Bioaccumulation of trace elements in trophic levels of wetland plants and waterfowl birds.
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.
Alhashemi
Azam Sadat Hosseini
AS
Department of Environmental Science, Graduate School of the Environment and Energy, Science and Research Campus, Islamic Azad University, Tehran, Iran. hoseini_azam@yahoo.com
Karbassi
Abdolreza R
AR
Kiabi
Bahram Hassanzadeh
BH
Monavari
Seyed Masoud
SM
Nabavi
Seyed Mohammad Bagher
SM
Sekhavatjou
Mohammad Sadegh
MS
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
D019216:Metals, Heavy; D014131:Trace Elements; D002104:Cadmium; D002857:Chromium; D007854:Lead; D003035:Cobalt; D008345:Manganese; D003300:Copper; D009532:Nickel; D015032:Zinc