福建万木林自然保护区沉水樟林种群生态位分析

Population Niche Analysis of Cinnamomun micranthum Forest in Wanmulin Nature Reserve of Fujian Province

摘要:

采用定量分析方法对福建万木林自然保护区12个样地13个主要种群的生态位宽度、生态位相似性比例、生态位重叠进行测定。结果表明，福建万木林自然保护区沉水樟林的优势种群多数为广生态位，对资源有一定共享性，其中沉水樟的生态位宽度最大，且在群落径级分布中占绝对优势，表明沉水樟种群在群落中具有比较强的生态适应性。种群之间的生态位相似比例较高，其中大于0.5的种对占44.9%；相对来说，沉水樟与生态位较宽树种的重叠值较大，生态位重叠值多为0.05~0.10，没有大于0.10的，表明目前沉水樟尚能适应该群落生境，与群落中其他树种竞争还不激烈，可以与生态位较宽的物种形成混交林。

Abstract:

The niche characteristics of 13 main species in Cinnamomun micranthum forest, including niche breadth, niche similarity proportion and niche overlap, were studied by the quantitative investigation method in Wanmulin Nature Reserve of Fujian Province. The results showed that most dominant species in the C. micranthum forest had wide niche, in which the niche of C. micranthum population was the widest with absolute dominant in diameter class, it indicated C. micranthum had strong ecological adaptability in community. The niche similarity proportion among different species was at high level, of which the species with niche similarity proportion above 0.5 reached 44.9%. The niche overlaps between C. micranthum and other broad-niche-breadth species were high, most from 0.05 to 0.10. It suggested that C. micranthum could adapt habitat and formed mixed forest with other wide-niche species at present.