Species diversity of Pinus tabulaeformis natural secondary forest in Qinling Mountains
[Objective] This study focused on Pinus tabulaeformis species diversity of natural secondary forest in Qinling Mountains to provide basis for integrated management,biodiversity conservation and ecosystem function optimization.[Method] Using quadrat survey method,typical P.tabulaeformis community types at same development stages in Taibai Mountains and Zhouzhi Natural Reserve were selected based on multiple environmental factors (altitude,slope,etc.).A total of 20 plots with size of 20 m× 30 m were established and numbers of species in shrub layer,herb layer and arbor layer were collected to analyze the characteristic values,diversity and environmental impacts at all levels of secondary forest community in Qinling Mountains.[Result] The species richness was in the order of shrub layer＞herb layer＞arbor layer.Shrub layer had high species diversity,and the arbor layer had dominant species significantly.The important value of dominant species of P.tabulaeformis in arbor layer was high,while the dominant species in shrub layer and herb layer were low.The species richness index,Simpson index,Shannon-wiener index and evenness index trends were consistent with the increase of altitude,all increased firstly and followed by decrease in normal distribution.Sunny slope had larger indexes expect for evenness index.Slope had greater impact on shrub than on herb.[Conclusion] P.tabulaeformis natural secondary forest in Qinling Mountains had rich species,high diversity,and both slope and altitude affected species diversity.
NETL
NSTL
万方数据
维普
