过链接针对不同目的开发的两个模型来评估替代管理策略的空间模式。我们使用线性规划模型（Spectrum）优化木材采伐时间表，然后使用模拟模型（HARVEST）以空间明确的方式投影这些时间表，并生成可用来计算栖息地空间格局的地图。我们通过评估为美国威斯康星州的国家森林计划修订版开发的替代计划，证明了这种方法的力量。森林内部栖息地的数量与砍伐的木材数量成反比，与当前计划相比，在替代方案下增加了。边缘生境的数量与砍伐的木材数量成正相关，并且在所有替代方案下均增加。在所有其他选择下，成熟的北部硬木内部和边缘生境的数量均增加，但成熟的松树生境面积却有所不同。在所有替代方案下，所有森林类型的成熟年龄等级均增加，而年轻年龄等级则降低。补丁的平均大小（按年龄段定义）通常会减小。这些结果与每个替代方案的设计目标均一致，但表明替代方案之间的空间差异不大。这些互补模型对于量化和比较替代管理策略的空间效应非常有价值。 （c）2006 Elsevier Ltd.保留所有权利。

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