机构地区: 西南林学院
出 处: 《西部林业科学》 2008年第2期40-46,共7页
摘 要: 经调查,对云南省元江自然保护区硬叶常绿阔叶林种子植物科、属、种的组成,分布区类型,区系特征等进行了统计和分析。结果表明:(1)元江自然保护区硬叶常绿阔叶林内计有种子植物47科、91属、103种。(2)该群落种子植物科、属、种的热带成分与温带成分之比分别为15?1、10.38?1、7.58?1;其热带程度虽逐级降低,但仍然表现出很强的热带性质。其在科级和属级单位上热带性质的分布型均以泛热带成分(包括变型)占主导地位;在种级单位上占首要位置的是热带亚洲分布(包括变型)。(3)该群落种子植物区系表现出一定的古老性和次生性。(4)该群落种子植物特有种类型较丰富,中国特有种有15种,云南特有种2种,元江特有种有1种。 The plant components, distribution types and floristic characteristics of ever-green hard and broad leaved forests in Yuanjiang Nature Reserve were studied. The results are as follows: 1) There are 47 families, 91 genera and 103 species of seed plants in ever-green hard and broad leaved forests in Yuanjiang Nature Reserve; 2) The proportion of tropical to temperate of family, genus and species were 15 : 1, 10. 38 : 1 and 7.58 : 1 respectively, the main floristic feature is tropical, Pan tropical elements are dominant in family and genus levels, tropical Asia distribution hold the dominant position in species and variety levels; 3) The flora was ancient and secondary; 4) The endemism within the flora is rich, there were 15 species endemic to China, 2 species endemic to Yunnan and 1 species endemic to Yuanjiang.