Sedimentary organic and inorganic records of eutrophication and hypoxia in and off the Changjiang Estuary over the last century

•Eutrophication indicated by lipid biomarkers became severe after 1960s in the CEMA.•Hypoxia indicated by RSE Mo was contemporaneous with eutrophication in the CEMA.•Eutrophication and hypoxia in the CEMA resulted mainly from river-derived nutrients.•No significant eutrophication or hypoxia was recorded in the SCIMA over the last century.