To better understand the distribution and composition of sedimentary bioclastic material in phytoplankton-dominated eutrophic lakes, we combined a spatial survey of surface sediments with sediment core analyses to quantify moisture content, ignition loss, pigments, total organic nitrogen, total nitrogen and biodegradable compounds changes in the littoral zones and off-shore areas. Results show that dissolved oxygen, pH and oxidation-reduction potential presented a clear downward trend with increasing depth, while the H₂S concentrations gradually decreased with increasing depth and then increased in deeper layers until they reached a maximum and remained stable. In the littoral zones, the physicochemical parameters were mostly higher than that in the offshore areas. In addition, the biodegradable compounds showed significant spatial variability. Results show that lipids (7.7 mg/g), followed by carbohydrates (4.5 mg/g), was the dominant component of sedimentary bioclastic material. Data shows that the distribution of high moisture content, ignition loss and biodegradable compounds were mainly localization in the surface 15 cm of sediments.