title: Metal accumulation by submerged macrophytes in eutrophic lakes at the watershed scale.
abstract: Metal concentrations (Al, Ba, Ca, K, Li, Mg, Na, Se, Sr and Ti) in submerged macrophytes and corresponding water and sediments were studied in 24 eutrophic lakes along the middle and lower reaches of the Yangtze River (China). Results showed that these eutrophic lakes have high metal concentrations in both water and sediments because of human activities. Average concentrations of Al and Na in tissues of submerged macrophytes were very high in sampled eutrophic lakes. By comparison, Ceratophyllum demersum and Najas marina accumulated more metals (e.g. Ba, Ca, K, Mg, Na, Sr and Ti). Strong positive correlations were found between metal concentrations in tissues of submerged macrophytes, probably because of co-accumulation of metals. The concentrations of Li, Mg, Na and Sr in tissues of submerged macrophytes significantly correlated with their corresponding water values, but not sediment values.
authors.affiliation: Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Xing
authors.forename: Haoping
authors.initials: H
authors.lastname: Wu
authors.forename: Beibei
authors.initials: B
authors.lastname: Hao
authors.forename: Guihua
authors.initials: G
authors.lastname: Liu
mesh_terms: D035961:Alismatales / Q000737:chemistry; D059001:Aquatic Organisms / Q000737:chemistry; D002681:China; D005068:Eutrophication; D019015:Geologic Sediments / Q000737:chemistry; D006801:Humans; D060106:Lakes / Q000737:chemistry*; D019684:Magnoliopsida / Q000737:chemistry; D008670:Metals / Q000032:analysis*; D010944:Plants / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000706:statistics & numerical data
chemical_list: D008670:Metals; D014874:Water Pollutants, Chemical