Dietary mercury exposure and bioaccumulation in amphibian larvae inhabiting Carolina bay wetlands

被引：21

作者：

Unrine, JM ^{[1
]}

Jagoe, CH ^{[1
]}

Brinton, AC ^{[1
]}

Brant, HA ^{[1
]}

Garvin, NT ^{[1
]}

机构：

[1] Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29803 USA

来源：

ENVIRONMENTAL POLLUTION | 2005年 / 135卷 / 02期

关键词：

amphibian; mercury; speciation; trophic transfer; wetland;

D O I：

10.1016/j.envpol.2004.11.003

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Inorganic mercury and methylmercury concentrations were measured both in guts and remaining carcasses of southern leopard frog (Rana sphenocephala) larvae from 10 Carolina bay wetlands in South Carolina, USA. Significant variation among bays in methylmercury and inorganic mercury concentrations existed both in guts and carcasses. There was a moderate negative correlation between dissolved organic carbon concentration in bays and mean inorganic mercury concentrations in guts. There was also a weak positive correlation between pH in bays and mean methylmercury concentrations in carcasses. The ratio of methylmercury to inorganic mercury decreased with increasing total mercury concentration in guts and in larvae, but the rate of decrease was highly variable among bays. Ratios of concentrations in carcasses to concentrations in guts were inversely related to gut concentration. Mercury concentrations in carcasses in some bays were within the range of concentrations at which adverse effects have been observed in laboratory studies of R. sphenocephala. (c) 2004 Elsevier Ltd. All rights reserved.

引用

页码：245 / 253

页数：9

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