Journal
ENVIRONMENTAL POLLUTION
Volume 164, Issue -, Pages 227-234Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2012.01.021
Keywords
Cyanotoxins; Pulmonate; Prosobranch; Bioaccumulation patterns; MCs-risk assessment
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Funding
- Special S&T Project on Treatment and Control of Water Pollution [2008ZX07102-005, 2008ZX07105-004, 2009ZX07102-003-4]
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To investigate the bioaccumulation patterns of microcystins (MCs) in organs of two gastropods, samples were collected in Lake Dianchi monthly from May to October, 2008, when cyanobacteria typically bloom. The average MCs concentrations for Radix swinhoei (pulmonate) and Margarya melanioides (prosobranch) tended to be similar for the different organs: the highest values in the hepatopancreas (9.33 by 3.74 mu g/g DW), followed by digestive tracts (1.66 by 3.03 mu g/g DW), gonads (0.45 by 1.34 mu g/g DW) and muscles (0.22 by 0.40 mu g/g DW). Pulmonate had higher value than prosobranch because of the stronger bioaccumulation ability in hepatopancreas. The levels in organs of R. swinhoei were correlated with environmentally dissolved MCs, but influenced by intracellular MCs for M. melanioides. The estimated MCs concentrations in edible parts of M. melanioides were beyond the WHO's provisional tolerable daily intake (0.04 mu g/kg), suggesting the risk of consumption of M. melanioides from the lake. (C) 2012 Elsevier Ltd. All rights reserved.
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