水杉原生母树群落乔木层优势种生态位

Niche of Tree Layer Dominant Population in the Original Metasequoia Glyptostroboides Mother Trees Communities

利用民族学调查法和群落生态学常规调查法,对水杉(Metasequoia glyptostroboides)原生母树群落乔木层主要物种的生态位宽度与生态位重叠进行了研究,结果表明:水杉的重要值及生态位宽度值均最大,最能适应群落内部的环境,在群落中处于优势地位。水杉与柳杉之间的生态位重叠值最大,为0.819,水杉与杉木之间的生态位重叠值较大,为0.807,存在较大的竞争。柳杉与杉木的生态位重叠值为0.729,它们在群落垂直结构上处于同一层次,对光和空间竞争激烈。为了更好地适应群落内部环境,各个物种在群落中占据的位置发生了分化。

In this paper, ethnology investigation method and community ecology conventional survey method were used to study the niche breadth and niche overlap of tree layer main species in the original Metasequoia glyptostrobo- ides mother trees communities. Metasequoia glyptostroboides which was most adaptable to the environment in the community and occupied the dominant position in the community had the biggest important value and niche breadth value. The most niche overlap value of Metasequoia glyptostroboides and Cryptomeria fortune was 0. 819. The niche overlap value of Metasequoia glyptostroboides and Cunninghamia lanceolata was 0. 807. There was a big competition among these spieces. The niche overlap value between Cryptomeria fortunei and Cunninghamia lanceolata was 0. 729, which were on the same level in the community vertical structure and had a fierce competition in sunlight and space. In order to better adapt to the internal environment in the community, there was differentiation among the location of each species in the community.