Interspecific relationships among dominant species in the planted vegetation communities in sandy hill regions of northwestern Shanxi,China

作者 Han Jintao; Li Suqing; Zhao Dehuai; Liber Karsten

期刊 Journal of Arid Land Resources and Environment , 2016,12:30

摘要 The interspecific relationships among 120 species - pairs from 16 dominant species in planted vegetation communities in sandy hill regions of northwestern Shanxi province,China,were analyzed using techniques of chi~2 - test,Pearson''s correlation coefficient,Spearman''s rank correlation coefficient and cluster analysis. Results included: 1) chi~2 - test,Pearson''s correlation coefficient and Spearman''s rank correlation coefficient analyzed had the similar results,which indicated that the number of negative correlation dominant species - pairs were significantly higher than the positive correlation dominant species - pairs within the planted vegetation communities. 2) The ratio of positive and negative association was less than 1,which indicated that most planted vegetation communities in the study regions were relatively fragile. Therefore,the scientific management strategy should be strengthened in these planted vegetation communities. 3) The species - pairs with similar biological features,similar ecological adaptability to the habitat,or with higher degree of niche overlap tended to be positively correlated,while those with different biological features,different adaptability to habitat,or existing inter - competition tended to be negatively correlated. The species - pairs of Populus simonii and Pinus tabulaeformis in the tree layer,Salix cheilophila and Caragana korshinskii in the shrub layer,and Agropyron desertorum and Elymus dahuricus,in the herb layer had significantly different negative correlations,and thus should not be planted in such pairs in actual revegetation practice; the species - combinations of Populus simonii,Hippophae rhamnoides and Agropyron desertorum,Pinus tabulaeformis and Lespedeza davurica,Populus alba,Caragana korshinskii and Roegneria Kamoji from the three different layers showed a significantly different positive correlation and thus could be planted in such combinations in actual revegetation practice. 4) The 16 dominant species were divided into four ecological species groups by cluster analysis based on Spearman''s rank correlation coefficient and their ecological habit and distribution.

涉及物种 乌柳 Salix cheilophila 银白杨 Populus alba 小叶杨 Populus simonii 中国沙棘（亚种） Hippophae rhamnoides 油松 Pinus tabulaeformis