Investigation of the Species Diversity of Urban Landscape Plant Communities in Maanshan City of Anhui Province

Landscape plant communities from various kinds of green spaces in Maanshan City are investigated,and totally 290 species of vascular plants are found(including varieties) which respectively belong to 198 genera and 95 families.The dominant species in each plant community,species richness,species diversity and community dissimilarity are analyzed,and the results show that ① The component of dominant species in the green spaces of scenic areas is obviously different from that in other three green spaces;the importance values of 10 dominant species in the green spaces of roads and scenic areas take a higher ratio,respectively 75.56% and 64.95% of the total,while those in the green spaces of parks and courtyards take a lower ratio,47.56% and 49.79% respectively.② Species diversities of different green spaces also vary greatly,among which the Simpson and Shannon-Wiener indexes of the shrub layer in scenic areas are the highest,0.91 and 2.55 respectively,and the species diversities of all green spaces follow the sequence of scenic areas parks courtyards roads;species diversity negatively correlates with disturbance degree and is directly influenced by plant furnishing and community construction.③ The dissimilarity coefficient between plant species in the green spaces of scenic areas and others is high,among which that of its shrub-layer species is the highest.