论文部分内容阅读
研究了人为干扰对东莞市大岭山镇风水林群落树种组成及多样性的影响。多响应置换过程(MRPP)分析结果表明,风水林树种组成在轻度干扰与中度干扰(P=0.023,A=0.216)、重度干扰间(P=0.045,A=0.226)存在显著差异,而中度干扰和重度干扰间则不存在显著差异(P=0.124,A=0.148)。随着人为干扰强度的增大,轻度干扰、中度干扰和重度干扰下林木胸径和树高随之减小。Shannon-Wiener指数、Simpson指数、Margalef指数和Pielou指数一致呈现出中度干扰>重度干扰>轻度干扰的格局,与中度干扰假说相符合。轻度干扰、中度干扰和重度干扰下Whittakerβ多样性分别为0.501、0.647和0.889,较好地反映了3个风水林在不同人为干扰强度下的生境异质性。
The effects of anthropogenic disturbance on species composition and diversity of feng shui forest community in Dalingshan Town, Dongguan City were studied. MRPP analysis showed that the tree species composition of Fengshui forest was significantly different between mild and moderate disturbance (P = 0.023, A = 0.216) and severe disturbance (P = 0.045, A = 0.226) There was no significant difference between moderate and severe disturbance (P = 0.124, A = 0.148). With the increase of human disturbance intensity, the DBH and tree height of the trees decreased with mild disturbance, moderate disturbance and severe disturbance. The Shannon-Wiener index, Simpson index, Margalef index and Pielou index show a pattern of moderate interference> severe interference> mild interference consistent with the moderate interference hypothesis. The Whittaker β diversity under mild, moderate and severe disturbance was 0.501,0.647 and 0.889, respectively, which better reflected the habitat heterogeneity of three feng shui forest under different artificial disturbance intensity.