运用β多样性的测度方法探讨不同人为干扰强度对米槠林乔木层的影响

Effects of Different Intensities of Artificial Disturbance on Tree Layer of Castanopsis Carlesis Forest Using Method of β Diversity Measure

运用β多样性测度公式探讨了不同人为干扰强度(CK天然林、A级择伐更新、B级皆伐迹地天然更新、C级皆伐迹地人工促进天然更新、D级杉木林)对福建省武平县米槠林乔木层的影响。结果表明,应用二元属性数据的多样性测度方法,所测的β多样性测度(βWS,βC,βR,βT)随着干扰强度加大逐渐上升,而群落相似性指数(CJ和CS)随着干扰强度加大逐渐下降;应用数量数据的β多样性测度方法,所测β多样性指数(CN,CMH)随着干扰强度加大逐渐下降。每个测度公式相关关系都很紧密,相关系数都在0.87以上。

The effects of the different intensities of artificial disturbances on the tree layer （CK, the original Castanopsis carlesii forest; class A, the regeneration by selected cutting; class B, the natural regeneration in clear-cutting land; class C, the artificial measures promoting regeneration, and class D, Chinese fir stand） of the Castanopsis carlesii forest were studied using formula of β diversity in Wupin County, Fujian Province. The results showed that the β diversity indices were measured by binary data （βWC, βC, βR, βT） ascended gradually with the increasing of disturbance intensities, but the simility coefficients of community （CJ, CS） droped down gradually as the disturbance intensities increases, and so on the β diversity indices measured using numberical data （CN, CMH）. Relations of every measurement formula are very compact and coefficients of correlation all exceeded 0.87.