The study looked at the food web in lake water during the melting season. By using stable isotopes and DNA sequencing, researchers found three main types of food webs: detrital, grazing, and mixed trophic. They discovered that the trophic transfer efficiency of the food web increased due to outside debris and pollutants, leading to potential ecological risks. The detrital and mixed trophic food webs had higher transfer efficiency compared to the grazing food web. The structure of the food web changed easily with environmental factors, while the grazing food web remained more stable.