| This study took the vegetation of Luzui Villa Scenic Area in Shenzhen City as the research object,and carried out an in-depth study on the vegetation types,plant species composition,plant group structure and plant diversity in the scenic area,and simultaneously performed the existing natural landscapes.Landscape evaluation,analysis of the status of plant communities and landscapes,and propose further improvements and optimization recommendations.The main research results are:1.Composition of plant speciesThe Luzui Mountain Villa Scenic Area is rich in plant species.After investigation and statistics,there are 231 species of plants in the scenic spot,belonging to 175 genera of 77 families,accounting for 13.94% of the plant species currently recorded on the Dapeng Peninsula,of which 8 families and 8 genera of ferns 11,There are 6species of gymnosperm,5 families and 5 genera,and angiosperm is 64 families,162 genera,and 214 species.The number of plant species is at a low level in other scenic spots in China.Judging from the plant life style,the number of plants in Luzui Mountain Village was ranked as shrub plants> herbaceous plants> arborous plants.The shrub plants in the investigated plots were higher than other life-type plants.From the aspect of plant sources,195 species of native plants accounted for 84.42%of the total species,23 species of domestically introduced plants accounted for 9.96%of the total species,11 species of plants introduced abroad,accounting for 4.76% of the total species,and naturalized plants2 Species,0.87% of the total species.2.Study on the characteristics of plant community structureFrom the perspective of the hierarchical structure of 15 plant communities,the stratification of the natural communities in the Luzui Mountain Village Scenic Area is not obvious.There are two types of structures: the tree-shrub-herb and the shrub-herb.The main structures of the mangrove community are the tree-shrub and shrub-herb,the stratification of layers is obvious,and the hierarchy of artificial plant community is more obvious.From the point of view of plant community coverage,artificial communities and mangroves are generally lower than natural communities,and a few natural communities are equal to artificial communities.From the dominant species of all plant communities,the dominant species of tree species in all plant communities were Mallotus paniculatus and Sapium discolor,which occurred four times in total.The dominant species in the shrub layer appeared the most frequently.In Psychotriarubra,there were 6 times in total.The most dominant species in the herb layer were Pteris semipinnata and Pteris ensiformis.There were 4 occurrences in total,indicating that these plants were widely distributed in the Luzui Mountain Village Scenic Area.3.Research on plant community diversityFor the species diversity index,the average Simpson index size is: shrub layer>herb layer> tree layer for each level,Shannon-Wiener index average was shrub layer>herb layer> tree layer;In terms of ecological dominance index,the average value was ranked as arbor layer> herb layer> shrub layer;in terms of abundance index,the average value of Odum index was shrub layer> herb layer> arbor layer;in terms of evenness index,the average of Pielou index was Shrub layer> Tree layer> Herb layer.In terms of plant community types,combined with data on species diversity,ecological dominance,abundance,and evenness index,it was shown that natural plant communities> mangrove communities> artificial plant communities;According to the similarity coefficient of plant communities,except for the high similarity coefficient among the mangrove communities in the Luzui Mountain Villa Scenic Area,the similarity among the other plant communities is low,which indicates that the species diversity in the entire area is high.4.Plant Landscape EvaluationThrough the AHP Analytic Hierarchy Process(AHP),an evaluation system was constructed.After the consistency test,the weight values of each evaluation factor were obtained.From the perspective of the total weight of the plant,the ranking of the assessment factors at each level of Luzui Village Landscape Evaluation was: species diversity> plants Homeland>Landscape richness>Ecological dominance index>Plant health status>Comfort>Accessibility>Environmental harmony>Plant color>Viewing diversity>Artistic beauty>Hydrophilicity,can be seen from the criterion level.The weight of the ecological function factor is 0.7172,the weight of the aesthetic function factor is 0.0881,and the weight of the social function factor is 0.1947.Experts in the evaluation of the community focus on the ecological function indicators of the community,and the ecological function indicators focus on the two indicators of species diversity and plant locality,and other indicators only play a supporting role in landscape evaluation.Judging from the results of comprehensive landscape assessment,there are 1 Class I plant landscapes in the Luzui Village Landscape Community,accounting for 6.66% of all communities;6 Class II plant landscapes,accounting for 40% of all communities;Class III Plants There are six landscapes,accounting for 40% of all communities;two plants of Grade IV have 13.33% of all communities. |
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