Numerical classification and ordination of forest communities in Caohai basin

WU Hua,ZHANG Jianli,FAN Yiwen,YU Lifei,YAN Lingbin,YUAN Congjun

Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2013, Vol. 37 ›› Issue (03) : 47-52.

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南京林业大学学报（自然科学版）
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Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2013, Vol. 37 ›› Issue (03) : 47-52. DOI: 10.3969/j.issn.1000-2006.2013.03.009

Numerical classification and ordination of forest communities in Caohai basin

  • WU Hua1,ZHANG Jianli1,2,FAN Yiwen1,YU Lifei1*,YAN Lingbin1,YUAN Congjun1
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Abstract

In this research, a typical sampling method was adopted to sample in forests of Caohai basin. And based on the data from 22 sample plots, forest communities in Caohai basin were investigated using TWINSPAN and DCA and CCA in order to analyze the structure of the communities.(1)The results of TWINSPAN classification indicated that these quadrate were classified into 7 types based on the species of Caohai basin, and they were further verified in the DCA two-dimensional ranking diagram.(2)CCA ordination results showed that the contribution in descending order was elevation,aspect, slope,and slope position.The first axis expressed the gradient of altitude among the communities,indicating the function of temperature.On the other hand,the second axis showed significant correlation with slop and aspect,which suggested that humidity,illumination and other things played key roles in community assembly.The results also indicated that the distribution of the vegetation communities was mainly impacted by two environment factors including elevation and aspect.At the same time, the vertical distribution character was obvious.

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WU Hua,ZHANG Jianli,FAN Yiwen,YU Lifei,YAN Lingbin,YUAN Congjun. Numerical classification and ordination of forest communities in Caohai basin[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2013, 37(03): 47-52 https://doi.org/10.3969/j.issn.1000-2006.2013.03.009

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