湘中丘陵区石栎群落研究

以湘中丘陵区石栎 (L ithocarp us glaber)群落为调查研究对象 ,分析了群落的特征 ,定量计测了乔木层主要树种的生态位宽度和重叠值。结果表明 ,石栎群落垂直结构较为复杂 ,可分为乔木层、灌木层、草本层 ,亦有少量的层间植物。群落的优势种较明显 ,乔木层的物种多样性指数较高。主要树种生态位宽度值大小顺序为 :石栎、苦槠、木荷、白栎、拟赤杨、南酸枣和柏木。在生态位重叠值中 ,以优势种石栎与白栎、柏木、枫香、樟树、拟赤杨、木荷、南酸枣、苦槠、秃瓣杜英重叠值较大 ,枫香与苦槠的重叠值最小 ,石栎与马尾松、君迁子属中等重叠

Studies on Lithocarpus glaber community in Central Hunan's hilly country

WT5”BZ]The community characteristics of the Lithocarpus glaber forest distributed in Central Hunan's hilly country were analyzed. The niche breadth and niche overlap for dominant species of the arbors layer were calculated. The results showed that the vertical structure of Lithocarpus glaber forest was rather complicated, and could be divided into arbors layer, shrub layer, herbaceous layer, and interstratum plants. The community had outstanding dominant species and the arbor layer possessed a comparatively high diversity index. The order of the values of niche breadth for dominant species in the arbor layer was as follow Lithocarpus glaber> Castanopsis sclerophylla> Schima superba> Quercus fabri> Alniphyllum fortunei> Choerospondias axillaris> Cupressus funebris. The values of niche overlap were found to be the largest between Lithocarpus glaber and Quercus fabri, Cupressus funebris, Liquidabar formosana, Cinnamomum camphra, Alniphyllum fortunei, Schima superba, Choerospondias axillaris, Castanopsis sclerophylla, and Elaeocarpus glabripetalus in the commuty, and to be at middle degree between Lithocarpus glaber and Pinus massoniana and Diospyros lotus, and to be the smallest between Liquidabar formosana and Castanopsis sclerophylla. WT5”HZ]