Study On The Relationship Between The Distribution Of Aquatic Plant Community And The Environment Factors In Baiyangdian Lake

In this paper,the Baiyangdian Lake wetland in the North China Plain was selected as the research area.The spring,summer and autumn surveys were carried out in 2018.The aquatic plant species distribution and community characteristics of the Baiyangdian Lake wetland were studied,and different seasons of Baiyangdian Lake were collected.Water samples,through indoor laboratory analysis,determine water environmental factors,explore changes in water environmental factors in different seasons and different regions,study the correlation between water environmental factors and their relationship with aquatic plants,and restore and protect aquatic plants.propose.The main findings are as follows:?1?In 2018,24 species of aquatic plants were surveyed in Baiyangdian,distributed in 14families.Valerian,lotus and goldfish were dominant species.The growth status of aquatic plants varies from season to season.In the spring,Baiyangdian is widely distributed,and in summer and autumn,lotus and goldfish are dominant species.?2?Through field investigation,the plant clusters of Baiyangdian are Potamogeton crispus,lotus,goldfish,castor-tooth,spikelet,goldfish,and sophora,etc.The results show that the plant clusters of Baiyangdian are Potamogeton crispus,lotus,goldfish,Castor-toothed,tassels,and so on.The dominant cluster in Baiyangdian area is different in different seasons.The dominant cluster in spring is Potamogeton crispus.In summer and autumn,the dominant cluster is lotus cluster and goldfish cluster.The dominant degree of community distribution was also different in different areas,such as the spikelike fox-tailed algal cluster in Read shad,and the purple duckweed cluster in the Chadian area,which was mainly composed of Pallophora sophora var.sophora.?3?there are space-time differences among the water environmental factors in Baiyangdian Lake,and the spatial-temporal distribution of environmental factors in Baiyangdian wetland is different.From the point of view of time,the?TN?content of total nitrogen shows spring>summer>autumn.The content of total phosphorus?TP?showed the order of summer>autumn>spring.The pH value of water body was spring>summer>autumn,the content of dissolved oxygen?DO?in water was autumn>spring>summer,and the five-day biochemical oxygen demand?BOD₅?was summer>autumn>spring.In space,the content of total nitrogen?TN?in spring was the highest,reaching 2.574mg/L,and total phosphorus?TP?was the highest in spring.The content of dissolved oxygen?DO?was significantly increased in Zhazhadian area,and the 5-day biochemical oxygen demand?BOD5?was the highest in Pingyangdian Lake?8.97 mg/L?.In summer,the highest content of total nitrogen?TN?was found in duck breeding area,which was 3.8 mg/L,and the maximum value of total phosphorus?TP?in summer was 0.22 mg/L in Chaodidian Lake,with a maximum of 0.22 mg·The highest dissolved oxygen was 14.7 mg/L in Hujiawa and 7.68mg/L in biochemical oxygen demand?BOD₅?.The maximum?TN?value of total nitrogen in autumn was found in the starch region.The largest?TP?value of total phosphorus is delta lake,the maximum value of total phosphorus?TP?is 0.37 mg/L,and the largest value of dissolved oxygen is dayaquan,and the dissolved oxygen value is 14.15 mg/L,and the maximum value of total phosphorus is 0.37 mg/L,and the maximum value of dissolved oxygen is 14.15 mg/L,and the maximum value of total phosphorus is 0.37 mg/L.The largest value of biochemical oxygen demand?BOD₅?was sanjiao lake,which reached 9.92 mg.?4?the results of canonical correspondence analysis?CCA?showed that the effects of environmental factors on aquatic plants were different,and the effects of water environmental factors on aquatic plants were obviously different in spring and autumn.Among them,total phosphorus?TP?and transparency?Trans?in spring had the greatest influence.In summer,all the water environmental factors had significant effects on aquatic plants.In autumn,dissolved oxygen?DO?and transparency?Trans?.Were the most important factors affecting aquatic plants.Overall,the main factors affecting plant growth and distribution are water transparency?Trans?and total phosphorus?TP?.?5?It is suggested that the key factors affecting the growth and distribution of plants in Baiyangdian Lake should be controlled,and appropriate community combination should be selected according to the water quality and pollution conditions in different lake areas for rational design.At the same time,the monitoring and management of water quality in Lake wetlands and the management and control of artificial disturbances such as fisheries should be strengthened to restore the ecological environment of aquatic plants.