Differences in Methylmercury and Inorganic Mercury Biomagnification in a Tropical Marine Food Web

被引：28
|
作者：
Seixas, Tercia G. [1 ]
Moreira, Isabel [1 ]
Siciliano, Salvatore [2 ]
Malm, Olaf [3 ]
Kehrig, Helena A. [3 ,4 ]
机构：
[1] Pontificia Univ Catolica Rio de Janeiro, Dept Quim, BR-22453900 Rio De Janeiro, Brazil
[2] Escola Nacl Saude Publ Fiocruz, Dep Endemias, BR-21041210 Rio De Janeiro, Brazil
[3] Univ Fed Rio de Janeiro, IBCCF, Lab Radioisotopos Eduardo Penna Franca, BR-21949900 Rio De Janeiro, Brazil
[4] Univ Estadual Norte Fluminense, Lab Ciencias Ambientais, BR-28013602 Campos dos Goytacazes, RJ, Brazil
来源：
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY | 2014年 / 92卷 / 03期
关键词：
Trophic transfer; Tropical ecosystem; Marine biota; South Atlantic Ocean; Oligotrophic ecosystem; RIO-DE-JANEIRO; STABLE-ISOTOPE ANALYSIS; TRACE-ELEMENTS; BIOACCUMULATION; FISH; BRAZIL; BIOCONCENTRATION; ECOSYSTEM; ESTUARY; GULF;
D O I：
10.1007/s00128-014-1208-7
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Methylmercury (MeHg), inorganic mercury (Hg-inorg) and their biomagnification factors (BMF) were evaluated along a non-degraded Brazilian bay food web. Highly significant differences (p < 0.0001) were found between MeHg and Hg-inorg concentrations among all organisms (microplankton, shrimp, fish and dolphin). MeHg increased with increasing trophic position while Hg-inorg did not present the same pattern. BMF values for MeHg were higher than 1 for all trophic interactions from source to consumer, indicating that MeHg was transferred more efficiently and biomagnified over the entire web. Only one BMF exceeding one was observed for Hg-inorg (27) between microplankton and their consumer, planktivorous fish. BMF values for Hg-inorg were significantly different than those found for MeHg (20) at the base of the food web.
引用
收藏
页码：274 / 278
页数：5
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