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应用生态学报 ›› 2016, Vol. 27 ›› Issue (11): 3403-3412.doi: 10.13287/j.1001-9332.201611.017

• •    下一篇

云南哀牢山和玉龙雪山森林树种幼苗对海拔梯度的响应及其季节性差异

李洁琼1,2*, 宋晓阳1,2, 曹敏1   

  1. 1中国科学院西双版纳热带植物园热带森林生态学重点实验室, 云南勐腊 666303;
    2中国科学院研究生院, 北京 100049
  • 收稿日期:2016-04-05 出版日期:2016-11-18 发布日期:2016-11-18
  • 通讯作者: E-mail: lijieqiong@xtbg.ac.cn
  • 作者简介:李洁琼,女,1989年生,硕士研究生.主要从事森林生态研究.E-mail: lijieqiong@xtbg.ac.cn
  • 基金资助:
    本文由国家重大科学研究计划项目(2014CB954100)、云南省应用基础研究计划项目(2014GA003)和中国科学院对外合作重点项目(GJHZ201317)资助

Response of tree seedlings to altitudinal gradient and its seasonal variation in Ailao Mountain and Yulong Mountain, Yunnan Province, China.

LI Jie-qiong1,2*, SONG Xiao-yang1,2, CAO Min1   

  1. 1Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, Yunnan, China;
    2University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-04-05 Online:2016-11-18 Published:2016-11-18
  • Contact: E-mail: lijieqiong@xtbg.ac.cn
  • Supported by:
    This work was supported by the National Major Scientific Research Project (2014CB954100), the Applied Fundamental Research Foundation of Yunnan Province (2014GA003), the Key Project of International Cooperation of Chinese Academy of Sciences (GJHZ201317).

摘要: 林下树种幼苗是森林生态系统的一个重要组成部分,在森林的自然更新过程中发挥着重要作用.为了解树种幼苗的海拔分布格局以及森林群落林下幼苗对季节性气候的响应,本研究调查了云南省哀牢山(亚热带)和玉龙雪山(亚高山)两个地区的林下树种幼苗物种组成及个体数量的海拔分布格局及其季节动态.结果表明:随着海拔的升高,两个山体的树种幼苗物种丰富度均先增加后下降,优势种也呈现明显的变化;雨季末期的幼苗物种丰富度明显大于旱季末期,其中,占据优势地位的物种具有较明显的季节性差异;不同海拔带树种幼苗优势种也具有显著差异.

关键词: 树种幼苗, 季节差异, 海拔梯度

Abstract: Tree seedlings under forests serve as an important part of forest ecosystem and play a role in the natural regeneration of forests. To understand the altitudinal distribution patterns of tree seedlings and the response to seasonal variation, we investigated the species composition and individual numbers of tree seedlings, and their seasonal dynamics in Ailao Mountain (subtropical region) and Yulong Mountain (subalpine region) in Yunnan Province. The results showed that the species richness of tree seedlings increased with altitude, peaked in the middle of the mountains, and followed a decline at higher altitudes, and the dominant species also changed significantly. Species richness of tree seedlings was significantly higher at the end of rainy season than that at the end of dry season, and the dominant species had obvious seasonal difference.

Key words: altitudinal gradient, seasonal variation, tree seedlings