Community dynamics of evergreen broadleaf forests in southwestern Japan. I. Wind damaged trees and canopy gaps in an evergreen oak forest
Community dynamics of evergreen broadleaf forests in southwestern Japan. I. Wind damaged trees and canopy gaps in an evergreen oak forest
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日本西南部常绿阔叶林的群落动态。
DOI：
10.1007/bf02489476
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
Kazuo Naka
中科院分区：
文献类型：
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作者：
Kazuo Naka
在日本西南部的万年青橡树林中，通过对奈良市春日山森林保护区的样带中的乔木层、风害树和林冠空隙的数量和大小分布的研究，确定了树倒和林冠开放的速率。林隙总面积约占研究区陆地总面积的20%。林隙的年龄是通过计算林隙中各种树木的年轮来确定的。通过林隙年龄与气象资料的对比分析，林隙的形成主要是由强台风引起的。应用MNY方法计算了强台风访问保护区的平均时间间隔为6.57年，年平均树倒率和年平均树冠开口面积分别为0.84株/ha·年和55.6m2/ha·年。林冠层的平均停留时间约为180年。
The rates of treefall and canopy opening in the evergreen oak forest in southwestern Japan were determined by studying the number and size distribution of overstory trees, wind damaged trees, and canopy gaps in a belt transect in the Kasugayama Forest Reserve in Nara City.Thirty three percent of the overstory trees wereCastanopsis cuspidata. The total area of canopy gaps was about 20% of the total land area in the study area. The ages of the gaps were determined by counting the annual rings of various kinds of trees growing in gaps. By comparing gap ages with meteorological data, it became evident that gap formation was mainly caused by strong typhoons. The mean time interval between strong typhoons visiting the forest reserve, 6.57 years, was determined by applying the MNY method to the meteorological data.The treefall rate and the mean area of canopy openings per year were 0.84 overstory trees/ha·year and 55.6 m2/ha·year, respectively. The mean residence time of the forest canopy was about 180 years.