重庆特有种子植物区系特征研究

基于野外调查和文献查询,统计重庆地区特有种子植物数量,分析论述了重庆特有种子植物区系特征。结果表明:(1)重庆特有种子植物共有153种,隶属于40科97属;这些特有植物中,草本最多,有103种,灌木、乔木次之。(2)地理成分复杂多样,种子植物科包含6个分布类型及1个变型;属包含8个分布类型及10个变型;种则依据重庆市生态功能区划分为11个类型。(3)科级水平上,热带-亚热带性质占57.14%,温带性质占42.86%;属级水平上,热带-亚热带性质占23.53%,温带性质占64.71%;体现了该区从热带向温带过渡的性质。(4)重庆特有种子植物具有明显分布中心,其分布多度序列为:金佛山常绿阔叶林生物多样性保护生态功能区大巴山生物多样性保护与水土保持生态功能区市郊水源水质保护生态功能区消落带人工湿地水质保护生态功能区。

Floristic Characteristics of Endemic Seed Plants in Chongqing

Based on field investigation and documents collection, we counted endemic seed plants in Chongqing, and analyzed their floristic characteristics. The results were as follows: (1) There were 153 endemic seed plant species in Chongqing, which belong to 97 genera and 40 families. Most of them were herbaceous plants, about 103 species, followed by shrubs and trees. (2) The geographical compositions were complex and diverse. There were 6 distribution types and 1 subtype for families, 8 types and 10 subtypes for genera. According to ecological function regionalization of Chongqing, the endemisms were divided into 11 types. (3) At the level of family, tropic subtropic elements occupied 57.14%, whereas temperate elements occupied 42.86%. At the level of genus, tropic subtropic elements occupied 23.53%, whereas temperate elements occupied 64.71%. Transitional characteristic is obvious. (4) The distribution centersis obvious and the abundance order was: Jinfo Mountain evergreen broad leaf forest biodiversity conservation eco function region>Daba Mountain biodiversity conservation and water and soil conservation eco function region>outskirts headwaters>hydro fluctuation belt constructed wetlands.