RAP评估中的种子植物区系特征

在对中国西南山地热点地区的生物多样性快速评估调查中得出康定、丹巴、雅江三地有种子植物115科,486属,1385种;其中,裸子植物5科,12属,36种;被子植物110科,474属,1349种.区系分析显示该植物区系起源古老,地理成分复杂,整体有明显的过渡性;在科与属级水平上,呈现出明显的泛热带和温带特性;该区优势分类群明显,单种属和少种属异常丰富.

Floristic Characteristics of Seed Plants in RAP Evaluation in Kangding, Danba and Yajiang of Ganzi Prefecture

Based on the data collected in an RAP(rapid assessment procedure)evaluation made of the biodiversity in the southwestern China,1385 species of seed plants are recorded in Kangding,Danba and Yajiang,which belong to 486 genera and 115 families.Among them,5 families,12 genera and 36 species fall into the category of gymnosperms,and 110 families,474 genera and 1349 species into the category of angiosperms.The floristic analysis showed that the flora is of an old origin with complex geographic components.Viewed as a whole,the flora demonstrates striking transitional characteristics.At the family and genus level the flora shows obvious temperate and pan-tropic taxon features.The dominant families,genera and species are prominent.Monotypic and oligotypic species are also abundant.