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本研究采取空间代替时间的方法,在广西南宁老虎岭以10、18、22、28和50 a的马尾松(Pinus massoniana)林为研究对象,对演替进程中群落结构、更新潜力、物种多样性、Godron指数等进行调查,探明马尾松林演替过程中群落动态及稳定性变化。结果表明:(1)随演替进程,常绿树种增多,落叶树种减少,群落的更新潜力呈先升后降的变化规律,马尾松的径级结构呈单峰型,由于缺乏更新幼苗,呈现衰退趋势,椆木(Lithocarpus glaber)的径级结构为L型或逆J型,更新充足。(2)随演替进程,物种丰富度呈下降趋势,Simpson指数和Shannon指数整体呈先升后降的趋势,Gordon指数随演替进程逐渐升高,其与多样性指数呈非简单的线性关系,物种多样性水平不能完全代表群落稳定状况。
In this study, Pinus massoniana forests at Lavena, Nanning, Guangxi at 10, 18, 22, 28 and 50 years were selected as the research objects to study the community structure, renewal potential, species diversity Sex, Godron index, etc. to investigate the community dynamics and stability changes during the succession of Pinus massoniana forest. The results showed that: (1) With the succession process, the evergreen species increased, the species of deciduous trees decreased, and the renewal potential of the community showed the trend of first rising and then decreasing. The diameter structure of masson pine was single peak type, Decline trend, alder (Lithocarpus glaber) diameter structure is L type or inverse J type, updated enough. (2) With the succession process, species richness decreased, Simpson index and Shannon index increased first and then decreased, and Gordon index increased gradually with the succession process, which showed a non-linear relationship with diversity index , The level of species diversity can not completely represent the stability of the community.