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应用生态学报 ›› 2004, Vol. ›› Issue (11): 1989-1993.

• 研究论文 •    下一篇

卧龙自然保护区亚高山暗针叶林林隙特征研究

王微1, 陶建平1, 李宗峰1, 张炜银2, 丁易2   

  1. 1. 西南师范大学生命科学学院 三峡库区生态环境教育部重点实验室, 重庆 400715;
    2. 中国林业科学研究院 森林生态环境与保护研究所, 北京 100091
  • 收稿日期:2003-12-21 修回日期:2004-03-30
  • 通讯作者: 陶建平
  • 基金资助:
    国家重点基础研究发展规划项目(2002CB11150505);国家自然科学基金项目(30300047);中国科学院成都生物研究所恢复生态学开放基金(R0203);重庆市生态学重点学科资助项目

Gap features of subalpine dark coniferous forest in Wolong Nature Reserve

WANG Wei1, TAO Jianping1, LI Zongfeng1, ZHANG Weiyin2, DING Yi 2   

  1. 1. Key Laboratory of Eco-Environments of Three Gorges Reservoir Region, Ministry of Education, College of Life Science, Southwest China Normal University, Chongqing 400715, China;
    2. Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China
  • Received:2003-12-21 Revised:2004-03-30

摘要: 以卧龙亚高山暗针叶林为研究对象,分析了森林群落林隙的大小结构、形成方式及林隙形成木(GM)的结构特征.结果表明,林隙密度为18.5个·hm-2,冠林隙和扩展林隙分别占森林面积的28.4%和60.0%;冠林隙的大小变化在10~1 134.7 m2之间,平均面积为153.45m2;扩展林隙的大小变化在84.11~1 646.3 m2之间,平均面积为324.34 m2;平均每个林隙的形成木为5.14株,单株形成木形成的林隙只占8.1%.不同形成木类型对林隙形成的贡献大小次序为:折干>掘根>枯立>断梢;暗针叶林林隙大多由岷江冷杉、铁杉、糙皮桦形成.径级在60~70 cm,高度在30~35m之间的林冠上层的岷江冷杉,发生折倒形成林隙的可能性最大.

关键词: 卧龙, 亚高山暗针叶林, 林隙特征

Abstract: This paper studied the size structure and formation pattern of gaps and the characteristics of gap makers (GM) in subalpine dark coniferous forests in Wolong Giant Panda Nature Reserve,Sichuan Province,China.The results showed that the gap density was 18.5 per hm2,and the area of canopy gap and extended gap accounted for 28.4% and 60% of total forest area,respectively.Canopy gap varied from 10 m2 to 1 134.7 m2,and expanded gap varied from 84.11 m2 to 1 646.3 m2.Canopy gaps and expanded gaps had an average area of 153.45 m2 and 324.34 m2,respectively.The average number of gap makers (GM) per gap was 5.14,and only 8.1% of all gaps were created by just one GM.The order of GM contributed to gap formation was trunk snap > uproot > standing death > branch breakage.Abies faxoniana,Tsuga chinensis,and Betula utilis were the major gap makers,while Abies faxoniana in the canopy layer with 60~70 cm DBH and 30~35 m high had the greatest probability of gap making.

Key words: Wolong, Subalpine dark coniferous forests, Gap features

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