Distribution and invasion of Phyllostachys pubescens stands into neighboring forests in Nasukarasuyama, Tochigi Prefecture.
Distribution and invasion of Phyllostachys pubescens stands into neighboring forests in Nasukarasuyama, Tochigi Prefecture.
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毛竹对栃木县那须乌山邻近森林的分布和入侵。
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
T. Ohkubo
中科院分区：
文献类型：
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作者：
H. Akutsu;M. Aizawa;K. Matsue;T. Ohkubo
本研究旨在描述毛竹林入侵对邻近森林的影响，在大竹-俊茂，那须原山，栃木县。利用1975年和2004年的航空照片，绘制了竹林分布图，并对29年来竹林面积的变化进行了评估。并对毛竹林分侵入相邻林分前沿的林分结构进行了调查。地图显示，毛竹林分约占该地区竹林的35%.航片分析表明，毛竹林分总面积的范围没有明显扩大。但在个别林分中，也观察到毛竹侵入相邻林分的现象。对入侵前沿林分结构和空间分布的分析表明，直径小于10 cm的阔叶树大部分趋于枯死。毛竹秆的侵入破坏了光环境，是造成林木枯死的主要原因。入侵还导致了树种多样性的降低，部分入侵林分的物种组成发生了变化。总之，毛竹的入侵导致了林分中低于入侵秆的树木枯死，降低了林分的物种多样性。
This study aimed to delineate the effect of invasion of Phyllostachys pubescens stands into neighboring forests in Ohgisu-Toshimo, Nasukarasuyama, Tochigi Prefecture. We made a distribution map of bamboo stands and assessed the changes for 29 years of the stand area using aerial photographs taken in 1975 and 2004. We also surveyed the stand structures at the front of invasion of the P. pubescens stands into adjacent forests. The map indicated that P. pubescens stands occupied approximately 35 % of the bamboo stands in the area. The analysis of aerial photographs showed none of significant range expansion of total area of P. pubescens stands. However, in some individual stands invasion of P. pubescens into neighboring forests were observed. Analyses of stand structure and spatial distribution at the front of the invasion indicated that the broad-leaved trees with less than 10 cm of diameter largely tended to be dead. The dead of trees might be mainly caused by the deterioration of light condition by the invasion of P. pubescens culms. The decrease of tree species diversity was also occurred by the invasion and the change of species composition was observed in some invaded stands. In conclusion, the invasion of the P. pubescens led to the dieback of trees lower than invaded culms and reduced tree species diversity in the stands.