| assessment of heavy metal pollution risks in yonki reservoir environmental matrices affected by gold mining activity. | this study reports the heavy metal (hg, cd, cr, cu, and pb) contamination risks to and safety of two species of fresh water fish (tilapia, oreochromis mossambicus and carp, cyprinus carpio) that are farmed in the yonki reservoir in the eastern highlands of papua new guinea (png). the upper reaches of the reservoir are affected by alluvial and large-scale gold mining activities. we also assessed heavy metal levels in the surface waters and sediments and in selected aquatic plant species from the ... | 2016 | 27663878 |