TY - JOUR
T1 - Bioaccumulation of selenium (Se) in the Cienega de Santa Clara wetland, Sonora, Mexico
AU - García-Hernández, Jaqueline
AU - Glenn, Edward P.
AU - Artiola, Janick
AU - Baumgartner, Don J.
N1 - Funding Information:
This research was funded in part by the Environmental Defense Fund (EDF) and by the USFWS National Wetlands Council. The authors thank the Consejo Nacional de Ciencia y Tecnologia (CONACYT) from Mexico for its fellowship, and the Soil, Water and Plant Analysis Lab for all their help. Thanks also to Juan Buitron, Bernabe Rico, and Jorge Torre who helped in the "eld as guides, experts, and friends and special thanks to all our anonymous reviewers. Research was coordinated with Juan Carlos Barrera and Jose Campoy from the Instituto Nacional de Ecologia (INE-SEMARNAP) and the authors are truly grateful.
PY - 2000
Y1 - 2000
N2 - The Cienega de Santa Clara, on the east side of the Colorado River delta, is a brackish wetland supported by agricultural drainage water from the United States that provides habitat for endangered fish and bird species. Bioaccumulation of selenium has created toxicity problems for wildlife in similar wetlands in the United States. This is the first selenium survey in the Cienega de Santa Clara. Ten sites were selected to collect water (dissolved), sediments (total), plants, invertebrates, and fish. Samples were collected from October 1996 to March 1997. Selenium was detected in all samples. Concentrations in water ranged from 5 to 19 μg/L and increased along a salinity gradient. Although water levels of selenium exceeded EPA criterion for protection of wildlife, levels in sediments (0.8-1.8 mg/kg), aquatic plants (0.03-0.17 mg/kg), and fish (2.5-5.1 mg/kg whole body, dry wt) did not exceed USFWS recommended levels. It is concluded from this study that the levels of selenium in water did not affect the overall health of the fish sampled. Therefore, it is important to maintain or improve the water quality entering this wetland to continue to have normal levels of Se in the food chain components. (C) 2000 Academic Press.
AB - The Cienega de Santa Clara, on the east side of the Colorado River delta, is a brackish wetland supported by agricultural drainage water from the United States that provides habitat for endangered fish and bird species. Bioaccumulation of selenium has created toxicity problems for wildlife in similar wetlands in the United States. This is the first selenium survey in the Cienega de Santa Clara. Ten sites were selected to collect water (dissolved), sediments (total), plants, invertebrates, and fish. Samples were collected from October 1996 to March 1997. Selenium was detected in all samples. Concentrations in water ranged from 5 to 19 μg/L and increased along a salinity gradient. Although water levels of selenium exceeded EPA criterion for protection of wildlife, levels in sediments (0.8-1.8 mg/kg), aquatic plants (0.03-0.17 mg/kg), and fish (2.5-5.1 mg/kg whole body, dry wt) did not exceed USFWS recommended levels. It is concluded from this study that the levels of selenium in water did not affect the overall health of the fish sampled. Therefore, it is important to maintain or improve the water quality entering this wetland to continue to have normal levels of Se in the food chain components. (C) 2000 Academic Press.
KW - Bioaccumulation
KW - Cienega de Santa Clara wetland
KW - Colorado River delta
KW - Food chain
KW - Gulf of California
KW - Lower Colorado River
KW - Selenium
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U2 - 10.1006/eesa.1999.1908
DO - 10.1006/eesa.1999.1908
M3 - Article
C2 - 10903827
AN - SCOPUS:0033886830
SN - 0147-6513
VL - 46
SP - 298
EP - 304
JO - Ecotoxicology and Environmental Safety
JF - Ecotoxicology and Environmental Safety
IS - 3
ER -