The gray relevancy analysis of plant community diversity exponent in Danxia Mountain of Langshan

The Simpson exponent and Sheldon exponent of different plant community species in Langshan Mountain were researched using gray relevancy analysis method.The results were showed as follows: ① In the same growth model,the change of the Simpson exponent and Sheldon exponent were not obviously in pattern.② In Danxia geomorphic zone,the danxia mountain consisted of isolate island territory because of the ecological isolation.The diversification disciplinarian of relating degree and relating coefficient of community were disaccord.③ The gray relevancy analysis was an efficient method of analyzing diversity of plant community when the samples were less.