哀牢山中山湿性常绿阔叶林林窗特征研究

生态学杂志 ›› 2003, Vol. ›› Issue (3): 13-17.

哀牢山中山湿性常绿阔叶林林窗特征研究

李贵才^1,4, 何永涛^2,4, 韩兴国³

1. 中国科学院遥感应用研究所遥感信息科学开放实验室, 北京 100101;
2. 中国科学院地理科学与资源研究所, 北京 100101;
3. 中国科学院植物研究所数量植被开放实验室, 北京 100093;
4. 中国科学院西双版纳热带植物园, 昆明 650223

收稿日期:2001-11-27 修回日期:2002-12-08 出版日期:2003-03-10
基金资助:
中国科学院"九五"重大项目(KZ952-11-103);中国科学院知识创新重大项目(KZCX1-SW-01-02)

Features of gaps of middle mountain moist evergreen broad-leaved forest in Ailao Mountain

LI Guicai^1,4, HE Yongtao^2,4, HAN Xingguo³

1. Laboratory of Remote Sensing Information Science, Institute of Remote Sensing Application, Chinese Academy of Sciences, Beijing 100101, China;
2. Institute of Geographical Science and Natural Resource Research, Chinese Academy of Sciences, Beijing 100101, China;
3. Laboratory of Quantitative Vegetation, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;
4. Xishuangbanna Tropical Botanic Garden, Chinese Academy of Sciences, Kunming 650223, China

Received:2001-11-27 Revised:2002-12-08 Online:2003-03-10

摘要/Abstract

摘要： 本研究以哀牢山中山湿性常绿阔叶林为研究对象,分析了该植被群落林窗的大小结构及干扰形成等空间特征。研究表明,林窗大小取决于林窗形成方式和形成木的种类、大小。实际林窗面积远小于扩展林窗面积,前者的平均面积仅约为后者的33.2%。在数量上,实际林窗和扩展林窗的面积分布均呈以上小林窗为主的偏态分布。但在总的林窗面积比例上,大林窗的所占的面积比更大。实际林窗中,100～200m²的林窗所占面积比达66.4%。扩展林窗中,200～300m²和400～500m²大小的面积比分别为33.1%和20.6%。由于该地区冬季强劲的风力,林窗形成方式以根倒和折干,分虽占形成木总数的35%和28%。风力是哀牢山中山湿性常绿阔叶林林窗形成的主要外部驱动力。多数林窗由1～3株形成木造成的。林窗形成木的种类绝大多数为变色锥、木果柯和硬壳柯三种群落上层的优势树种。这三个树种约占林窗形成木的78%。因此,对于林窗发生这种中小尺度干扰事件,群落上层的成势树种起着决定性的影响作用。其它冠层水平的乔木(如亚冠层)的扰动也可以产生林窗,但所占比例很小。林窗形成木的径级呈明显的偏正态分布,且以21～40、41～60和61～80cm的径级最为普遍,分别占总数的31.6%、20.0%和18.3%。这种径级的偏正态分布于林窗面积偏态分布十分吻合,表明形成木的径级大小与所产生的林窗的面积大小呈正比。

关键词: 土壤有机碳储量, 土壤有机碳密度, 中国土壤数据库

Abstract: The size structure,disturbance character and forming character of canopy gaps were studied in middle mountain mosit evergreen broadleaf ved forest in Ailao Mountain,Yunnan Province,China.The results showed that the gap size depended on the forming modes of gaps, and the sizes and species of gap maker.The areas of actual gaps was enormously less than the one of extended gaps,and the average of the former was only 33.2% of the latter.The small gaps were main types for the actual and extended gaps.However,the total area of the large gaps was much more than the small gaps.For the actual gaps,the area of the gaps being more than 100～200 m² was about 66 4% of total area. for the extended gaps,the area of the gaps being more than 200～300 m² and 400～500 m² was about 33.1% and 20.6% of the total area. Due to the strong wind in winter, the uproot and snapping were the main types of gap makers,and respectively were 35% and 28% of total number of gap makers. The most gaps were formed of 1～3 gap makers which mostly consited of Castanopsis rufescens,Lithocarpus xylocarpus and Lithocarpus hancei. The three species constituted the 78% of the total gap makers.Under the middle or small scale disturbing, the main arboreal dominant species of upper communicate definitively influenced the gap forming.The distrbution of DBH classes of gap makers mostly varied over 21～40,41～60 and 61～80 cm.The amounts of them were about the 31.6%,20.0% and 18.3% of total amount,respectively. The distribution matched perfectly with the distribution of the gap areas.This indicated that the DHB calsses of the gap makers were closely related to the gap areas.

Key words: Soil organic carbon storage, Soil organic carbon density, China soil database

中图分类号:

Q948

李贵才, 何永涛, 韩兴国. 哀牢山中山湿性常绿阔叶林林窗特征研究[J]. 生态学杂志, 2003, (3): 13-17.

LI Guicai, HE Yongtao, HAN Xingguo. Features of gaps of middle mountain moist evergreen broad-leaved forest in Ailao Mountain[J]. cje, 2003, (3): 13-17.

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