Su Xiao-Fei, Yuan Jin-Feng, Hu Guang, Xu Gao-Fu, Yu Ming-Jian
Ying Yong Sheng Tai Xue Bao. 2014 Jan;25(1):77-84.
The research was conducted on 29 land-bridge islands in the Thousand Island Lake (TIL), where long-term monitoring plots were set up during 2009-2010. The community attributes including species richness, Shannon index, plant mean height, plant mean diameter at breast height (DBH) and plant density along the edge-interior gradient from edge to interior forest were calculated to investigate the edge effect. The results showed that the species richness and Shannon index were affected through the whole gradient (larger than 50 m), while the range of edge effect was 20-30 m on mean plant height, and 10 m on plant density and mean DBH. Community attributes differed significantly among the edge gradients. The species richness and Shannon index peaked at the intermediate edge gradient. Plant density decreased and plant mean height increased along the edge to interior gradient. All five community attributes were significantly associated with the edge gradient, also different functional groups, evergreen or deciduous species, trees or shrubs, shade tolerant or shade intolerant species, were differentially influenced by the edge effect. It was demonstrated the influence of edge effect on the fragmented forest community varied with community attributes and functional groups.
该研究在千岛湖的29个陆桥岛屿上进行，于2009年至2010年期间设立了长期监测样地。计算了包括物种丰富度、香农指数、植物平均高度、植物胸径（DBH）平均值以及从边缘到内部森林沿边缘 - 内部梯度的植物密度等群落属性，以研究边缘效应。结果表明，物种丰富度和香农指数在整个梯度（大于50米）上受到影响，而边缘效应范围在平均植物高度上为20 - 30米，在植物密度和平均胸径上为10米。群落属性在边缘梯度间存在显著差异。物种丰富度和香农指数在中间边缘梯度处达到峰值。植物密度沿边缘到内部梯度降低，植物平均高度增加。所有五个群落属性均与边缘梯度显著相关，不同功能组，常绿或落叶物种、乔木或灌木、耐荫或不耐荫物种，受边缘效应的影响也不同。结果表明，边缘效应在破碎化森林群落中的影响因群落属性和功能组而异。
