Interspecific association and community stability analysis of dominant trees and shrubs in the companion community of Camellia flavida Hung T. Chang
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摘要:
为阐明原生境条件下淡黄金花茶（Camellia flavida Hung T. Chang）伴生群落的物种联结关系及其对群落稳定性的影响，基于弄岗保护区的10个600 m2样方间隔10年（2011-2021年）的每木调查数据，采用方差比率法（VR）、
χ2 检验、Spearman秩相关检验和M.Godron稳定性等方法，分析淡黄金花茶与群落不同层次优势物种的种间联结性及群落稳定性的动态变化。结果显示：（1）乔木层优势物种间的总体联结性呈不显著负联结，灌木层优势物种间呈显著正联结，随着时间的变化，乔木层的总体联结性趋于正联结，灌木层的正联结程度有所增加；（2）χ2 检验与Spearman秩相关检验结果均表明群落大多数种对间呈不显著联结关系，种间联结较为松散，相关性较弱。其中，淡黄金花茶与乔木层的苹果榕（Ficus oligodon Miq.）、灌木层的广西澄广花（Orophea polycarpa A. Candolle）等优势种表现出显著正相关，但与乔木层的对叶榕（Ficus hispida L. f.）、灌木层的日本五月茶（Antidesma japonicum Siebold & Zucc.）等优势种呈显著负相关；（3）淡黄金花茶伴生群落稳定性较高，并且群落特征及稳定性对淡黄金花茶种群的保育起到了积极的作用。研究结果说明，淡黄金花茶伴生群落的部分优势乔灌木对淡黄金花茶的分布有重要影响，10年间伴生群落整体较稳定，淡黄金花茶数量有所增长，应继续加强原生境的保护和群落长期动态监测。Abstract:To investigate species associations within the Camellia flavida Hung T. Chang associated community under natural conditions and their impact on community stability, survey data collected from 10 quadrats (600 m2) in Nonggang Nature Reserve over 10 years (2011–2021) were analyzed. Variance ratio (VR), Chi-square (
χ2 ) test, Spearman rank correlation, and M. Godron stability analysis were employed to assess the interspecific correlation and community structure stability of C. flavida and its accompanying species at different levels. Results indicated that: (1) Dominant species in the tree layer did not exhibit negative associations, while those in the shrub layer displayed significantly positive associations. Over time, the overall interspecific associations of the tree layer shifted towards positive associations, and the positive interactions in the shrub layer notably increased. (2) Theχ2 and Spearman rank correlation tests indicated that most species pairs in the community were not significantly correlated, reflecting weak associations among various species pairs. However, C. flavida exhibited significantly positive correlations with dominant species, such as Ficus oligodon Miq. in the tree layer and Orophea polycarpa A. Candolle in the shrub layer, and significantly negative correlations with F. hispida L. f. in the tree layer and Antidesma japonicum Siebold & Zucc in the shrub layer. (3) The community associated with C. flavida demonstrated high stability, with the characteristics and stability of the community positively contributing to the conservation of C. flavida. In conclusion, specific dominant trees and shrubs significantly affect the distribution of C. flavida within its community, which has maintained relative stability over the last decade, facilitating the growth of the C. flavida population. Ongoing protection of its natural habitats and sustained long-term community monitoring are recommended. -
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图 1 淡黄金花茶伴生群落不同年份乔木层优势种
χ2 检验半矩阵图★：极显著正联结；▲：显著正联结；＋：不显著正联结；☆：极显著负联结；△：显著负联结；－：不显著负联结；○：无联结。下同。
Figure 1. Semi-matrix diagram of
χ2 test results of interspecific associations among dominant tree layer species in Camellia flavida-associated community across different years★: Extremely significant positive association; ▲: Significant positive association; ＋: No significant positive association; ☆: Extremely significant negative association; △: Significant negative association; －: No significant negative association; ○: No association. Same below.
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图 2 淡黄金花茶伴生群落不同年份灌木层优势种
χ2 检验半矩阵图Figure 2. Semi-matrix diagram of
χ2 test results for interspecific associations among dominant shrub layer species in Camellia flavida-associated community across different years![]()
图 3 淡黄金花茶伴生群落不同年份乔木层优势种Spearman秩相关检验半矩阵图
Figure 3. Semi-matrix diagram of Spearman rank correlation coefficients among dominant tree layer species in Camellia flavida-associated community across different years
*: P<0.05; **: P<0.01; ***: P<0.001. Same below.
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图 4 淡黄金花茶伴生群落不同年份灌木层优势种Spearman秩相关检验半矩阵图
Figure 4. Semi-matrix diagram of Spearman rank correlation coefficients among dominant shrub layer species in Camellia flavida-associated community across different years
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图 5 淡黄金花茶伴生群落乔木层、灌木层不同年份稳定性
Figure 5. Stability of tree and shrub layer in Camellia flavida-associated community across different years
表 1 淡黄金花茶伴生群落不同年份乔木层、灌木层优势种及其重要值
Table 1 Dominant species and their importance values in tree and shrub layers of Camellia flavida-associated community across different years
优势物种
Dominant species缩写
Abbreviation重要值
Importance value / %2011 2021 乔木层 苹婆Sterculia monosperma Vent Sm 17.89 17.17 中国无忧花Saraca dives Pierre Sd 10.73 11.58 广西牡荆Vitex kwangsiensis C. Pei Vk 7.85 7.55 广西棋子豆Archidendron guangxiensis T. L. Wu Ag 7.22 7.75 对叶榕Ficus hispida L. f. Fh 4.67 6.68 假肥牛树Cleistanthus petelotii Merr. ex Croizat Cp 4.63 5.32 劲直刺桐Erythrina stricta Roxb Es 3.63 2.93 苹果榕Ficus oligodon Miq Fo 3.32 3.21 肥牛树Cephalomappa sinensis （Chun & F. C. How） Kosterm Cs 3.19 2.59 日本五月茶Antidesma japonicum Siebold & Zucc Aj 3.14 3.46 海南大风子Hydnocarpus hainanensis （Merr.） Sleumer Hh 2.82 3.27 淡黄金花茶 Camellia flavida Hung T. Chang Cf 0.31 1.32 灌木层 对叶榕Ficus hispida L. f. Fh 10.28 8.21 日本五月茶Antidesma japonicum Siebold & Zucc Aj 9.35 11.08 假肥牛树Cleistanthus petelotii Merr. ex Croizat Cp 6.66 7.14 南方紫金牛Ardisia thyrsiflora D. Don At 5.78 6.98 苹婆Sterculia monosperma Vent Sm 5.23 3.71 山桂花Bennettiodendron leprosipes （Clos） Merr Bl 5.14 6.99 淡黄金花茶 Camellia flavida Hung T. Chang Cf 4.35 6.17 广西棋子豆 Archidendron guangxiensis T. L. Wu Ag 3.85 5.08 广西澄广花Orophea polycarpa A. Candolle Op 3.83 3.27 垂茉莉Clerodendrum wallichii Merr Cw 3.70 4.21 海南大风子Hydnocarpus hainanensis （Merr.） Sleumer Hh 3.57 4.72 金丝李Garcinia paucinervis Chun ex F. C. How Gp 2.55 2.89 茎花山柚Champereia manillana var. longistaminea （W. Z. Li） H. S. Kiu Cm 2.31 2.14 南烛厚壳桂Cryptocarya lyoniifolia S. Lee et F. N. Wei Cl 2.30 2.19 裂果卫矛Euonymus dielsianus Loes. & Diels Ed 2.15 2.67 
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表 2 淡黄金花茶群落伴生群落乔木层和灌木层优势种不同年份总体联结性检验
Table 2 Overall interspecific associations among dominant tree and shrub layer species in Camellia flavida-associated community across different years
层次
Level年份
Year方差比率
Variance ratio （VR）统计量（W）
Statistic (W)χ2临界检验值
χ2 threshold结果
Results乔木层 2011 0.71 43.49 （43.19，79.08） 不显著负联结 2021 0.90 54.22 （43.19，79.08） 不显著负联结 灌木层 2011 1.54 92.49 （43.19，79.08） 显著正联结 2021 1.60 95.61 （43.19，79.08） 显著正联结
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表 3 淡黄金花茶伴生群落不同年份稳定性分析结果
Table 3 Camellia flavida-associated community stability across different years
年份
Year层次
Level曲线类型
Type of curve决定系数（R2）
Determination
coefficient交点坐标
Intersection coordinate2011 乔木层 y=−0.0131x2+1.977 7x+25.099 0.96 （28.80，71.20） 灌木层 y=−0.0143x2+2.122 1x+22.220 0.94 （28.68，71.32） 群落整体 y=−0.0142x2+2.110 8x+22.245 0.95 （28.77，71.23） 2021 乔木层 y=−0.0134x2+1.985 2x+27.118 0.95 （27.91，72.09） 灌木层 y=−0.0147x2+2.177 8x+20.107 0.95 （29.04，70.96） 群落整体 y=−0.0145x2+2.126 9x+23.487 0.94 （28.14，71.86）
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