26 They also discovered a highly significant correlation between biomass and hydraulic retention time ( p < 0.01), further indicating that the higher the hydraulic retention time in large reservoirs, the higher the primary productivity of the reservoir.
31 The Chla concentrations in all reservoirs show a decreasing trend with depth.
In the NZD and XW Reservoirs, the C/N ratios show an increasing trend with depth, indicating that the surface layer may have accumulated more organic matter with a low C/N ratio (such as algal organic matter). 40 The C/N ratios of terrestrial soils in this area ranged from 6 to 16 with a mean value of 9.6. 40 Particulate organic carbon (POC, mainly algae organic matt