Effects of hydrological regulation and anthropogenic pollutants on Dongting Lake in the Yangtze floodplainChanges in carbon and nitrogen cycling in a floodplain lake over recent decades linked to littoral expansion, declining riverine influx, and eutrophicationDetermination of geochronology and sedimentation rates of shallow lakes in the middle Yangtze reaches using 210Pb, 137Cs and spheroidal carbonaceous particlesHepatitis E virus infects neurons and brains