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Forest gap characteristic in a coniferous- Picea likiangensis forest in the Yulong Snow Mountain Natural Reserve, Yunnan Province, China.
Authors
刘庆
吴宁
吴彦
Publication date
1 June 2003
Publisher
Doi
Cite
Abstract
研究了玉龙雪山自然保护区云杉坪典型丽江云杉林林窗干扰的基本特征.结果表明,滇西北亚高山丽江云杉林林窗占林分面积比例冠层林窗和扩展林窗分别为28.8%和42.5%,干扰频率以林窗密度计算,林窗出现的平均密度为35个·hm~(-2)左右.林窗大小分布为面积大于100 m~2的大林窗约占25%,面积为50~100m~2的中等林窗占41%,面积小于50m2的小林窗占34%.形成林窗最重要的方式是干基和干中折断,其次是枯立.滇西北亚高山丽江云杉林林窗形成木80%以上是丽江云杉,通常直径为40~50cm、高度为15~25m.每个林窗形成木数量多为1~2株,约占68.8%,5株以上很少,最多为6株.随着林窗面积由大变小,林窗中更新苗木的密度逐渐变大,小林窗中更新木密度约为大林窗的5倍
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Last time updated on 31/03/2020