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当前位置: 首页 > 文章 > 凤凰县刺楸天然种群主要物种的生态位特征 湖南农业大学学报(自然科学版) 2020 (3) 310-318
Position: Home > Articles > Niche characteristics of main plant species in Kalopanax septemlobus natural population in Fenghuang county Journal of Hunan Agricultural University(Natural Sciences) 2020 (3) 310-318

凤凰县刺楸天然种群主要物种的生态位特征

作  者：
姚旺;袁志忠;龙华;杨哲;李鹂
单  位：
关键词：
刺楸;天然种群;生态位;资源利用;凤凰县
摘  要：
以湖南省凤凰县刺楸(Kalopanax septemlobus)天然种群分布相对集中的9个样地作为资源位,按重要值总和排序确定主要植物种,应用Levins、Shannon–Wiener、Pianka和Schoener公式分析群落乔木层和灌木层总计29个主要植物种的生态位。结果表明:在乔木层中,刺楸的重要值总和最高(1.345),杉木、柞木、刺楸的生态位宽度较大;乔木层多数种对间的生态位重叠程度较高,对环境需求存在较高的相似性,高重叠种对的相似度为69.23%,高相似种对的相似度为52.75%;刺楸和其他物种的生态位重叠与其他物种的生态位宽度呈正相关;灌木层种间生态位分化不明显,在资源不足时极易产生竞争;生态位宽度值与生态位重叠值、生态位相似比例值关系复杂;刺楸生态位宽度较宽,当资源不足时,刺楸在竞争中不占优势,其种群更新会受到其他物种的影响。
译  名：
Niche characteristics of main plant species in Kalopanax septemlobus natural population in Fenghuang county
作  者：
YAO Wang;YUAN Zhizhong;LONG Hua;YANG Zhe;LI Li;College of Biology and Environmental Science, Jishou University;
关键词：
Kalopanax septemlobus;;natural population;;niche;;resource utilization;;Fenghuang county
摘  要：
Nine natural Kalopanax septemlobus population plots were selected in this study in Fenghuang county, Hunan province. This study analyzed the niche characteristics of 29 plant species in tree layer and shrub layer by adopting Levins, Shannon-Wiener, Pianka and Schoener methods. K. septemlobus showed the highest total of importance value of 1.345 in the tree layer. The niche widths of Cunninghamia lanceolata, Xylosma racemosum and K. septemlobus were higher than other species in the tree layer. The niche overlapping among tree species was relatively high and the environment requirement of was similar(69.23% and 52.75% of the tree pairs showed high niche overlapping and high niche similarity). The niche overlap between K. septemlobus and other species showed positive correlation with the niche breadth of other species. The niche differentiation of shrub layer is not significant, suggesting hot competition between them when the resource is insufficient. The relationship among the niche value width, niche overlap value, and niche similarity value is complicated. K. septemlobus showed high niche breadth. It would lose its competitive advantage under condition with limited resouce, which may impair the population regeneration.

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