Landscape Pattern Analysis And Plant Landscape Evaluation Of Xianghu Wetland Park

The study takes Xianghu Wetland Park as the research object.The data of 9 types of landscape elements are extracted by Arc Gis software,and analyzes the landscape pattern.Based on this,the species richness index(S),diversity index(Shannon-Wiener index)and evenness index(Pielou index)are used to study the plant communities of the Xianghu Wetland Park in the four plant landscape units of the Water-type plant community,the Road-type plant community,the Building-type plant community and the Land-type plant community.And this paper constructs the plant landscape evaluation system with the method Analytical Hierarchy Process(AHP),and analyzed the plant landscape of the park and the plant configuration of the four plant landscape units.The main research results show that:1.Different type of the patch area,patch perimeter and patch number is not balanced,it shows that the water patch number is the least,the area is the largest accounted for 57.47%,the number of woodland patch is the largest and area accounted for 17.75%;The five functional areas and nine landscape types constitute a unique pattern of park space.The corridor density is moderate,and the water patch,woodland patch and open-forest patch are three dominant plaques;The pattern of landscape patches is simple and regular,and the spatial distribution pattern shows that small patchs embedded in large landscape patches,it formed a relatively complete green system and beautiful landscape;The park landscape diversity index is 4.5765,the evenness index is 0.6066,the fragmentation index is 3.9961,it is recommended to enhance the connectivity of the dominant landscape and pay attention to the balance of different landscape types in the future landscape construction.2.There are 289 species vascular plants,belonging to 94 families and 201 genera.,and the ratio of arbor to shrub to vines to bamboo to herbs is nearly 18:18:2:1:22.There are 205 kinds of native plants,accounting for 70.93% of the total species,the ratio of native tree species to exotic tree species is closer to 7:3;There are 119 species of flower plants,97 species of foliage plants,46 species of view plants,21 species of fruit plants and 7 species of branch plants in the park.In the park,the Shannon-Wiener diversity index is 3.3119,the Pielou evenness index is 2.2103,and the average number of species is 13.55.3.The AHP method was used to construct the plant landscape evaluation system of Xianghu Wetland Park from three aspects: landscape ecology,landscape ornamental and landscape function.Plant landscape evaluation level is divided into one,two,three,four.There are 7 first-class plant landscapes,36 second-class,30 third-class and 3 fourth-class.Four types of plant landscapes were ranked as follows: the Water-type plant community > the Land-type plant > the Building-type plant community > the Road-type plant community.4.Based on the analysis of the spatial heterogeneity and configuration of the plant landscape in the Xianghu Wetland Park,and put forward the existence problem and make the appropriate recommendations.