兰州市南北两山草本植物多样性研究

Study on the diversity of herbaceous plants in the northern and southern mountain areas of Lanzhou

摘要:

以兰州市南北两山面山草本植物为研究对象,采用野外调查和室内分析相结合的方法,研究了兰州市南北两山面山草本植物优势种组成、物种多样性。结果表明:调查区域有野生草本植物23科50属64种,优势科主要集中在禾本科、菊科、豆科、藜科、蒺藜科等;优势种为冰草和铺散亚菊,其中冰草在4个区均有生长,生长范围广,适应性强;铺散亚菊在3个区出现,适应性弱于冰草;七里河区野生草本植物的Margalef丰富度、Simpson多样性以及生态优势度均最高,安宁区野生草本植物的均匀度最高。建议在南北两山面山绿化时应不断优化植物群落空间结构,增加植物多样性和群落的稳定性。

Abstract:

This study investigated the composition of dominant species and species diversity of herbaceous plants in the southern and northern mountainous areas of Lanzhou City,through a combination of field survey and laboratory analysis.The results showed that there were 23 families,50 genera and 64 species of wild herbaceous plants in the entire survey area.Gramineae,Compositae,Leguminosae,Chenopodiaceae and Tribulaceae were dominant plant families.The dominant species were Agropyron cristatum which was found in all four areas with wide growth range and strong adaptability,and Ajania khartensis which was found in three areas.The Margalef richness,Simpson diversity and ecological dominance of wild herbs in Qilihe District were highest,and the uniformity of wild herbs was highest in Anning District.It was suggested that the spatial structure of plant communities should be continuously optimized to increase plant diversity and community stability.