百户湾森林群落优势种群空间生态位研究

对百户湾森林群落优势种群空间生态位进行了研究。结果显示，各优势种群在坡向和海拔梯度上的平均生态位宽度为0.22-2.13和0.22-2.00。石栎（Lithocarpus glabe）、四照花（Dendrobenthamia japonica var. chinensis）、短柄木包（Quercus glandulifera var. brevipetiolata）和青冈（Cyclobalanopsis glauca）具有较大的生态位宽度，而珙桐（Davidia involucarta）、弯尖杜鹃（Rhodendron youngae）生态位宽度较小。各优势种群对地上垂直空间的利用是互补的，但生态位重叠较大，存在明显的空间竞争。调查发现，它们竞争的主要层次是5-15 m的垂直空间范围。第1期艾训儒百户湾森林群落优势种群空间生态位研究

Dominate Populations Spatial Niche of Forest Community in Baihuwan

The spatial niche of dominate forest populations in Baihuwan forest regions were discussed in this paper.The results showed that the average niche breadth of dominate populations was 0.22~2.13 and 0.22~2.00 along the aspect and altitude gradients respectively.The average niche breadth of Lithocarpus glabe,Dendrobenthamia japonica var.chinensis,Quercus glandulifera var.brevipetiolata and Cyclobalanopsis glauca had higher value compared to Davidia involucarta and Rhodendron youngae.The utilization spectrum of dominate populations in vertical space was complementary,but they had higher interspecies niche overlap value and extensive competition.It was found that the main story of interspecies competition in vertical space was 5~15 meter.