摘要
选取中条山中段植物群落的24个优势种,采用2×2列联表的χ2检验、Ochiai关联度指数、Pearson相关和Spearman秩相关分析进行种间关系研究.结果表明:1在所有种对中,呈极显著和显著相关的种对数所占比率较低,大部分种对呈负联结趋势;2χ2检验只有与Ochiai关联度指数结合,结论才比较合理;3Spearman秩相关分析灵敏度较高,优于Pearson相关分析;424个优势种可划分为5个生态种组,同一生态种组内,各种间具有较强的正联结,表明其资源利用方式和生态要求相似,而不同组间联结较为松散.槲栎、槲树、榛子、连翘等呈独立分布.
The interspecific relations of twenty four dominant species of the flora in the middle part of Zhongtiaoshan Mountain were studied by dint of 42 test with 2 × 2 contingency table,Ochiai association index,Pearson correlation and Spearman＇s rank correlation. The results revealed that （1） of all the species pairs,the pairs that present significant and extremely significant differences accounted for a low proportion and the pairs that appeared negatively correlated made up a majority; （2） the proper conclusions of this study depended upon the proper combination of X2 test with Ochiai association index; （3） in the study, Spearman＇s rank correlation analysis presented a high sensitivity and performed better than Pearson correlation analysis, （4） the twenty four species could be divided into five ecological groups and the different species in the same groups appeared strongly and negatively correlated ,which indicated that they had similar resource-utilizing ways and ecological requirements ;and but the species in different groups showed a poor correlation. Quercus aliena,Quercus dentata ,Corylus heterophylla ,and Forsythia suspensa appeared independent.
出处
《西北植物学报》
CAS
CSCD
北大核心
2005年第12期2465-2471,共7页
Acta Botanica Boreali-Occidentalia Sinica
基金
山西省软科学基金021017-1
关键词
中条山
植物群落
优势种群
种间关系
Zhongtiaoshan Mountain
flora
dominant population
interspecific relation
