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- W2365207941 abstract "The Xiaolong Mountain,which is the western section of the Qinling mountains,is one of the main distribution area of Pinus bungeana,and also the western confine of the distribution of natural bungeana forests.In order to determine the regional status and developing trend of Pinus bungeana and to strengthen the demand of protecting and utilizing,on the basis of numerous surveys taken in the field of bungeana contiguous distribution area,the survey samples were carried out thoroughly.In this research both biological diversity index and dominance index were calculated,meanwhile the characteristics of species diversity of P.bungeana community were analyzed as well.The results showed: ⑴diversity index of the tree layer is 0.3486 and the uniformity is 0.4199 in sample area.Through the comparison between herbs layer,shrub layer and the tree layer: for the diversity index,the shrub layer is greater than the herb layer while is larger than the tree layer,for the uniformity index,the herbs layer is larger than the shrub layer while is larger than the tree layer;Within the region,the diversity index is increasing with the increasing elevation,but the dominance index changes cerversely.⑷Diversity index shows a downward trend with the increasing of stand age,advantages degree changes in the opposite.The survey provided the basic data for the delimitation in the P.bungeana protected areas of XiaoLong Mountain and regional environmental management." @default.
- W2365207941 created "2016-06-24" @default.
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- W2365207941 date "2010-01-01" @default.
- W2365207941 modified "2023-09-24" @default.
- W2365207941 title "The analysis of species diversity characteristics about the rare and endangered Pinus bungeana in the Xiaolong Mountain" @default.
- W2365207941 hasPublicationYear "2010" @default.
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