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阔叶红松林是我国东北东部山区的地带性植被,长白山区是阔叶红松林的核心分布区.由于人类活动的干扰,目前天然阔叶红松林只在长白山和小兴安岭地区残留了一些面积不等的片段.为比较分析阔叶红松林在不同分布区的异同,以广义长白山区阔叶红松林残留片段为研究对象,依照巴拿马Barro Colorado Island(BCI)50 hm2热带雨林样地的技术规范,于2012年在吉林长白山自然保护区和辽宁东部山区阔叶红松林残留片段分别建立了3个固定样地,对6个样地内胸径≥1 cm的木本植物进行定位调查.结果表明:6个样地共记录到木本植物69种,隶属于24科42属,其中槭树科为6个样地物种最丰富的科,区系组成均以北温带成分为主,同时混有亚热带成分;从物种多度、平均胸径、胸高断面积和重要值看,各样地优势种明显;6个样地所有独立个体的径级结构均呈倒“J”型,但各样地不同径级个体比例有很大差异,表明6个样地群落处于不同的演替阶段.各样地中重要值位于前3位物种的径级结构可分为倒“J”型、“L”型、单峰型和偏峰型4种类型;各样地主要树种随物种、径级的变化呈现出不同的空间分布格局,同一物种在不同样地的分布格局也表现出一定的差异.
Broad-leaved Korean pine forest is the belt-shaped vegetation in eastern mountainous area of Northeast China and Changbai Mountain is the core distribution area of broad-leaved Korean pine forest. Due to the disturbance of human activities, the natural broad-leaved Korean pine forest only has some areas in Changbai Mountain and Xiaoxing’an Mountains In order to comparatively analyze the similarities and differences of broad-leaved Korean pine forest in different distribution areas, the broad-leaved Korean pine forest fragments in Changbai Mountain were selected as the research object. According to the technical specifications of 50 hm2 tropical rain forest plots in Barro Colorado Island (Panama) In 2012, three fixed plots were set up in the Changbai Mountain Nature Reserve of Jilin and the remaining fragments of Korean pine forest in the eastern mountain of Liaoning, respectively, and the woody plants with the diameter of more than 1 cm were surveyed in six plots.The results showed that: A total of 69 species of woody plants were recorded, belonging to 24 genera and 42 genera. Among them, Aceraceae was the most abundant species in 6 sample plots. The fauna composition was mainly composed of the north temperate component with mixed subtropical components. From Species abundance, average breast diameter, the area of the chest height and the important value of the species showed obvious dominant species in all plots. The diameter structure of all the independent individuals in the six plots showed “J” individual The results showed that the six sample plots were in different succession stages, and the path-size structures of the top three species with important values in different plots could be divided into “J” type, “L” Type, unimodal type and partial peak type. The main tree species in different plots showed different spatial distribution patterns with different species and diameter classes. The distribution patterns of the same species in different plots also showed some differences.