Transfer of microcontaminants from sediment to chironomids, and the risk for the Pond bat Myotis dasycneme (Chiroptera) preying on them

作者: J.O. Reinhold , A.J. Hendriks , L.K. Slager , M. Ohm

DOI: 10.1023/A:1009958028204

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摘要: Transfer ratios of metals, PCBs, pesticides and PAHs from the sediment to chironomid larvae adults collected in a highly contaminated area, Biesbosch, were studied. Metal concentrations 0.28 (Cd), 0.02 (Cr), 0.52 (Cu), 0.06 (Hg), 0.03 (Pb), 0.32 (Zn) times those found standard sediment, on dry weight basis. Hg Zn well transported adult stage. Dry contaminant residues 0.38 0.23 0.62 1.03 0.08 0.94 (Zn). For PCBs pesticides, concentration fat (dry organic matter) varied around 3.3, which is consistent with laboratory studies. Organochlorine comparable lipids. However, non-ortho 1.7 higher adults. polycyclic aromatic hydrocarbons (PAH), larval fat:sediment (organic ranged 0.004 0.1. Adult: for between 0.2 0.6. naphthalene much transport ratio 2 was found. Chironomid are most important potential food source Pond bat, lives low densities Biesbosch. The measured chironomids do not exceed diet levels that thought be safe mammals. bats less areas contained PCB-concentrations 9, 33 76 mg kg−1 lipid weight, above cause reproduction effects Mink.

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