戴云山黄山松群落主要树种更新生态位研究

Studies on Regeneration Niche of Main Species in Pinus taiwanensis Community in Daiyun Mountain

摘要:

为探讨戴云山黄山松(Pinus taiwanensis)群落的分化与动态更新, 采用改进的更新生态位宽度和更新生态位重叠公式研究黄山松群落主要树种的更新生态位。结果表明, 不同物种对空间资源的利用存在差异, 不同物种具有不同的更新生态位宽度, 物种间的更新生态位重叠值也不同。在群落乔木层, 黄山松的更新生态宽度最大, 因此, 黄山松在群落中占优势地位。黄山松与其它物种的更新生态位重叠值为0.1~0.39, 表明黄山松与其它树种存在共用资源利用谱。黄山松与窄基红褐柃(Eurya rubiginosa)和短尾越桔(Vaccinium carlesii)的更新生态位重叠值较大, 与这些物种的竞争和排斥作用明显, 不利于黄山松幼苗和幼树更新, 因此建议采用人工抚育措施并加强保护, 提高黄山松幼苗和幼树的成活率, 使群落处于稳定状态。

Abstract:

In order to understand the differentiation and regeneration dynamic of Pinus taiwanensis community in Daiyun Mountain, the regeneration niche of main species in the community was studied by using improved models of regeneration niche width and niche overlap. The results showed that different species used different spatial resources, different species had different regeneration niche width, and regeneration niche overlaps among species were also different. Pinus taiwanensis was dominant in the community. Regeneration niche overlaps between Pinus taiwanensis and other species ranged from 0.1 to 0.39, which indicated that P. taiwanensis and other species shared common?resource utilization spectrum. The regeneration niche overlaps between P. taiwanensis and Eurya rubiginosa, Vaccinium carlesii were high, which these species had obvious competition and rejection effects, so that the seedlings and saplings of P. taiwanensis was difficult to generate. Therefore, it was suggested that survival of seedlings and saplings of P. taiwanensis should increase for making community stable by strengthening management and protection.