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应用生态学报 ›› 2019, Vol. 30 ›› Issue (10): 3356-3366.doi: 10.13287/j.1001-9332.201910.005

• 研究论文 • 上一篇    下一篇

辽东山区次生林乔木优势树种幼苗更新动态

蔡军奇1, 王品2, 刘大鹏3, 白雪娇1,4*, 张淑媛1, 宗国1, 刘佳1   

  1. 1沈阳农业大学林学院, 沈阳 110866;
    2辽宁省森林经营研究所, 辽宁丹东 118002;
    3本溪满族自治县兰河峪林场, 辽宁本溪 117103;
    4中国科学院清原森林生态系统观测研究站, 沈阳 110016
  • 收稿日期:2019-06-04 出版日期:2019-10-20 发布日期:2019-10-20
  • 通讯作者: *E-mail: baixuejiao@syau.edu.cn
  • 作者简介:蔡军奇, 男, 1993年生, 硕士研究生. 主要从事群落生态学研究. E-mail: caijqi@163.com
  • 基金资助:
    国家重点研发计划项目子课题(2017YFC050410501)、国家自然科学基金项目(31300378)和辽宁省农业领域青年科技创新人才培养计划项目(2015047)资助

Seedlings regenerative dynamics of dominant trees in a secondary forest in montane region of eastern Liaoning Province, China

CAI Jun-qi1, WANG Pin2, LIU Da-peng3, BAI Xue-jiao1,4*, ZHANG Shu-yuan1, ZONG Guo1, LIU Jia1   

  1. 1College of Forestry, Shenyang Agricultural University, Shenyang 110866, China;
    2Institute of Forest Management in Liaoning Province, Dandong 118002, Liaoning, China;
    3Benxi Manzu Autonomous County Lanhe Valley Forest Farm, Benxi 117103, Liaoning, China;
    4Qingyuan Forest Ecosystem Observation Station, Chinese Ecosystem Research Network, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2019-06-04 Online:2019-10-20 Published:2019-10-20
  • Contact: *E-mail: baixuejiao@syau.edu.cn
  • Supported by:
    This work was supported by the Sub-project of National Key R&D Program of China (2017YFC050410501), the National Natural Science Foundation of China (31300378) and the Cultivation Plan for Youth Agricultural Science and Technology Innovative Talents of Liaoning Pro-vince (2015047).

摘要: 以辽东山区次生林4 hm2动态监测样地为平台,2014—2016年连续3年对样地进行乔木优势树种幼苗调查和半球面影像拍摄,分析森林更新过程中林下乔木幼苗和冠层结构的动态,研究幼苗的天然更新规律及其对冠层结构变化(以叶面积指数LAI的变化来表示)的响应.结果表明: 调查期间冠层LAI先减少后增加,且存在显著的年际差异.12种乔木优势树种幼苗对冠层结构变化存在明显的响应,且不同树种幼苗的响应明显不同;中性树种幼苗的相对多度或频度一般会随着冠层LAI的减小而增大;阳性树种幼苗的相对多度或频度一般会随着冠层LAI的增大而减小.2014—2016年乔木优势树种幼苗的多响应置换过程分析表明,优势树种幼苗的数量组成和分布存在显著差异,且年际间的差异逐渐减少.调查期间优势树种幼苗指示种发生明显变化,也反映出其对冠层结构变化的响应.

Abstract: To reveal the seedlings dynamics of dominant trees and their response to canopy changes (as indicated by changes in leaf area index), we analyzed the seedlings dynamics of dominant trees and canopy structure during forest regeneration based on three-year (2014 to 2016) censuses and hemispherical photography in a 4 hm2 forest dynamics monitoring plot. The results showed that canopy LAI first decreased and then increased during the survey period, with significant interannual difference. The seedlings of 12 dominant tree species showed notable response to the change of canopy structure, with the response varying among different tree species. The relative abundance or frequency of seedlings for neutral tree species generally increased with the decreases of canopy LAI. The relative abundance or frequency of seedlings of light-demanding tree species generally decreased with the increases of canopy LAI. In multi-response permutation procedures by analyzing the numeric composition and distribution of dominant tree seedlings, there was significant difference among the three censuses. Such interannual difference gradually decreased from 2014 to 2016. Significant change occurred in the indicator species of dominant tree seedlings, reflecting their responses to the changes of canopy structure.