Characteristics of canopy interception loss in Moso bamboo forests of Japan
Characteristics of canopy interception loss in Moso bamboo forests of Japan
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DOI：
10.1002/hyp.9359
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发表时间：
2013-07
影响因子：
3.2
通讯作者：
Yoshinori Shinohara;H. Komatsu;Kohei Kuramoto;K. Otsuki
中科院分区：
文献类型：
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作者：
Yoshinori Shinohara;H. Komatsu;Kohei Kuramoto;K. Otsuki
近年来，日本的毛竹林迅速扩大，取代了周围的针叶林和/或阔叶林。为了评估由于这种替换而引起的林地产水量的变化，有必要研究毛竹林的蒸散量。然而，林冠截留损失，在森林地区蒸散的主要组成部分之一，已观察到只有两个在日本的毛竹林与相对较高的干密度（~7000茎/公顷）。事实上，有许多毛竹林的树干密度要低得多。因此，我们在毛竹林干密度为3611茎/公顷的降水（Pr），穿透雨（Tf）和茎流（Sf）观测1年，并量化冠层截留损失（Ic）。实验期的Pr和Ic分别为1636和166 mm，Ic/Pr为10%。该值与其他两种毛竹林的值大致相同，低于针叶林和阔叶林的值。另一方面，Tf/Pr和Sf/Pr为我们的森林（86%和4%，分别）约10%的Pr大于和小于其他两个毛竹林的值。这些结果表明，树干密度的差异极大地影响降水分配（即Tf/Pr和Sf/Pr），但不会极大地改变Ic/Pr。
In recent years, Moso bamboo (Phyllostachys pubescens) forests have rapidly expanded in Japan by replacing surrounding coniferous and/or broadleaved forests. To evaluate the change in water yield from forested areas because of this replacement, it is necessary to examine evapotranspiration for Moso bamboo forests. However, canopy interception loss, one of the major components of evapotranspiration in forested areas, has been observed in only two Moso bamboo forests in Japan with relatively high stem density (~7000 stems/ha). There are, in fact, many Moso bamboo forests with much lower stem density. Thus, we made precipitation (Pr), throughfall (Tf) and stemflow (Sf) observations for 1 year in a Moso bamboo forest with stem density of 3611 stems/ha and quantified canopy interception loss (Ic). Pr and Ic for the experimental period were 1636 and 166 mm, respectively, and Ic/Pr was 10%. The value was approximately the same as values for the other two Moso bamboo forests and lower than values for coniferous and broadleaved forests. On the other hand, Tf/Pr and Sf/Pr for our forest (86% and 4%, respectively) were approximately 10% of Pr larger and smaller than values for the other two Moso bamboo forests. These results suggest that the difference in stem density greatly affects precipitation partitioning (i.e. Tf/Pr and Sf/Pr) but does not greatly change Ic/Pr. Copyright © 2012 John Wiley & Sons, Ltd.