Simulated cavity tree dynamics under alternative timber harvest regimes
Simulated cavity tree dynamics under alternative timber harvest regimes
复制标题
替代木材采伐制度下的模拟空洞树动态
DOI：
10.1016/j.foreco.2004.02.008
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发表时间：
2004
影响因子：
3.7
通讯作者：
D. Larsen
中科院分区：
文献类型：
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作者：
Zhaofei Fan;S. Shifley;F. Thompson;D. Larsen
我们模拟洞树丰富的景观林分年龄类的函数和作为一个功能的总的立场大小类。我们探讨了5个木材采伐制度对洞树丰富度的影响，在东南部密苏里州，美国，通过连接林分水平洞树分布模型的景观年龄结构模拟的LANDIS模型。100多年来，除了同龄集约经营外，所有采伐制度下的平均穴层木密度都在不断增加。这在很大程度上是由于模拟开始时超过70年的许多林分的持续成熟。然而，与不收获（对照）制度相比，不等龄，混合，均匀年龄长轮伐期，均匀年龄密集收获制度减少洞树密度分别为9-11，11-13，15-18，和28- 34%，因为更多的老林分被砍伐。森林管理人员和规划人员可以利用这一信息来评价替代木材采伐制度的实际后果，并考虑是否需要采取诸如保护凹穴树等活动。
We modeled cavity tree abundance on a landscape as a function of forest stand age classes and as a function of aggregate stand size classes. We explored the impact of five timber harvest regimes on cavity tree abundance on a 3261ha landscape in southeast Missouri, USA, by linking the stand level cavity tree distribution model to the landscape age structure simulated by the LANDIS model. Over 100 years, mean cavity tree density increased constantly under all timber harvest regimes except for even-aged intensive management. This was due in large part to the continued maturation of the numerous stands that were >70 years old at the start of the simulations. However, compared to the no harvest (control) regime, the uneven-aged, the mixed, the even-aged long rotation, and the even-aged intensive harvest regimes reduced the cavity tree density by 9–11, 11–13, 15–18, and 28–34%, respectively, as more old stands were cut. Forest managers and planners can use this information to evaluate the practical consequences of alternative timber harvest regimes and consider the need for activities such as cavity tree retention.