人为经营干扰对人工雷竹林下植被多样性的影响

The Effects of Human Disturbance on Species Diversity of Phyllostachys praecox Grove

研究结果表明:(1)人为干扰导致了雷竹林群落层次结构简化,灌木层消失,草木层不明显。(2)不同干扰的雷竹林下植物变异大,群落相似系数低,优势种不同。(3)人为干扰强度增大,雷竹林下植物的丰富度,Shannon Wiener和Simpson多样性指数随之减少。(4)同样的干扰强度对差的立地条件上群落物种多样性的影响更大。提出了保护生物多样性、发展持续稳定雷竹林的经营措施。

The species diversity of Phyllostachys praecox grove in Linan, Zhejiang Province were investigated. The species diversity index, richness index and the coefficient of community similarity were compared for different human disturbance. The results indicated that:(1)The community structure of Lei bamboo forest were simplified because of intensive disturbance. Meanwhile, the disturbance caused the disappearance of the shrub layer and the lower richness of the herb layer.(2)Both the species and the dominant species were distinctly different under different human disturbance and the coefficient of community similarity between plots was also low.(3)ShannonWiener and Simpson diversity index and richness index decreased with the increase of human disturbance.(4)The influence of the disturbance for the lower site quality was more significant. In addition, the measures on how to protect the biodiversity and develop sustainable management of Lei bamboo forest were suggested.