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研究武夷山中亚热带甜槠常绿阔叶林9600和400m2样地物种多样性和生物量的动态关系。结果表明:随着演替进展,9600m2样地生物量增加,物种丰富度在群落总体、乔木层和下木层均表现为下降趋势,个体数量在群落总体表现为下降趋势,在乔木层表现为先增加后下降的趋势,在下木层表现为先下降后增加的趋势,Shannon-Wiener指数在群落总体和乔木层均表现为下降趋势,在下木层表现为先下降后增加的趋势,均匀度指数在群落总体、乔木层和下木层均表现为先下降后增加的趋势;400m2样地物种多样性各指标在不同层次不同时间进程中表现出明显的异质性,2001—2004年,随着活立木生物量的增加,下木层Shannon-Wiener指数和物种丰富度明显下降,2004—2007年,乔木层Shannon-Wiener指数和物种丰富度明显下降,物种多样性各指标与活立木生物量间均不存在显著相关性(P>0.05)。物种多样性对生态系统功能的影响在不同的时空尺度中差异明显。
The dynamic relationship between species diversity and biomass of 9600 and 400 m2 plots in Wuyishan subtropical sweety-leaved evergreen broad-leaved forest was studied. The results showed that the biomass of 9600m2 plots increased with the succession of succession, and the species richness decreased in the community as a whole, in the arbor layer and in the understory layer. The population quantity showed a downward trend in the community, The first trend of increasing and then decreasing in the next layer showed the first decrease and then increase, the Shannon-Wiener index showed a downward trend in the community and in the arbor layer, the first decline and then the increase in the next layer, the evenness index In the community as a whole, both the arbor layer and the subalpine layer showed the tendency of first decreasing and then increasing. The indexes of species diversity in the 400m 2 plots showed obvious heterogeneity in the process of different stages and different times. From 2001 to 2004, The Shannon-Wiener index and species richness of understorey decreased obviously with the increase of living biomass, and the Shannon-Wiener index and species richness of arbor declines obviously from 2004 to 2007. The indexes of species diversity and living wood biomass There was no significant correlation (P> 0.05). The effects of species diversity on ecosystem function vary greatly in different time and space scales.