Structural characteristics of different grassland community type

Abstract: The spatial distribution characteristics, composition and plant diversity of three typical grassland communities was quantified by applying betabinomial mode in the Shenmu City, Shaanxi Province. This study showed that the composition of Artemisia annua grassland, Leymus chinensis grassland and Thymus mongolicus grassland could be well simulated by the beta binomial distribution model via the chisquare test. The total umber of grassland community was A. annua grasslandL. chinensis grasslandT. mongolicus grassland, and the diversity index was L. chinensis grasslandA. annua grasslandT. mongolicus grassland, and the evenness index was L. chinensis grasslandT. mongolicus grasslandA. annua grassland. However, the average number of species and diversity index in plot with the size of 0.25 m2 followed the pattern with L. chinensis grasslandT. mongolicus grasslandA. annua grassland and L. chinensis grasslandT. mongolicus steppeA. annua steppe, respectively. The spatial heterogeneity index of the whole community was A. annua grasslandL. chinensis grasslandT. mongolicus grassland and the average biomass was T. mongolicus grasslandA. annua grasslandL. chinensis grassland.