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生态学杂志 ›› 2004, Vol. ›› Issue (3): 6-10.

• 研究报告 • 上一篇    下一篇

川西亚高山针叶林林窗特征的研究

鲜骏仁1,2, 胡庭兴2, 王开运1, 张远彬1   

  1. 1. 中国科学院成都生物研究所, 成都, 610041;
    2. 四川农业大学生态林业工程重点实验室, 雅安, 625014
  • 收稿日期:2002-12-24 修回日期:2003-04-16 出版日期:2004-06-10
  • 基金资助:
    国家自然科学基金重大项目(90202010);中国科学院“百人计划”项目(B010108)资助

Characteristics of gap in subalpine coniferous forest in western Sichuan

XIAN Junren1,2, HU Tingxing2, WANG Kaiyun1, ZHANG Yuanbin1   

  1. 1. Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041 China;
    2. Laboratory of Ecological Forestry Engineering, The Key Provincial Laboratory, Sichuan Agricultural University, Yaan 625014, China
  • Received:2002-12-24 Revised:2003-04-16 Online:2004-06-10

摘要: 为探讨川西亚高山针叶林的林窗干扰特征,对王朗自然保护区的这一植被类型进行了调查,分析了该类型森林中林窗的数量、大小、形状及其成因;林窗形成木(GM)的类型、数量和物种构成。结果表明,在川西亚高山原始针叶林林区,大多数形成木都是因树木达到一定年龄后衰老等原因引起其抗性下降而死亡的;由树木基折形成的林窗最为普遍,占51.23%,由干折形成的占20.37%;单株形成木林窗几乎达到所调查林窗的一半(占总数的46.99%),平均每个林窗拥有1.95株形成木。扩展林窗大小多在100~400m2,100~200m2所占的数量比例最大,占26.51%;而300~400m2所占的面积比例则最大,占22.64%。冠空隙的面积多在200m2以下,其中以50~100m2所占的数量比例和面积比例均为最大,分别为32.53%、17.72%。冠空隙、扩展林窗的平均面积为71.68m2、154.14m2

关键词: Pine wood nematode disease, Pathogenic bacteria, Complex infection

Abstract: In order to explore the characteristics of gap disturbance in subalpine primary coniferous forests in western Sichuan Province,the gaps in the primary coniferous forest at Dawodang in Wanglang Nature Reserve were surveyed and analyzed according to the quantity,size,type and factors of gap formation,the type,number,species composition of gap maker (GM).The results showed that most gap makers died due to their aging and the descending capabilities of counteracting disadvantageous surroundings.The most popular manner of gap formation in the forest was breakage at the base of gap makers (51.23% of the total).The second was breakage on trunk (20.37%).Almost half of the gaps were formed by one tree(46.99% of the total), with an average of 1.95 trees per gap.The size of most expanded gaps was in the range of 100~300 m2,the gaps of 100~200 m2 occupied the highest percentage in number (26.51% of the total),while those of 300~400 m2 occupied the highest percentage in size (22.64% of the total).The size of most canopy gaps was under 200 m2,the gaps of 50~100 m2 occupied the highest percentage in number and size (32.53% and 17.72% of the total).The average areas of canopy gap and expanded gap were 71.68 m2 and 154.14 m2,respectively.

Key words: Pine wood nematode disease, Pathogenic bacteria, Complex infection, Propagation

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