The Study Of Human Factor Influence On The Whooper Swan And The Ecological Environment Of The Swan Lake

Coastal wetland ecosystem is a special ecosystem affected by land-sea interaction that result in a vulnerability.Coastal wetlands are the habitat for many birds to survive.On the one hand,wetland birds were sensitive to changes in the external environment and could be the indicator of wetland environment changes.On the other hand,the behaviors of birds would affect the wetland environment.Coastal wetlands are also densely populated areas and the impacts of human activities on wetland environments are enormous.The impacts of human activies on birds and wetland environment are also an important development direction in wetland ecological studies.In this paper,we analyzed the impacts of human disturbance on the swans and nitrogen and phosphorus distribution in Swan Lake Wetland,and investigated the effect ofthe swans on the changes of nitrogen and phosphorus in the water under the disturbance of human factors.In this paper,through the field survey,sampling and data analysis,we got the following conclusions:(1)According to the eight surveys,there were 1208 swans overwintering at the Rong Cheng Swan Lake.The swans mostly distributed in four habitatsincluding salt water lagoon,estuary,beach and breeding pond.Human activities affected the numbers of the swans andtheir distributions in the Swan Lake.The most behaviors of the swans were resting followed by locomotion and feeding.We found that complementarity existed among the swan’s behaviors by correlation analysis.We found that human activities could affect the behaviors of the swans and change their wintering strategy and daytime behavior r hythms.By the simulation of feeding experiment,we found that feeding can attract the swan and feeding a certain degree of food,the number of swans would reached a stable.The smaller the food was,the more the fights among the swans became.(2)By feeding experiments,we found that the disturbance caused by the swan could cause the TN and TP in the water to rise and accelerated their migration and transformation between sediment and water i.The smaller the feeding was,the greater the increase in TN in the overlying water after disturbance was.The disturbance caused by the swan could reduce the concentration of TN and TP in the interstitial water of the sediment,which accelerated the release of nutrients nitrogen and phosphorus to overlying water.The disturbance caused by the swans could reduce the p H.We found that t he swans would have a limit on the biomass of the eelgrass zostera marinal by setting the quadratic experiments and would stop their feeding when the biomass of eelgrass zostera marinal was below this limit.(3)We found that Rongcheng Swan Lake was in the middle of potential eutrophication status of phosphorus.The distributions of TN and TP in the swan lake were quite different.From the northwest to the southeast,the TN content of the water showed the highest-lowest-high trend,and the TP content of the water body showed the highest-high-low-lowest-low trend.Human activities had a huge impact on the Rongcheng swan lake water and ecological environment.