Study on the habitat suitability of Pampus argenteus in the East China Sea and southern Yellow Sea
To understand the ecological characteristics of Pampus argenteus in the East China Sea and southern Yellow Sea,we analyzed the seasonal characteristics in the habitat distribution of Pampus argenteus in the area,based on the bottom-trawl survey data collected from the East China Sea and the southern Yellow Sea in May(spring),August(summer),October(autumn)of 2016 and January(winter)of 2017 and the environmental data collected from Global Marine Environmental Datasets(GMED)and European Union Copernicus Marine Environmental Monitoring Service(CMEMS),including depth,temperature,salinity,chlorophyll-a and dissolved oxygen.The seasonal suitability index curves of Pampus argenteus for different environmental variables were ploted.Boosted regression tree(BRT)model was used to determine the weight of each factor in HSI.The habitat index model of Pampus argenteus in the aera was constructed using weighted arithmetic mean model(WAMM)and weighted geometric mean model(WGMM),and the optimal model was selected by cross validations.The results showed that the most significant contribution to the total deviation of the HSI model in spring was water depth,its contribution rate was 43.47％,and the optimum range of water depth was 20-33 m.The most significant contribution to the total deviation of HSI model in summer was chlorophyll-a,its contribution rate was 67.18％,and the optimum range was 5.36-5.90 mg·m-3.The most significant contribution to the total deviation of HSI model in autumn was temperature,its contribution rate was 33.96％,and the optimum range was 21.16-23.81℃.The most significant contribution to the total deviation of HSI model in winter was dissolved oxygen,its contribution rate was 37.65％,and the optimum range was 287.31-297.49 mmol·m-3.In the algorithm selection for the HSI model,according to Akaike information criterion(AIC),it was found that WAMM was the optimal for the HSI algorithm model of Pampus argenteus in all four seasons.This study showed that HSI model could better reflect the seasonal distribution and habitat characteristics of Pampus argenteus in the East China Sea and southern Yellow Sea,and was crucial for the understanding and prediction of the distribution dynamics of Pampus argenteus in the East China Sea and southern Yellow Sea.
East China Seasouthern Yellow SeaPampus argenteushabitatenvironmentdistribution
万方数据
维普
