山西霍山森林群落物种的多样性和生态优势度

THE SPECIES DIVERSITY AND ECOLOGICAL DOMINANCE IN THE FOREST COMMUNITY OF HUOSHAN MOUNTAIN IN SHANXI

用Shannon-Weiner指数和Simpson指数计测了霍山东坡14个、西坡15个百米海拔段间的物种多样性(D)和生态优势度(C).分析结果表明:①海拔950～1750m时,随海拔增高D值增大,C值变小,1750m以上则相反.②东坡D值高于西坡,C值低于西坡,所有灌木层D值高于乔木层,C值低于乔木层.③地带性群落的D值大于非地带性群落,C值相反.实践证明.该两项反映群落组织特征和结构特点的综合定量指标及其计测方法,能够客观反映本区群落生态的实际.

With the use of Shannon-Wiener Index and Simpson Index, the species diversity and ecological dominance are measured in 14 and 15 of one- hundred- metre altitudinal belts on the eastern and western slopes of Huoshan Mountain respectively. The results show (1) that value D increases and value C decreases with the rise of the altitude from 950 m to 1 750 m while vice versa above the height of I 750 m. (2) that value D on eastern slope is higher than that on the western slop, while volue C is just contray and value D in all the scrub layer is higher than that in the forest but value C is just contrary; and (3) that value D in the zonal community is greater than that in the non-zonal community while value C is contrary. Practice proves that this method is suitable for the analysis of the aeslalisivae in the warm temparate zone.