The biological as well as supporting hydromorphological and physico-chemical quality elements are used in assessment of the ecological status for surface water bodies in Beijing area based on practices in the last five years.The biological quality elements include phyto-plankton,zooplankton and benthic invertebrates in quantities.The ecological status is classified into 5levels based on the monitoring data in 2014.The results show that 7 water bodies were classified as moderate status,accounting for 41.2% i...