No abstract

In this study, the concept of functional feeding groups was used to classify zooplankton community into functional groups among three seasons (spring, summer and autumn). A total of 30 zooplankton species were sampled in the Tuanjie Reservoir and identified into seven functional groups. Environmental factors and zooplankton functional group biomass were both varied in spatially and seasonally. Water transparency (SD), dissolved oxygen (DO), pH, N:P and dissolved iron (Fe 3+ ) were higher in autumn while total phosphorus (TP), chemical oxygen demand (CODMn) and dissolved copper (Cu 2+ ) were higher in spring, and temperature (T) and ammonium nitrogen (NH4 + -N) were higher in summer. Zooplankton functional groups biomass was higher in summer, followed by spring and autumn. In spring, zooplankton functional group only dominated by group PF, while in summer and autumn dominated by group PF and RF. Spearman and RDA results showed that SD, conductivity (COND), DO, NH4 + -N, nitrate nitrogen (NO3 --N) and CODMn were the major factors influencing zooplankton functional groups in Tuanjie Reservoir.