title: Bioaccumulation of trace elements in trophic levels of wetland plants and waterfowl birds.
abstract: Present study investigates relationships between total and bioaccessibility of trace elements (Cd, Co, Cr, Cu, Mn, NI, Pb, V, and Zn) concentrations in sediment and their bioaccumulation in species in Shadegan wetland in southwest of Iran. Bioavailability factor (BAF) and translocation factor (TF) were calculated in plants and trophic transfer factor (TTF) was determined in bird species. For this purpose, sampling of sediments, aquatic plants including Phragmites australis, Typha australis, Scripus maritimus and two bird species encircling Porphyrio porphyrio and globally threatened Marmaronetta angustirostris were carried out during winter 2009. Result of chemical analysis show that bioaccessibility concentrations of Mn (8.31 mg/kg), V (1.33 mg/kg), and Pb (1.03 mg/kg) are higher than other metals. The uptake trend of trace elements in plant decreases as root > stem > leaf. Accumulation levels of trace elements in different tissues of P. porphyrio and M. angustirostris are almost identical and considerable. Accumulation and toxicity of Cd in birds is more than plants. In addition, BAF of V, Pb, and Cr indicates high accumulation by plants and great pollution rate in the area of study. In S. maritimus TF for Mn, Cu, Pb, and V are high whereas in T. australis, Cu and Pb posses the highest TF. Also Cr, Co, Mn, Ni, and Zn have higher TF from stem to leaf than root to stem in P. australis. Finally, TTFs were compared in various bird species.
authors.affiliation: Department of Environmental Science, Graduate School of the Environment and Energy, Science and Research Campus, Islamic Azad University, Tehran, Iran. hoseini_azam@yahoo.com
authors.forename: Azam Sadat Hosseini
authors.initials: AS
authors.lastname: Alhashemi
authors.forename: Abdolreza R
authors.initials: AR
authors.lastname: Karbassi
authors.forename: Bahram Hassanzadeh
authors.initials: BH
authors.lastname: Kiabi
authors.forename: Seyed Masoud
authors.initials: SM
authors.lastname: Monavari
authors.forename: Seyed Mohammad Bagher
authors.initials: SM
authors.lastname: Nabavi
authors.forename: Mohammad Sadegh
authors.initials: MS
authors.lastname: Sekhavatjou
mesh_terms: D000818:Animals; D001717:Birds / Q000378:metabolism*; D002104:Cadmium / Q000378:metabolism; D002857:Chromium / Q000378:metabolism; D003035:Cobalt / Q000378:metabolism; D003300:Copper / Q000378:metabolism; D004784:Environmental Monitoring; D007492:Iran; D007854:Lead / Q000378:metabolism; D008345:Manganese / Q000378:metabolism; D019216:Metals, Heavy / Q000378:metabolism; D009532:Nickel / Q000378:metabolism; D010944:Plants / Q000378:metabolism*; D006109:Poaceae / Q000378:metabolism; D014131:Trace Elements / Q000378:metabolism*; D053833:Wetlands; D015032:Zinc / Q000378:metabolism
chemical_list: D019216:Metals, Heavy; D014131:Trace Elements; D002104:Cadmium; D002857:Chromium; D007854:Lead; D003035:Cobalt; D008345:Manganese; D003300:Copper; D009532:Nickel; D015032:Zinc