Mercury and selenium biomagnification in a Brazilian coastal food web using nitrogen stable isotope analysis: A case study in an area under the influence of the Paraiba do Sul River plume

被引：74
作者：
Kehrig, Helena A. [1 ,2 ]
Seixas, Tercia G. [1 ,3 ]
Malm, Olaf [1 ]
Di Beneditto, Ana Paula M. [2 ]
Rezende, Carlos E. [2 ]
机构：
[1] Univ Fed Rio de Janeiro, IBCCF, Lab Radioisotopos Eduardo Penna Franca, BR-21941902 Rio De Janeiro, RJ, Brazil
[2] Univ Estadual Norte Fluminense, CBB, Lab Ciencias Ambientais, BR-28013602 Campos Dos Goytacazes, RJ, Brazil
[3] Pontificia Univ Catolica Rio de Janeiro, Dept Quim, BR-22453900 Rio de Janeiro, RJ, Brazil
来源：
MARINE POLLUTION BULLETIN | 2013年 / 75卷 / 1-2期
关键词：
Biotransference; Coastal aquatic biota; Ecological tracer; Trace-element; Tropical ecosystem; Western South Atlantic Ocean; RIO-DE-JANEIRO; TOP-PREDATOR FISH; TRICHIURUS-LEPTURUS; TRACE-ELEMENTS; TROPHIC RELATIONSHIPS; FEEDING ECOLOGY; BIOACCUMULATION; DELTA-N-15; DELTA-C-13; METAL;
D O I：
10.1016/j.marpolbul.2013.06.046
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Mercury (Hg), selenium (Se) and nitrogen (delta N-15) stable isotope were assessed in a tropical food web of Rio de Janeiro's north coast. Isotopic data on muscle suggest a difference related to this parameter along the food web; where top-predators (cetacean and voracious fish) displayed heavier delta N-15 over the entire food web. Both top-predators presented similar delta N-15 values. Cetacean displayed higher Hg and lower Se than voracious fish. Five trophic positions (TP) were found in relation to primary consumer as baseline, ranging from 2.0 to 4.0. Positive relationships were found between trace-element and delta N-15. The slope of regression equations (0.11 for Se and 0.21 for Hg) and food web magnification factors (2.4 for Se and 5.4 for Hg) showed that Hg presented higher rate of increase over the food web. Simultaneous measurements of trace-elements and ecological tracers emphasize the importance of TP into the trophic structure and distribution of Hg and Se throughout the food web. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：283 / 290
页数：8
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