江西三清山优势种群钩锥-山蜡梅群落研究

对江西省三清山钩锥-山蜡梅群落进行了调查和分析.结果表明:(1)群落共有种子植物40科56属81种;其中热带属占63.04%,温带成分占36.96%.(2)群落多样性指数D=0.85,H′=2.77,PIE=0.85,Jsw=0.68,Jsi=0.86,Ea=0.37.(3)群落优势科组成主要为壳斗科、蜡梅科、樟科,而...

Study on the dominant population Castanopsis tibetana-Chimonanthus nitens community in Mount Sanqingshan, China

According to a filed survey and analysis of plot data,the characteristics of plant community of Castanopsis tibetana-Chimonanthus nitens in Sanqing Mountain in Jingxi province,China was studied.The results showed that:(1)There are 81 species spermatophyte form 56 genera belonging to 40 families,which the tropical genera is occupted 63.04%,and the temperate genera is occupted 36.96%.(2)In the community D=0.85,H'=2.77,PIE=0.85,Jsw=0.68,Jsi=0.86,Ea=0.37.(3)The community dominant families is mainly the Fagaceae,Calycanthaceae,Lauraceae,Castanopsis tibetana and Chimonanthus nitens are absolutely dominant.(4)The analysis of the life forum show that the phanerophytes are preponderant.There also have some chamaephytes,hemicryptophytes and cryptophytes,but have not annual plants.(5)The community composes is characteried by two-dominant species.The age forum show that the six dominant populations are declining.The frequency grades is A>B>C>D