Distribution characteristics of nutrients and chlorophyll-a in a lake during the icebound season: A case study of a landscape lake in Changchun, China

The distribution characteristics and relationship between nutrients and chlorophyll-a in the ice layer and water during the icebound season in landscape water of a park in Changchun were studied. The results indicated that during the icebound season, the concentrations of nutrients in the ice layer were about one-third of those in water, and the concentration of the chlorophyll-a was about one-fifth. The majority of nitrogen in the water was inorganic; the descending order of the species being NH4+, NO3, NO2, and the phosphorus was mostly soluble in water. We also discovered that the concentration of chlorophyll-a increased slowly throughout the icebound season and that the concentrations of NH4+ and TP in the deep water were higher than those in the shallow water. Moreover, part of the experiment was simulated.