沈阳浑河河岸带草本植物组成分布及其与生境因子的关系研究

Composition and Distribution of Herbaceous Plants and Their Relationship with Habitat Factors in the Riparian Zone of Shenyang Hunhe River

关键词:  园林植物  沈阳浑河河岸带  草本植物  物种组成  数量排序  生境因子

Key words:  landscape plant  riparian zone of Hunhe River in Shenyang  herbaceous plant  species composition  number ordering  habitat factor

摘要:

沈阳浑河河岸带是辽宁省重要的城市滨水生态廊道，其草本植物群落承担着生态和景观双重功能。运用植物数量排序方法，探究草本植物组成分布与生境因子的关系。结果表明：1)沈阳浑河河岸带草本植物共有26科65属70种，优势科为菊科、禾本科、唇形科和十字花科；2)半干旱草地和湿润草地生境的物种多样性最高，半干旱森林和湿润森林生境的物种多样性最低；3)草本植物物种种类组成和物种多样性组成均受生境因子影响，第一排序轴与海拔和郁闭度相关性最强，第二排序轴与土壤含水量显著相关。通过解析沈阳浑河河岸带草本植物自然分布的内在机制，为辽宁省城市河岸带草本植物选择，以及构建具有文化地域特色的草本植物群落提供理论依据。

Abstract:

The riparian zone of the Hunhe River in Shenyang is an important urban waterfront ecological corridor in Liaoning region, and its herbaceous plant communities undertake dual functions of ecology and landscape. The relationship between the composition distribution of herbaceous plants and habitat factors is explored by using the method of sorting the number of plants. The results show that: 1) There are a total of 70 species of herbaceous plants belonging to 65 genera and 26 families in the riverbank zone of the Hun River in Shenyang. The dominant families are Compositae, Poaceae, Lamiaceae, and Brassicaceae. 2) The species diversity is the highest in the semi-arid grassland and moist grassland habitats, and the lowest in the semi-arid forest and moist forest habitats. 3) The composition and distribution of herbaceous plants are all affected by habitat factors. The first sequencing axis has the strongest correlation with altitude and canopy closure, and the second sequencing axis is significantly correlated with soil moisture content. The research provides a basis for the selection of herbaceous plants in the urban riverbank zone of Liaoning region, and constructing herbaceous plant communities with cultural and regional characteristics.