南京林业大学学报(自然科学版) ›› 2021, Vol. 45 ›› Issue (6): 159-168.doi: 10.12302/j.issn.1000-2006.202007039

• 研究论文 • 上一篇    下一篇

江苏宜兴龙池山自然保护区固定样地物种组成分析

伊贤贵1(), 董鹏1, 谢春平2, 彭智奇1, 杨国栋3, 董京京1, 钟育谦4, 翟飞飞4, 王贤荣1   

  1. 1. 南京林业大学生物与环境学院,南方现代林业协同创新中心,亚热带森林生物多样性保护国家林业与草原局重点实验室,江苏 南京 210037
    2. 广东海洋大学滨海农学院,广东 湛江 524088
    3. 江苏省环境科学研究院, 江苏 南京 210029
    4. 江苏省野生动植物保护站,江苏 南京 210036
  • 收稿日期:2020-07-19 接受日期:2021-08-28 出版日期:2021-11-30 发布日期:2021-12-02
  • 基金资助:
    绿色江苏专项资金项目;第二次全国重点保护野生植物资源调查专项资金项目;宜兴龙池山地带性植被动态固定样地建设项目

An analysis on species composition of a permanent plot on the Longchi Mountain, Yixing City, Jiangsu Province

YI Xiangui1(), DONG Peng1, XIE Chunping2, PENG Zhiqi1, YANG Guodong3, DONG Jingjing1, ZHONG Yuqian4, ZHAI Feifei4, WANG Xianrong1   

  1. 1. Co-Innovation Center for the Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Key Laboratory of National Forestry and Grassland Administration on Subtropical Forest Biodiversity Conservation, Nanjing 210037, China
    2. College of Coastal Agriculture Science, Guangdong Ocean University, Zhanjiang 524088, China
    3. Jiangsu Provincial Academy of Environmental Science, Nanjing 210029, China
    4. Jiangsu Wildlife Protection Station, Nanjing 210036, China
  • Received:2020-07-19 Accepted:2021-08-28 Online:2021-11-30 Published:2021-12-02

摘要: 目的 宜溧山地是江苏植物多样性及植被保护最好的地区之一,分析江苏宜兴龙池山固定样地的物种组成及群落垂直结构等基本特征,为该区域生物多样性保护、植被恢复策略制定以及生态服务功能的评估等提供参考。方法 按照CTFS(center for tropical forest science)的建设标准,在江苏省宜兴市龙池山自然保护区建立1 hm2(100 m×100 m)的森林监测固定样地。对样地内所有胸径(DBH)≥1 cm的木本植物进行了详细定位调查,并对其挂牌标记、定位和记录,并就群落物种组成、区系特征、重要值、群落垂直结构和径级特征进行了详细分析。结果 该固定样地内DBH≥1cm的木本植物共有4 944株,隶属于40科66属87种;其中樟科、壳斗科、金缕梅科、漆树科等占有较大优势。在属的水平上,温带区系成分占总属数的51.51%,热带区系成分占45.45%,区系具有过渡性。重要值≥1.00%的物种共有25个,占重要值总和的90%以上,其中山鸡椒、檵木、枹栎和野漆树的重要值较为突出,分别为12.65%、11.00%、7.89%和7.39%。根据群落高度可划分为4层,其中乔木Ⅱ层是当前群落的主体,乔木Ⅲ层较为拥挤。群落径级结构接近倒“J”形, 表明群落更新良好。结论 样地内木本植株数量较多,物种组成丰富,具有天然次生林特征;区系成分较为复杂,具有明显的过渡特征;植被正由常绿与落叶阔叶混交林向常绿阔叶林演替;减少人为干扰和生境破坏,是促进当前群落健康发展及物种多样性的关键。

关键词: 物种组成, 区系特征, 重要值, 群落结构, 龙池山, 江苏宜兴

Abstract:

【Objective】The plant diversity and vegetation are rich in the Yixing-Liyang mountainous, as they are among the best protected areas in Jiangsu Province. This study analyzed the basic characteristics of species composition and the community structure of permanent plots in Longchi Mountain of Yixing, which can provide a reference for the biodiversity protection, vegetation restoration strategy formulation, and ecological service function evaluation.【Method】Based on the protocols of the Center for Tropical Forest Science (CTFS), a 1 hm2 (100 m × 100 m) permanent plot was established in the Longchi Mountain Nature Reserve of Yixing City, Jiangsu Province, China, in 2019. All free-standing woody plants in the fixed plot with a diameter at breast height (DBH) ≥ 1 cm were mapped, tagged, measured, and recorded to species levels. Species composition, floristic features, importance values of families and species, the vertical structure of community, and DBH size class of overall target individuals were analyzed in detail. 【Result】Overall, 4 944 free-standing individuals with DBH ≥ 1 cm were documented, belonging to 87 species, 66 genera and 40 families. The dominant families were Lauraceae, Fagaceae, Hamamelidaceae and Anacardiaceae. At the genus level, tropical and temperate elements shared 51.51% and 45.45%, respectively, with a feature of floristic transition. There were 25 species with an importance value (SIV) ≥ 1% that contributed to 90% of the total SIV. The top four dominant species were Litsea cubeba, Loropetalum chinense, Quercus serrata and Toxicodendron succedaneum with SIV 12.65%, 11.00%, 7.89% and 7.39%, respectively. The community was divided into four layers based on the vertical structure of the plants. The main body of the community was in the layer Ⅱ, and the layer Ⅲ was relatively more crowded. The DBH distribution of all individuals in the plot showed a reversed “J” pattern, indicating a good regeneration. 【Conclusion】In the sampled plot, the number of trees was high and the species composition was rich. In addition, the floristics were complex. The current vegetation has distinct natural secondary forest and transitional properties. It is developing from the evergreen and deciduous broad-leaf mixed forest to the evergreen broad-leaf forest. To protect the species diversity and maintain community health development, it is critical to reduce human disturbances and habitat destructions.

Key words: species composition, floristic feature, importance value, community structure, Longchi Mountain, Yixing City, Jiangsu Province

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