| 缙云山常绿阔叶林次生演替优势种群动态 |
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| 引用本文： | 刘玉成,缪世利.缙云山常绿阔叶林次生演替优势种群动态[J].植物生态学报,1992,16(1):26-35. |
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| 作者姓名： | 刘玉成 缪世利 |
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| 作者单位： | 西南师范大学生物系，西南师范大学生物系 重庆 630715，重庆 630715 |
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| 摘 要： | 本文用林木大小级分析了缙云山常绿阔叶林次生演替系列群落优势乔木种群密度动态。通过方差分析，用均方—区组图探讨优势种群分布格局动态，研究了种群增长、分布格局与群落演替的关系。通过对演替期间优势种群大小级密度、结构、存活曲线的分析，估计优势种群在演替系列群落中出现的顺序，从而分为演替森林先锋种、顶极先锋种和顶极种。大小级结构分析结果表明，白茅群丛只有Ⅰ、Ⅱ级苗木；马尾松林除V级大树外，为一倒金字塔形；针阔混交林与银木荷林具完整等级的典型金字塔形，栲树林的金字塔不规则。种群分布格局随演替进程而变化，但主要表现为集群分布。以K值判断，顶极群落优势种群集聚度低于混交林。演替期间，种群个体格局规模增大。环境格局变化相应于分布格局而变化，如马尾松种群，规模增加强度下降，如银木荷，或规模强度都增加，如白毛新木姜子。
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| 关 键 词： | 缙云山 常绿阔叶林 次生演替 种群 |
THE STUDY ON SECONDARY SUCCESSION OF EVERGREEN BROADLEAVED FORESTS ON JINYUN MOUNTAIN.THE DYNAMICS OF COMMUNITIES AND DOMINANT POPULATIONS |
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| Liu Yu-cheng Miao Shi-li.THE STUDY ON SECONDARY SUCCESSION OF EVERGREEN BROADLEAVED FORESTS ON JINYUN MOUNTAIN.THE DYNAMICS OF COMMUNITIES AND DOMINANT POPULATIONS[J].Acta Phytoecologica Sinica,1992,16(1):26-35. |
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| Authors: | Liu Yu-cheng Miao Shi-li |
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| Abstract: | The density and pattern dynamics of communities and dominant populations for secondary successional seral communities of evergreen broadleaved forests on Jinyun Mountain are studied on the basis of the size class and mean squreblock size graphs using variance analysis ,comparison with the size-structure, size-survivorship during succession. The sequence of dominant populations occur during succession. The dominant species might be divided into three types: pinoeer succession species, pinoeer climax, species, climax species. All of them progressively develop a whole set of size class. It is shown that the size-structure of Imperata association and Masson pine forest are similar to those of single Masson pine population. The structure of the former has only Ⅰ and Ⅱ classes, and that the latter looks like a inverted pyramid except for class Ⅴ. Both mixed needle and broadleaved forest and Schima forest have a typical pyramid with whole size classes. However, they are essentially different in contents. And the pyramid of Castanopsis is somewhat irregular.The size-survivorship curves of communities are vary from an inverted J-shape in Masson pine forest at the initial period to more or less a straightline later. The patterns of population mainly show continous distribution, although they vary with succession. Most of them coorrespond to the pattern of seedlings (I and II class), while the tree classes show largely randomness distribution. It is illustrated that in the course of succession the scale of the smallest pattern increases controlled by the characteristics of plants, wheresa the environmental pattern changes in the following aspects: 1. due to the variation in the type of pattern, the scale and pattern raise and fall corresponding to the growth, mature, and decline of populations; 2. even if the type of pattern does not change, but (a) the scale increases and the intensity descreases (e. g. Schima); (b) both scale and intensity increases (e. g. Neloitsea). The scale and intensity of pattern of soil depth and moisture for seral communities do not parallel with each other. The distribution of higher classes of some populations is related to the depth of soils. |
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| Keywords: | Jinyun mountain Evergreen broadleaved forest Secondary succession Population |
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