Urban lake pollution is one of the serious issues due to suffering of waste discharged from householders. However, there is a gap of knowledge about the diversity of zooplankton species and how metals accumulate in zooplankton in urban ecosystems. We addressed this by determining the rule of blooming macro-zooplankton in the Truc Bach lake and levels of two essential metals: copper (Cu), and zinc (Zn) and of three non-essential metals: arsenic (As), and lead (Pb) in water samples were determined. The results showed that cladocerans and copepods are macro-zooplankton dominant species in the Truc Bach lake. Water temperature significantly affects the variety of copepod blooming. Arsenic concentration in water collected from the lake exceeded the safety level of current Vietnamese technical regulation (QCVN 08- MT:2015/BTNMT). Arsenic concentration in macro-zooplankton positively correlated with metal concentrations in the water (p | Macro-zooplankton abundance in relation to metal accumulation and water quality in Truc Bach lake
