摘要
在样方调查的基础上,采用方差比率法、Fisher精确检验、Jaccard指数和Spearman秩相关系数研究了山西阳城崦山自然保护区侧柏群落优势种群的种间关系。结果表明:(1)群落优势种总体呈正关联,但关联性较弱,种的分布具有相对独立性。(2)F isher精确检验与Jaccard指数结合使用可以取得较好的研究结果。(3)Jaccard指数结果表明在乔、灌、草各层中占据明显优势地位的种群其种间联结程度较大。(4)根据研究结果把侧柏群落的优势种群划分为3个生态种组:白皮松生态种组、侧柏生态种组和白莲蒿生态种组。
Based on the datasets from the field,2×2 contingency table,the interspecific relationships among 24 dominant populations of Platycladus orientalis communities in Yanshan nature Reserve in Shanxi were studied by using variance ratio（VR） test,Fisher＇s exact test,Jaccard＇s association index and Spearman rank correlation coefficient.The results indicated that the overall association of the community was not significant（p〉0.05） and tended to no correlation among all species,and it meant that the species of the community were mostly independently distributed.The combination of Fisher exact test and Jaccard＇s association index in the study obtained a better result.The results of Jaccard＇s association index showed that the association intensity of species pairs between the main dominant populations of each layer was more significant.The results also showed that the dominant populations of P.orientalis communities could be divided into three biological groups： Pinus bungeana group,P.orientalis group and Artemisia sacrorum group.
出处
《植物研究》
CAS
CSCD
北大核心
2010年第6期731-736,共6页
Bulletin of Botanical Research
基金
山西省自然科学基金(2006011077)
山西省留学基金(20060024)
关键词
侧柏群落
优势种群
种间关系
崦山自然保护区
Platycladus orientalis communities； dominant populations； interspecific relationships； Yanshan nature reserve；
