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

页码：274 / 278

页数：5

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