A Study Between Wetland Plant Community And Water Quality At The Lakeside Of Haizhu Lake In Guangzhou

Haizhu Lake National Wetland Park as the example of this paper,comprehensive utilization of field investigation,laboratory analysis and statistics analysis,for systemic revealed that the relationship between the wetland vegetation feature and the water environment,and use the method of economic substitution to evaluated the value of the ecosystem's service function.Hoping this stduy will be benefit to the city wetland's protect,manage and useful in future.The results showed that:?1?The survey results showed that there were 29 species of wetland plant in lakeside of the Haizhu Lake Wetland Park belonging to 17 families and 28 genera in summer;there were 28 species belonging to 18 families and 26 genera in same place in winter.So there were total 34 species of wetland plant in lakeside of the Haizhu Lake Wetland Park belonging to 20 families and 32 genera in range of search.Gramineae and Asteraceae were preponderant families in lakeside of the Haizhu Lake,Canna indica,Thalia dealbata,Pontederia cordata ect were the main preponderant species.?2?Thought monitor the water quality condition in Haizhu Lake discovered that the water quality fluctuated with the change of space and seasonal.According to<Surface Water Environment Quality Standard>most of the water environment factors keep in 3 class standard.The value of Cond,pH and Temperature in different sample piont keep steady and no obvious change.The value of COD,TP,NH₄⁺-N and DO have obvious different in seasonal.Generaly,the value of DO in summer were lower than in winter,the change tendency of different sample piont seem to accordance in different seasons and general tend to descend,the year removal rate reach to 30.56 percent;the value of TP in summer highter than in winter,in summer the value of the different sample piont no obvious change,in winter the value have obvious different and general tend to descend and the removal rate were 22.90 percent.Generaly,the value of NH₄⁺-N summer were lower than winter,the change tendency of different sample piont seem to accordance in different seasons,the removal rate were10.39 percent in summer and 51.97 percent,the total removal rate reach to62.36 percent.?3?The Principal Component Analysis to the water environment fators and the result showed that COD?TP?NH₄⁺-N and DO were the main factors to influence the water quality.The sort of between wetland plant and water environment factors revealed that wetland plant community have an effect on the quality of water environment in different seasons,in summer,the community of Canna indica+Cyperus papyrus,Clinopodium urticifolium+Thalia dealbata,and Colocasia esculenta+Canna indica have a low removal capacity to COD?NH₄⁺-N and DO,have a good removal capacity to TP,the community of Hydrocotyle vulgaris+Pontederia cordata,Canna indica+Gardenia jasminoides have an good effect on removal COD and NH₄⁺-N;in winter,the community of Hydrocotyle vulgaris+Acorus calamus,Pontederia cordata+Axonopus compressus have an good effect on removal TP?COD?NH3-N,the community of Hydrocotyle vulgaris+Canna indica,Thalia dealbata+Bidens pilosa to TP?COD?NH₄⁺-N have an bad effect.The species of Aphelandra ruellia and Pontederia cordata have an good removal to TP in winter than summer,Acorus calamus?Thalia dealbata Fraser and Colocasia esculenta have an good removal effect on NH₄⁺-N in winter than summer.?4?Evaluate the ecosystem service funcation value of the Haizhu Lake revealed that used the method of equivalent replacement evaluated the value of year's water quality cleanse ablity and counted that the total value of NH₄⁺-N were 2734.8 yuan,the total value of TP were 106 yuan,COD were 17706.24 yuan,finally,amount value of water quality cleanse in Haizhu Lake were about 750000 yuan one year.