特金罕山自然保护区草地植物多样性与海拔梯度变化

A Research on the Diversity and Altitudinal Variation of Grassland Plants in Tejinhan Mountains Nature Reserve

应用Simpson指数、Shannon-Wiener指数和Pielou指数对内蒙古特金罕山自然保护区草地植物多样性及海拔梯度变化进行研究,结果表明:(1)特金罕山草地共有植物212种,其中草本植物194种,木本植物18种;隶属43科151属,菊科植物最多,49种,其次是禾本科植物,23种,两者占总种数的33.96%。(2)草地主要植物物种受海拔高度影响较大,各海拔梯度的植物种类和优势种存在差异。(3)特金罕山草地植物多样性丰富,各海拔梯度的植物种数呈先增加后降低趋势,种数最多的是海拔1000~1050m区域,共有植物90种;Simpson指数、Shannon-Wiener指数和Pielou指数随海拔梯度升高均呈现先升高后降低趋势。

A research was conducted on the diversity and altitudinal gradient change of the grassland plants of Tejinhan Mountain Nature Reserve in Inner Mongolia Autonomous Region by applying Simpson index,Shannon-Wiener index and Pielou index.The results revealed that there were a total of 212 species of plants on the grassland of Tejinhan mountains,which fell into 43 families and 151 genera,including 194 species of herbaceous plants and 18 species of ligneous plants.The number of feverfew species was the biggest,which was 49,followed by gramineous plants,which had 23 species;these two species accounted for33.96% of the total.The major grassland plant species were remarkably affected by the altitude,and the plant species and dominant species at different altitudes varied from each other.The Tejinhan mountains had rich grassland plant diversity,the number of plant species increased first along with the altitude increase,and then decreased,and the region with the biggest number of species was at the altitude of 1000~1050 m,where there were a total of 90 plant species.The Simpson index,Shannon-Wiener index and Pielou index all displayed a general tendency of rising first and then falling with the increase of altitude.