深圳市大南山地区铁榄群落研究

Studies on Sinosideroxylon wightianum Communities in Dananshan Region of Shenzhen City,Guangdong Province,China

对深圳市大南山地区的主要植被进行调查研究。结果表明,铁榄(Sinosideroxylon wightianum)常生长在瘠薄坡地、陡峭沟谷中,是该地区最重要的天然林群落,常组成单优势群落,呈斑块状分布,也是该地区存留的少数次生常绿阔叶林群落之一;大南山地区的铁榄群落有10个主要类型,铁榄是常绿阔叶林植被的主要特征种;大南山地区铁榄群落结构简单,物种分布不均匀,物种多样性指数差异较大;铁榄以Ⅱ级小树为主,兼有Ⅰ级苗木和Ⅲ级壮树,表明铁榄在群落中的优势度仍将保持较长一段时间;铁榄与漆树等物种间的种间联结关系薄弱,表明群落处于群落演替的早期发育阶段。

Sinosideroxylon wightianum communities in Dananshan Region in Shenzhen City, Guangdong Province, China were investigated in 2006. The results showed that Sinosideroxylon wightianum was simple dominant species in communities, which usually grew at barren hill, slop field and hollow, with patch distribution. S. wightianum communities could be divided into ten types; and S. wightianum was a characteristic species in evergreen broad-leaved forests. The population structure of S. wightianum community was simple, species distribution was uneven, and species diversity index were different among communities. S. wightianum population was dominanted by class II small trees with class I seedlings and III strong trees, which indicated that S. wightianum population would keep dominant in communities in a long time. Interspecies association between S. wightianum and other species, such as Toxicodendron vernicifluum, was week, indicating that the communities were at early succession stage.