| Mangroves are mainly distributed in the intertidal zone of the land and sea binding area,or the estuary where the tide meets the sea.Such plant communities not only help protect the coast,provide a good habitat for the growth and reproduction of various plants and animals,but also provide a very good place for people to relax and visit.However,with the continuous development of social economy,the speed of urban construction is getting faster and faster,and the urban population is increasing rapidly.Human activities have greatly threatened the safety of mangrove wetlands,and the number and area of mangroves have decreased sharply.The investigation and study of mangrove plant communities will help fully understand the species and community status of mangrove plants,and have certain practical significance for better protection of local vegetation resources and scientific management in the future.In this paper,the mangrove species composition,distribution and species diversity of baguang mangrove in shenzhen city were comprehensively recorded through field sample square survey.By using relevant statistical software,the differences in community composition were analyzed.Based on the elements of plant landscape,the landscape characteristics of mangrove community were deeply analyzed.The results are as follows:(1)There are 88 species of plants in 72 genera of 38 families in baguang area,among which 12 species belong to 11 genera of 9 families belong to mangrove plants.Specifically,they are composed of 7 true red plants from 6 genera of 5 families and 5 semi-mangrove plants from 5 families and 5 genera.Compared with the same level region,there are high and low,is a medium low level.Among the 12 species of mangrove plants,there are mainly trees or shrubs,among which there are 5 kinds of trees and 6 kinds of shrubs.Only bracken fern is herbaceous.(2)Among the 8 mangrove communities investigated,the coastal mangrove communities in shuitou village had the most plant species.In addition,the average height and DBH of the community are higher than those of other plots.Thanks to the protection effect of the dam light silver leaf forest protection area,mangrove plants in the river and stream can grow safely,form a relatively stable community structure and have a strong self-repair ability.The binhai mangrove community in shuangkeng village has the least mangrove plants,mainly because the surrounding land and fish pond seriously affect the environment of the river,so there are only 3 species of semi-mangrove plants in the sample area.The average DBH and height of the coastal mangrove community in baguang village is the lowest,and the artificial project development activities and fishing around the sea seriously threaten the survival of the mangrove plants in this area.(3)The species diversity of the coastal mangrove community in baguang area is similar to that in other areas.In terms of species diversity,mangrove plant communities in the region and a half than true mangrove plant community,mangrove plant community than mountain area in terms of plant community,Shannon Wiener diversity index is different,have very similar overall Simpson,diversity index,however,by comparing the analysis we know that mountain flora shrubbery and mangrove plant community in comparison with a higher index.(4)Through the analysis and description of the landscape characteristics of the community,the better overall landscape characteristics of the community are semi-mangrove plant communities mainly composed of Casuarina equisetifolia and Hibiscus tiliaceus.This kind of community usually has more comparative plant color,seasonal phase,plant shape,leaf shape and fruit shape change more abundantly,and the combination of open and enclosure is the best spatial effect. |
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