五台山蓝花棘豆群落优势种群的种间关系分析

Interspecific association and correlation of dominant species in Oxytropis coerulea community in Wutai Mountains

应用2×2列联表的χ2检验和Spearman秩相关系数研究了五台山蓝花棘豆群落(Oxytropiscoeruleacommunity)的种间关系,分别测定了18种植物,共153个种对的种间关联(或相关)。结果表明,χ2检验仅有6个种对为显著或极显著正(或负)关联,而相关系数表明有10个种对呈显著正相关,8个种对呈显著负相关。整体来看,大多数种群之间关系松散。种群之间正关联或正相关主要是由于它们具有相近的生物学特性,对生境的需求相似;而种对间的负关联和负相关,则主要是由于它们具有不同的生物学特性,对生境具有不同的生态适应性或相互竞争所致。

By using χ~2-test for 2×2 contingency table and Spearman's rank correlation coefficient,We studied the interspecific relationships of dominant species in Oxytropis coerulea community in Wutai Mountains.A total of 18 plant species and 153 species-pairs interspecific association were investigated.The results indicated that only 6 species-pairs showed significant or highly significant association in χ~2-test,while 18 species-pairs had significant or highly significant correlation in Spearman's rank test.Theref...