生物多样性 ›› 2024, Vol. 32 ›› Issue (1): 23393.  DOI: 10.17520/biods.2023393

• 研究报告: 植物多样性 • 上一篇    下一篇

云南鸡足山亚热带半湿润常绿阔叶林20 ha动态监测样地木本植物生境关联与群落数量分类

张楚然1,2, 李生发3, 李逢昌3, 唐志忠3, 刘辉燕3, 王丽红3, 顾荣2, 邓云2,4,*(), 张志明1,5, 林露湘2,4   

  1. 1.云南大学生态与环境学院西南跨境生态安全教育部重点实验室, 昆明 650091
    2.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
    3.大理市余金庵国有林场, 云南大理 671009
    4.云南西双版纳森林生态系统国家野外科学观测研究站, 云南勐腊 666303
    5.云南大学生态与环境学院暨云南省高原山地生态与退化环境修复重点实验室, 昆明 650091
  • 收稿日期:2023-10-18 接受日期:2023-11-30 出版日期:2024-01-20 发布日期:2023-12-22
  • 通讯作者: *E-mail: dy@xtbg.org.cn
  • 基金资助:
    云南省基础研究专项重大项目(202101BC070002);云南省重点研发计划(202303AC100009);NSFC-云南联合基金(U1902203);东南亚生物多样性研究中心(151C53KYSB20200019);云南省科技厅科技人才与平台计划项目(202205AM070005)

Habitat association and community classification of woody plants in the 20 ha forest dynamics plot of subtropical semi-humid evergreen broad-leaved forest in the Jizu Mountains, Yunnan

Churan Zhang1,2, Shengfa Li3, Fengchang Li3, Zhizhong Tang3, Huiyan Liu3, Lihong Wang3, Rong Gu2, Yun Deng2,4,*(), Zhiming Zhang1,5, Luxiang Lin2,4   

  1. 1 Key Laboratory for Transboundary Ecosecurity of Southwest China of Ministry of Education, School of Ecology and Environmental Science, Yunnan University, Kunming 650091
    2 Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Scicences, Mengla, Yunnan 666303
    3 Yujin’an State-owned Forest Farm, Dali, Yunnan 671009
    4 National Forest Ecosystem Research Station at Xishuangbanna, Mengla, Yunnan 666303
    5 School of Ecology and Environmental Science & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming 650091
  • Received:2023-10-18 Accepted:2023-11-30 Online:2024-01-20 Published:2023-12-22
  • Contact: *E-mail: dy@xtbg.org.cn

摘要:

亚热带半湿润常绿阔叶林是中国西部中亚热带地区的地带性植被, 大理鸡足山是其连续分布面积最大的区域之一。本研究以云南鸡足山亚热带半湿润常绿阔叶林20 ha动态监测样地为研究对象, 分析了木本植物分布与生境的关联性, 并对其进行群落数量分类。结果表明: 该样地中共有43,424个DBH ≥ 1 cm的独立生长的木本植物个体, 分属31科57属92种。科的区系成分以热带为主, 占67.7%; 属的区系成分以温带为主, 占50.9%; 种的区系成分以中国特有种为主, 占42.4%。物种-生境关联分析的结果表明, 在52个目标物种中, 有44个物种至少与一种生境具有显著正关联, 有35个物种至少与一种生境具有显著负关联, 说明生境过滤在该样地的木本植物分布中具有重要作用。低海拔山谷是具有显著关联物种最多的生境, 反映了该生境对物种具有强烈的过滤作用。该样地的群落分类主要受凹凸度和海拔这两个地形因素的影响, 可分为3个群丛: (1)紫药女贞+五柱滇山茶-白柯+银木荷群丛(Ligustrum delavayanum+Camellia yunnanensis-Lithocarpus dealbatus+Schima argentea Association); (2)珍珠花+美丽马醉木-银木荷+白柯群丛(Lyonia ovalifolia+Pieris Formosa-Schima argentea+Lithocarpus dealbatus Association); (3)云南金叶子+云南越桔-白柯+银木荷群丛(Craibiodendron yunnanense+Vaccinium duclouxii-Lithocarpus dealbatus+Schima argentea Association)。本研究可为进一步开展亚热带半湿润常绿阔叶林的群落构建与物种共存研究提供科学基础。

关键词: 植物区系组成, 生境关联, 多元回归树, 群落分类, 亚热带半湿润常绿阔叶林, 鸡足山

Abstract

Aims: In western China, the subtropical semi-humid evergreen broad-leaved forest in Dali is one of zonal vegetation areas, with the largest continuous distribution in the Jizu Mountains. This study surveys the species composition, habitat association, and community types within a 20 ha forest dynamics plot, in order to lay a scientific foundation for the study of community assembly mechanisms and species coexistence within the subtropical semi-humid evergreen broad-leaved forests, and to provide a theoretical basis for biodiversity conservation in this kind of vegetational zone.

Methods: In 2021-2022, applying the protocol set forth by CTFS-ForestGEO, we established a 20 ha subtropical semi-humid evergreen broad-leaved forest dynamics plot in the Yujin’an State-owned Forest Farm in Dali, Yunnan Province. In this plot, all free-standing woody plants with DBH ≥ 1 cm were tagged, measured, and identified at the species level. Using the collected data, we analyzed floristic composition, community classification via a multivariate regression tree, and habitat association based on the spatial point pattern method.

Results: In the allotted zone, there were 43,424 individuals with DBH ≥ 1 cm, spanning 31 families with 57 genera and specific 92 species. The areal-type of families were predominantly tropical, which accounted for 67.7% of families; the areal-type of genera were predominantly temperate, which accounted for 50.9% of genera; and the areal-type of species were predominantly endemic (to China), which accounted for 42.4% of species. Among 52 targeted species, 44 had significant positive associations with at least one habitat and 35 had significant negative associations with at least one habitat. The habitat type with the largest amount of species significantly associated was low-altitude valleys. Within the forest dynamics plot, the community type was mainly affected by convexity and altitude, and could be divided into three associations: (1) Ligustrum delavayanum+Camellia yunnanensis-Lithocarpus dealbatus+Schima argenteaAssociation; (2) Lyonia ovalifolia+Pieris Formosa-Schima argentea+Lithocarpus dealbatusAssociation; (3) Craibiodendron yunnanense+Vaccinium duclouxii-Lithocarpus dealbatus+Schima argenteaAssociation.

Conclusion: Semi-humid evergreen broad-leaved forest is the representative vegetation of the plot, which is the horizontal zonal vegetation within the subtropical zone in western China. The vast majority of species in the plot have significant association with habitat, which suggests that habitat filtering plays an important role in the distribution of woody plants in this area. Topography dominates the classification of community types.

Key words: floristic composition, habitat association, multivariate regression tree, community classification, subtropical semi-humid evergreen broad-leaved forest, Jizhu Mountains