The effects of phosphorus dynamics on snails of epiphytic gastropods in mesocosm lake ecosystem
磷的不同动态变化对模拟湖泊生态系统中附草螺类的影响

Different phosphorus dynamics have significant impacts on the biomass of snails in the first month during the experiment. With the same total loading amount, the biomass of snails in the low-frequency patterns increases faster than that in the high-frequency patterns. But the significance decreases with the increased experiment time. Nutrient addition has increased snails by a large amount. Correlation analysis show that the biomass of the epiphyte has negative correlation with the biomass of snails, but the correlation is insignificant between the biomass of the macrophyte and the biomass of snails, which indicates snails are the important factor in the complex snail-epiphyte-macrophyte system and the interaction between the macrophyte and snails changes in the different lake ecosystems.