Abstract
Organochlorine pesticides (OCPs) and polycyclic aromatic hydrocarbons (PAHs) in eggshells and feathers of Little Egret (Egratta Garzetta) as well as in environmental compartments were investigated to assess the bioindication potential of non-destructive tissues of predatory birds for persistent organic pollutants (POPs) in wetlands. Higher concentrations of PAHs were detected in both feathers and eggshells than OCPs, which was consistent with the residue patterns in water, soil and food samples. Bioaccumulation was observed for both OCPs and PAHs in eggshells and feathers showing OCPs were more readily bioaccumulated than PAHs, mainly attributed to the bioconcentration route from water. Both eggshells and feathers of Little Egret could be used to predict the POP pollution in Poyang Lake wetlands, especially for PAHs. The higher bioaccumulation potential of feathers than eggshells suggests the wide application of feathers as non-destructive biomonitoring tool for particular POP pollution in wetland ecosystem.
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