阴山北麓木本植物区系研究

Floristic analysis of woody plants in the northern foot of Yinshan Mountain

阴山北麓是典型的草原向荒漠的过渡区,由于其物种组成、植物群落结构以及生态功能上的特殊性,具有较为丰富的物种组成和复杂的植物区系。采用植物区系地理学的理论与方法,以实地调查为主,通过查阅相关文献,对阴山北麓木本植物区系组成、地理成分进行分析。研究表明:阴山北麓木本植物区系由16科38属68种植物组成。该区系木本植物≥10种的优势科有3科,含2种的属和含1种的属物种较为丰富多达31属,占区系植物总属数的81.58%。植物科分布包含5个分布型和1个分布变型,以世界分布型占优势。植物区系地理成分分布有11个分布型和4个分布变型,以温带分布型占主导地位。

The northern foot of Yinshan Mountain is a typical transition area from grassland to the desert,which has a particularly rich and complex species composition,plant community structure,and ecological function.Using the theory and methods of floristic geography and field investigation,we assessed the floristic and geographic compositions of woody plants in the northern foot of Yinshan Mountain.Our results show that the woody flora consists of 68 species,38 genera,and 16 families.Three dominant families with more than ten woody plant species were observed,including two genera and one species.Thirty-one genera accounted for 81.58%of the genera richness.Five distribution types and one distribution form in the flora family distribution was seen,and the world distribution type was dominant.Eleven distribution types and four distribution forms of floristic geographical elements were seen,and the temperate distribution type was dominant.