| 周 泉，叶 茂.不同地形条件对落叶松云杉混交林建群种共存机制的影响[J].广东农业科学,2020,47(2):45-53 |
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不同地形条件对落叶松云杉混交林建群种共存机制的影响 |
| Influence of Different Topographic Conditions on theConstructive Species Coexistence Mechanismof Mixed Forest of Larch and Spruce |
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| DOI：10.16768/j.issn.1004-874X.2020.02.007 |
| 中文关键词: 地形条件 生态位 物种共存 富蕴地区 生境异质性 |
| 英文关键词: topographic conditions niche species coexistence Fuyun area habitat heterogeneity |
| 基金项目:国家科技基础性工作专项（2015FY110500-16） |
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| 摘要点击次数: 2442 |
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| 中文摘要: |
| 【目的】探索有限资源环境下的物种共存机制一直是群落生态学的核心问题。【方法】以富蕴地
区山地林区西伯利亚落叶松 - 西伯利亚云杉混交林为研究对象，基于混交林的群落学特征，运用对比分析方法
探讨环境因子（海拔、坡度、坡向、坡位）对群落物种分布及建群种形态特征的影响，以期解释研究区松杉混
交林建群种共存的现象。【结果】西伯利亚落叶松和西伯利亚云杉的生态位宽度均高于其他伴生种，但西伯利
亚落叶松和西伯利亚云杉的径级结构均表现出老龄化趋势。Godron 坐标计算结果也表明，群落稳定性坐标为（39，
61），与理想稳定点坐标（20，80）相比向下移动了 26.87 欧氏距离，说明混交林群落稳定性相对不高。建群种
的地形条件（海拔、坡位、坡度和坡向）是两种建群树种 4 相形态特征（胸径、树高、冠幅面积、株数）的重
要影响因素。【结论】富蕴山地海拔、坡度、坡位、坡向等生境异质性影响了西伯利亚落叶松和西伯利亚云杉
的生态位，且利于维持混交林群落中此两种建群树种的长期共存。 |
| 英文摘要: |
| 【Objective】Exploration on the mechanisms of species coexistence in the environment with limited
resources has always been the core problem of community ecology.【Methods】A study was conducted on the mixed forest
of Siberian larch-Siberian spruce in the mountainous forest area of Fuyun area. Based on the characteristics of coenology
of mixed forest, the influence of the environmental factors (altitude, slope, aspect and slope position) on the distribution of
community species and the morphological characteristics of the constructive species were studied by comparison analysis
method, in order to explain the constructive species coexistence of the mixed forest of larch and spruce in the study area.
【Result】The results showed that the niche widths of Siberian larch and Siberian spruce were higher than those of other
accompanying species; however, both of the diameter structures of Siberian larch and Siberian spruce showed aging trends.
Godron coordinate calculation results also showed that the community stability coordinate was (39, 61), which was 26.87
Euclidean distance downward compared with the ideal stability point coordinate (20, 80), indicating that the stability of
the mixed forest community was relatively low. The topographic conditions (elevation, slope position, slope, and aspect) ofconstructive species were the important factors affecting the four-phase morphological characteristics (DBH, tree height, canopy
area, and number of plants) of the two constructing tree species.【Conclusion】The habitat heterogeneity such as elevation,
slope, slope position and aspect of Fuyun mountainous area affects the niche of Siberian larch and Siberian spruce, and
maintains the long-term coexistence of these two species in mixed forest community. |
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