不同人为干扰强度下甜槠群落物种多样性比较分析  

Species Diversity of Castanopsis eyrei Communities under Different Human-caused Disturbance

作　　者：杨梅[1] 林思祖[2] 曹光球[2] 

机构地区：[1]广西大学,南宁530004 [2]福建农林大学

出　　处：《东北林业大学学报》2009年第7期30-32,共3页Journal of Northeast Forestry University

基　　金：福建省自然科学基金(B0710005);福建省科技厅重大专项(2006NZ0002);福建省科技厅创新平台(2007N2008)资助

摘　　要：采用Margalef丰富度指数(dM)、Shannon-Winener指数(H′)、Pielou均匀度指数(J)、均优多指数(Z),研究了不同人为干扰强度(轻度和重度)对甜槠(Castanopsis eyrei)群落物种多样性的影响。结果表明,由于不同强度的人为干扰导致群落生态因子、种群繁殖对策发生明显变化,物种的数量特征和分布特征产生差异,使重度人为干扰群落的物种多样性比轻度人为干扰群落的高,但乔木层的Shannon-Wiener指数比轻度人为干扰群落低,灌木层和草本层则较高。重度人为干扰阻碍和延缓了群落的恢复进程,当干扰强度减弱时,群落中原有种群逐渐恢复并有新种侵入。The influences of human-caused disturbance on species diversity of Castanopsis eyrei communities were studied in terms of Margalef abundance index, Shannon-Wiener diversity index, Pielou evenness index, and evenness-dominance-abun- dance index. Results showed that the ecological factors and the reproductive strategies of population significantly changed under different intensities of human disturbance, which caused the differences in quantitative characteristics and distributive characteristics of species. Species diversity of the communities under intense human-caused disturbance was higher than that under slight human-caused disturbance, but the Shannon-Wiener index of the communities was lower in arbor layer and was higher in shrub and herb layers compared with those under slight human-caused disturbance. Intense humancaused disturbance delayed the rehabilitation process of the communities, but when the disturbance became weak, the original population resumed gradually and new population invaded.

关 键 词：人为干扰 甜槠群落 物种多样性 

分 类 号：S718[农业科学—林学]