珍稀濒危植物矮牡丹生存群落优势种种间联结性及群落稳定性
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摘要
采用方差比率法(VR)、χ~2检验、联结系数(AC)、共同出现百分率(PC)、Pearson相关系数、Spearman秩相关系数以及M.Godron稳定性测定等数量分析方法,对山西稷山矮牡丹(Paeonia suffruticosa Andr. var. spontanea)生存群落中20个优势物种、190个种对间进行种间相关性及群落稳定性分析.结果显示:(1)稷山矮牡丹生存群落20个优势种种群整体表现为不显著负相关性,物种间相对独立,群落稳定性结果(40/60)远离20/80,整体群落不稳定.(2)χ~2检验中不显著关联的对数有168对,占到了88.78%;AC和PC结果都表明20个优势种群落有很大的独立性或随机性,对生境的需求不同,共同出现概率较低;χ~2检验结果、Pearson相关系数半矩阵图、Spearman秩相关系数半矩阵图分别表明检验呈正关联的种对占总对数的38.42%、38.42%、44.74%;检验呈负关联的种对分别占总对数的61.05%、61.05%,54.74%;其中黄刺玫(Rosa xanthina)、连翘(Forsythia suspensa)、辽东栎(Quercus wutaishanica Mayr)与矮牡丹的正相关性相对较显著;黄精(Polygonatum sibiricum)、红柄白鹃梅(Exochorda giraldii)、西北栒子(Cotoneaster zabelii)和黄栌(Cotinus coggygria)与矮牡丹的负相关性相对较显著;(3)根据种群的聚类分析和种间联结测定分析,把矮牡丹生存群落的20个优势种划分为3个生态种组.以上研究表明该群落中种对间的关联性较弱,群落处于不稳定演替阶段,在对矮牡丹保护的同时应加强与其正相关性较强物种在其群落中的保护和建立,促进其群落趋于稳定,以求达到对其实效保护的目的.(图5表6参31)
To explore the interspecific association and community stability among the 20 dominant species, 190 species pair of Paeonia suffruticosa Andr. var. spontanea communities were studied by using quantitative analysis methods including the variance ratio(VR), Chi-square test, association coefficient(AC), percentage co-occurrence(PC), Pearson correlation coefficient, Spearman rank correlation coefficient, and M.Godron stability analysis. Results showed that:(1) No significantly negative correlation was observed in the 20 dominant species of P. suffruticosa Andr. var. spontanea communities as a whole,which suggested that the species were relatively independent. The result for the community stability(40/60) was distinct to the value of 20/80, indicating that the whole community was unstable.(2) The Chi-square test demonstrated a non-significant association in the 168 species pair, accounting for 88.78%. The ratio of species pair with a positive correlation determined by the Chi-square test, Pearson correlation coefficient semi-matrix, and Spearman rank correlation coefficient semi-matrix was 38.42%, 38.42%, and 44.74%, respectively. The proportion of species pair with negative correlation investigated by the same methods mentioned above was 61.05%, 61.05%, and 54.74%, respectively. A relatively significant positive correlation was noted between Rosa xanthina, Forsythia suspensa or Quercus wutaishanica Mayr, and P. suffruticosa Andr. var. spontanea; and a relatively distinct negative correlation was exhibited between Polygonatum sibiricum, Exochorda giraldii, Cotoneaster zabelii or Cotinus coggygria, and P. suffruticosa Andr. var. Spontanea. The results of both AC and PC revealed that there was a considerable independence or randomness in the 20 dominant species communities, which meant that the percentage of co-occurrence was lower due to the different habitat requirements.(3) The 20 dominant species of Paeonia suffruticosa Andr. var. spontanea communities were assigned to three ecological species groups, depending on the results of cluster analysis and interspecific association. Based on the analyses mentioned above, we found that the correlation among the species pair for this community was relatively weak, indicating that the community was in an unstable succession stage. The protection of the dwarf peony should be intensified while the protection and establishment of the species with a strong positive correlation in the community should be enhanced. The community should be stabilized in order to achieve effective protection.
To explore the interspecific association and community stability among the 20 dominant species, 190 species pair of Paeonia suffruticosa Andr. var. spontanea communities were studied by using quantitative analysis methods including the variance ratio(VR), Chi-square test, association coefficient(AC), percentage co-occurrence(PC), Pearson correlation coefficient, Spearman rank correlation coefficient, and M.Godron stability analysis. Results showed that:(1) No significantly negative correlation was observed in the 20 dominant species of P. suffruticosa Andr. var. spontanea communities as a whole,which suggested that the species were relatively independent. The result for the community stability(40/60) was distinct to the value of 20/80, indicating that the whole community was unstable.(2) The Chi-square test demonstrated a non-significant association in the 168 species pair, accounting for 88.78%. The ratio of species pair with a positive correlation determined by the Chi-square test, Pearson correlation coefficient semi-matrix, and Spearman rank correlation coefficient semi-matrix was 38.42%, 38.42%, and 44.74%, respectively. The proportion of species pair with negative correlation investigated by the same methods mentioned above was 61.05%, 61.05%, and 54.74%, respectively. A relatively significant positive correlation was noted between Rosa xanthina, Forsythia suspensa or Quercus wutaishanica Mayr, and P. suffruticosa Andr. var. spontanea; and a relatively distinct negative correlation was exhibited between Polygonatum sibiricum, Exochorda giraldii, Cotoneaster zabelii or Cotinus coggygria, and P. suffruticosa Andr. var. Spontanea. The results of both AC and PC revealed that there was a considerable independence or randomness in the 20 dominant species communities, which meant that the percentage of co-occurrence was lower due to the different habitat requirements.(3) The 20 dominant species of Paeonia suffruticosa Andr. var. spontanea communities were assigned to three ecological species groups, depending on the results of cluster analysis and interspecific association. Based on the analyses mentioned above, we found that the correlation among the species pair for this community was relatively weak, indicating that the community was in an unstable succession stage. The protection of the dwarf peony should be intensified while the protection and establishment of the species with a strong positive correlation in the community should be enhanced. The community should be stabilized in order to achieve effective protection.
引文
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9姚连芳,赵一鹏.矮牡丹濒危机制分析与保护对策[J].中国农学通报,2005,21(5):156-158[Yao LF,Zhap YP.Endangered mechanism and conservative strategies of dwarf peony[J].Chin Agric Sci Bull,2005,21(5):156-158]
10王琳,张金屯.濒危植物矮牡丹的生态位研究[J].生态学杂志,2001,20(4):65-69[Wang L,Zhang JT.The niche characteristics of endangered plant Paeonia suffruticosa var.spontanea[J].Chin J Ecol,2001,20(4):65-69]
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12邹喻苹,蔡美琳,张志宪,裴颜龙.矮牡丹的遗传多样性与保护对策[J].自然科学进展,1999,9(5):86-90[Zou YP,Cai ML,Zhang ZX,Pei YL.Genetic diversity and conservation strategies of peony[J].Prog Nat Sci,1999,9(5):86-90]
13洪德元,周世良,何兴金,袁军辉,张延龙,成仿云,曾秀丽,王雁,张秀新.野生牡丹的生存状况和保护[J].生物多样性,2017,25(7):781-793[Hong DY,Zhou SL,He XJ,Yuan JH,Zhang YL,Cheng FY,Zeng XL,Wang Y,Zhang XX.Current status of wild tree peony species with special reference to conservation[J].Biodiv Sci,2017,25(7):781-793]
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