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长白山温带森林不同演替阶段群落结构特征
引用本文:张春雨,赵秀海,赵亚洲.长白山温带森林不同演替阶段群落结构特征[J].植物生态学报,2009,33(6):1090-1100.
作者姓名:张春雨  赵秀海  赵亚洲
作者单位:(北京林业大学省部共建森林培育与保护教育部重点实验室,北京 100083)
基金项目:国家"十一五"科技支撑项,国家自然科学基金,国家林业局林业行业专项项目 
摘    要: 原始阔叶红松林是长白山西部地区的地带性顶级植被类型, 经采伐干扰或火烧破坏后形成大面积次生林。参照CTFS (Centre for Tropical Forest Science)样地建设技术规范, 于2005~2007年, 在长白山地区典型次生杨桦林、次生针阔混交林和椴树红松林内各建立了5.2 hm2 固定监测样地。调查并鉴定了样地内胸径大于1 cm的木本植物, 初步分析了森林监测样地的群落组成和种群结构, 并应用双相关函数g(r)分析了样地内5个优势树种的空间分布。结果表明: 次生杨桦林样地共监测木本植物32种, 20 949株活个体, 隶属于13科21属。次生针阔混交林样地共监测木本植物31个种, 14 725株活个体, 隶属于12科20属。椴树红松林样地共监测木本植物20个种, 12 062株活个体, 隶属于11科13属。次生杨桦林、次生针阔混交林及椴树红松林中胸径大于1 cm的木本植物胸高断面积之和分别为24.74、32.07和56.64 m2·hm–2。紫椴(Tilia amurensis)是长白山针阔混交林带的重要组成树种, 其重要值、胸高断面积在3个森林监测样地内均居于前列。白桦(Betula platyphylla)、山杨(Populus daviana)重要值和胸高断面积在次生杨桦林内均处于优势地位, 而在椴树红松林内优势地位为红松(Pinus koraiensis)等顶级树种所取代。次生杨桦林和次生针阔混交林中, 红松、色木槭(Acer mono)、臭松(Abies nephrolepis)、鱼鳞松(Picea jezoensis)和紫椴的径级结构均呈倒J型分布; 而椴树红松林内, 红松和紫椴的径级结构则呈单峰分布, 色木槭、臭松和鱼鳞松呈倒J型分布。g(r)分析表明长白山森林监测样地内5个优势树种的空间格局以聚集分布为主, 聚集强度在同种个体周围(r≤4 m)达到最大, 随着距离增加, 聚集强度逐渐减小。次生林中树种空间格局的环境解释量较高, 而椴树红松林中环境因子对树种空间分布的解释能力较差。

关 键 词:径级结构  分布格局  动态监测样地  环境解释

COMMUNITY STRUCTURE IN DIFFERENT SUCCESSIONAL STAGES IN NORTH TEMPERATE FORESTS OF CHANGBAI MOUNTAINS, CHINA
ZHANG Chun-Yu,ZHAO Xiu-Hai,ZHAO Ya-Zhou.COMMUNITY STRUCTURE IN DIFFERENT SUCCESSIONAL STAGES IN NORTH TEMPERATE FORESTS OF CHANGBAI MOUNTAINS, CHINA[J].Acta Phytoecologica Sinica,2009,33(6):1090-1100.
Authors:ZHANG Chun-Yu  ZHAO Xiu-Hai  ZHAO Ya-Zhou
Affiliation:Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083, China
Abstract:Aims The Changbai Mountains had a large area of undisturbed temperate old-growth forest that was partly destroyed by large-scale industrial logging at the turn of the 20th century and replaced by secondary forests and plantations. Our objective was to further understand ecosystem development, community composition and structure, and spatial distribution of major tree populations. Methods Three long-term 5.2 hm~2 forest plots were established in secondary Populus davidi-ana-Betula platyphylla forest (PBF), secondary conifer and broadleaved mixed forest (SCBMF) and Tilia amurensis-Pinus koraiensis mixed forest (TPMF) in the Changbai Mountains following the protocols of the Center for Tropical Forest Science forest dynamic plot. We tagged and recorded the species, diameter at breast height (DBH), height and crown diameter of all live and dead trees with DBH>1 cm. We determined the spatial distribution of five dominant canopy tree species by pair-correlation g(r) function and performed variation partitioning analysis to estimate the environmental effect on spatial distribution.Important findings We recorded 20 949, 14 725 and 12 062 live individuals and basal areas of 24.74, 32.07 and 56.64 m~2·hm~(-2) in PBF, SCBMF and TPMF, respectively. Tilia amurensis, with the overall highest importance value and basal area, was the major dominant tree species in SCBMF, P. davidiana and B. platyphylla dominated PBF and P. koraiensis dominated TPMF. In the secondary forests BPF and SCBMF, the size-class distribution of Pinus koraiensis, Acer mono, Abies nephrolepis, Picea jezoensis and Tilia amurensis showed the reverse J-shape form, whereas P. koraiensis and T. amurensis showed normal distributions in TPMF. Paired-correlation g(r) function showed that the main tree species had aggregated distributions, and the aggregation intensity decreased with the increasing distances. Environment variables had a strong effect on tree distribution, but the interpretation power of environment variables was very low in TPMF.
Keywords:size-class distribution  spatial distribution pattern  dynamic monitoring forest plot  environmental interpretation
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