梅花山自然保护区不同海拔段天然杉阔混交林物种组成

梅花山国家级自然保护区内不同海拔段杉阔混交林中,杉木(Cunninghamia laceolata)、毛竹(Phyllostachys pubescens)、木荷(Schima superba)、上杭锥(Castanopsis lamontiivar.shanghangensis)、厚叶厚皮香(Ternstroemia kwangtungensis)和黄山松(Pinus taiwanensis)是主要建群种。在不同海拔段的群落中各建群种的优势变化明显。随海拔升高,乔木层中杉木、毛竹、木荷的优势下降明显,厚叶厚皮香、黄山松和上杭锥则随海拔升高其重要值增大。在下木层中,这些树种的优势明显下降,仅厚叶厚皮香在950-1250m的海拔段其重要值的排序进入前10位。在地被层中,部分树种幼苗的重要值有所提高,表明这些建群种有一定的更新潜力。

Species composition in natural mixed forest of Chinese fir and broadleaf trees at different altitudes in Meihuashan National Nature Reserve

Chinese fir, Phyllostachys pubescens, Schima superba,Castanopsis lamontii var. shanghangensis, Ternstroemia kwangtungensis and Pinus taiwanensis were edificators in natural mixed forests of Chinese fir and broadleaf trees at different altitudes in Meihuashan National Nature Reserve. The dominances of these edificators changed significantly at different altitudes. The dominances of Chinese fir, Phyllostachys pubescens and Schima superba in tree layer declined with altitude raising, while the dominant values of Ternstroemia kwangtungensis, Pinus taiwanensis and Castanopsis lamontii var. shanghangensis in tree layer increased with altitude ascending. The dominant values of these edificators declined significantly in undergrowth layer, except that the dominant value of Ternstroemia kwangtungensis in the community of altitude 950-1 250 m ranked in the first ten places. In ground layer, the dominances of seedlings of some edificators increased, meaning that these edificator species had a certain potentiality of regeneration.