关 键 字(英文)：community dynamic succession species diversity fluctuation Dinghushan
摘 要(英文)：The monsoon evergreen broad2leaved fo rest (M EBF) in D inghushan N ature Reserve (DNR) has been considered as a
zonal vegetat ion in low er subt rop ical Ch ina, w ith a h isto ry of mo re than 400 years. Its community st ructure, species diversity
and community dynam ics have been studied since 1956, so a lo t of data have been w ell accumulated, w h ich benefits the study on community succession. Based on the data from five2t ime survey in a 2000m 2 permanent p lo t of the o riginal Castanop sis ch inensis 2 C ryp tocary a
ch inensis 2S ch im a sup erba community ofM EBF in DNR, the community dynam ics of species compo sit ion and species diversity
in a tw enty2year successional p rocess, its future successional tendency and the main facto rs that influenced the community
succession w ere studied in th is paper. The results w ere show ed as fo llow s: (1) Changes of the number of individuals of
community demonst rated a“W ”shape tendency. (2)Due to insect irrup t ion, the populat ion size of C ryp tocary a concinna and
C ryp tocary a ch inensis decreased by 100% , 98121% , respect ively, w h ich led to lo se their dom inant status, and the number of
individuals of the L au raceae decreased by 95135%; Sim ilarly, the populat ion size of Castanop sis ch inensis and S ch im a sup erba decreased w ith successional p rocesses; Therefo re, o riginal community should be renamed as Castanop sis ch inensis 2 A p orosa
y unnanensis 2 S ch im a sup erba in 2002. (3) The impo rtant value of all Heliophytes in the community fluctuated from 18187 to
27173, maxim ized in 2002. ( 4 ) D ifferences in species compo sit ion among commuit ies increased w ith the community
successional t ime, but their changes w ere no obvious w ith in 20 years. (5) Species richness appeared a lit t le fluctuat ion, and
the values of SW index, evenness index and Simp son index of community fluctuated w ith in the ranges of 313904～ 315724,
016175～ 016540 and 011837～ 012477, respect ively. The maximum value of SW index occurred in 2002. The changes of SW
and evenness indices w ere sim ilar to that of the number of individuals in the community, but the change of Simp son index w as
cont rary to that of evenness index. A lthough species compo sit ion and species diversity fluctuated sligh t ly, the community st ill
maintained relat ively stable. (6) The main facto rs that influenced community succession and led to community fluctuat ion
m igh t include bo th natural disturbances ( insect irrup t ion, catast roph icw eather) and human disturbances ( tourism and research
act ivit ies). ( 7) The community w ill app roach to a climax in the future, but the op inion that the climax community of
D inghushan characterized by the dom inant species of C ryp tocary a concinna 2C ryp tocary a ch inensis needs to be further test ified.
鼎湖山季风常绿阔叶林原锥栗-厚壳桂-荷木群落演替