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East versus West: Organic contaminant differences in brown pelican (Pelecanus occidentalis) eggs from South Carolina, USA and the Gulf of California, Mexico

Brown pelicans (Pelecanus occidentalis) were listed as endangered in the United States in 1970, largely due to reproductive failure and mortality caused by organochlorine contaminants, such as DDT. The southeast population, P.o. carolinensis, was delisted in 1985, while the west coast population, P....

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Published in:The Science of the total environment 2012-11, Vol.438, p.527-532
Main Authors: Vander Pol, Stacy S., Anderson, Daniel W., Jodice, Patrick G.R., Stuckey, Joyce E.
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description Brown pelicans (Pelecanus occidentalis) were listed as endangered in the United States in 1970, largely due to reproductive failure and mortality caused by organochlorine contaminants, such as DDT. The southeast population, P.o. carolinensis, was delisted in 1985, while the west coast population, P.o. californicus, was not delisted until 2009. As fish-eating coastal seabirds, brown pelicans may serve as a biomonitors. Organic contaminants were examined in brown pelican eggs collected from the Gulf of California in 2004 and South Carolina in 2005 using gas chromatography/mass spectrometry (GC/MS). Contaminants were compared using all individual data as well as statistically pooled samples to provide similar sample sizes with little difference in results. Principal components analysis separated the Gulf of California brown pelican eggs from the South Carolina eggs based on contaminant patterns. The South Carolina population had significantly (P
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The southeast population, P.o. carolinensis, was delisted in 1985, while the west coast population, P.o. californicus, was not delisted until 2009. As fish-eating coastal seabirds, brown pelicans may serve as a biomonitors. Organic contaminants were examined in brown pelican eggs collected from the Gulf of California in 2004 and South Carolina in 2005 using gas chromatography/mass spectrometry (GC/MS). Contaminants were compared using all individual data as well as statistically pooled samples to provide similar sample sizes with little difference in results. Principal components analysis separated the Gulf of California brown pelican eggs from the South Carolina eggs based on contaminant patterns. The South Carolina population had significantly (P&lt;0.05) higher levels of polychlorinated biphenyls (PCBs), chlordanes, dieldrin and mirex, while the Gulf of California eggs had higher levels of dichlorodiphenyltrichloroethanes (DDTs) and hexachlorocyclohexanes (HCHs). With the exception of dieldrin and brominated diphenyl ether (BDE) 47, this pattern was observed for mussel and oyster tissues from these regions, indicating the need for further study into the differences between east and west coast brown pelican populations and ecosystem contamination patterns. [Display omitted] ► This was the first known analysis of BDEs in the Gulf of California (GofCA). ► Brown pelicans in southeast U.S. (SC) and GofCA have different population trends. ► GofCA eggs had higher levels of lower brominated BDEs than SC; patterns also varied. ► PCBs, chlordanes, dieldrin and mirex were greater in SC eggs; DDTs and HCHs were lower.</description><identifier>ISSN: 0048-9697</identifier><identifier>EISSN: 1879-1026</identifier><identifier>DOI: 10.1016/j.scitotenv.2012.08.055</identifier><identifier>PMID: 23037812</identifier><identifier>CODEN: STENDL</identifier><language>eng</language><publisher>Kidlington: Elsevier B.V</publisher><subject>Analysis of Variance ; Animal, plant and microbial ecology ; Animals ; Applied ecology ; Biological and medical sciences ; Biomonitor ; Birds ; Brown pelican ; Chlordan - analysis ; chlordane ; Coastal environments ; coasts ; Contaminants ; DDT (pesticide) ; DDT - analysis ; Dieldrin ; Dieldrin - analysis ; ecosystems ; Ecotoxicology, biological effects of pollution ; Egg ; Eggs ; Environmental Monitoring - methods ; Environmental Monitoring - statistics &amp; numerical data ; Environmental Pollutants - analysis ; ethers ; Flame retardant ; Fundamental and applied biological sciences. 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With the exception of dieldrin and brominated diphenyl ether (BDE) 47, this pattern was observed for mussel and oyster tissues from these regions, indicating the need for further study into the differences between east and west coast brown pelican populations and ecosystem contamination patterns. [Display omitted] ► This was the first known analysis of BDEs in the Gulf of California (GofCA). ► Brown pelicans in southeast U.S. (SC) and GofCA have different population trends. ► GofCA eggs had higher levels of lower brominated BDEs than SC; patterns also varied. ► PCBs, chlordanes, dieldrin and mirex were greater in SC eggs; DDTs and HCHs were lower.</description><subject>Analysis of Variance</subject><subject>Animal, plant and microbial ecology</subject><subject>Animals</subject><subject>Applied ecology</subject><subject>Biological and medical sciences</subject><subject>Biomonitor</subject><subject>Birds</subject><subject>Brown pelican</subject><subject>Chlordan - analysis</subject><subject>chlordane</subject><subject>Coastal environments</subject><subject>coasts</subject><subject>Contaminants</subject><subject>DDT (pesticide)</subject><subject>DDT - analysis</subject><subject>Dieldrin</subject><subject>Dieldrin - analysis</subject><subject>ecosystems</subject><subject>Ecotoxicology, biological effects of pollution</subject><subject>Egg</subject><subject>Eggs</subject><subject>Environmental Monitoring - methods</subject><subject>Environmental Monitoring - statistics &amp; numerical data</subject><subject>Environmental Pollutants - analysis</subject><subject>ethers</subject><subject>Flame retardant</subject><subject>Fundamental and applied biological sciences. 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subjects Analysis of Variance
Animal, plant and microbial ecology
Animals
Applied ecology
Biological and medical sciences
Biomonitor
Birds
Brown pelican
Chlordan - analysis
chlordane
Coastal environments
coasts
Contaminants
DDT (pesticide)
DDT - analysis
Dieldrin
Dieldrin - analysis
ecosystems
Ecotoxicology, biological effects of pollution
Egg
Eggs
Environmental Monitoring - methods
Environmental Monitoring - statistics & numerical data
Environmental Pollutants - analysis
ethers
Flame retardant
Fundamental and applied biological sciences. Psychology
gas chromatography
Gas Chromatography-Mass Spectrometry
General aspects
Gulfs
Limit of Detection
Lindane - analysis
Marine
mass spectrometry
Mexico
mirex
Mirex - analysis
mortality
Multivariate Analysis
mussels
Oceans and Seas
Ovum - chemistry
oysters
Pelecanus
Pelecanus occidentalis
Pesticide
Polychlorinated biphenyl
polychlorinated biphenyls
Polychlorinated Biphenyls - analysis
Principal Component Analysis
Samples
seabirds
South Carolina
Statistical analysis
Statistical methods
title East versus West: Organic contaminant differences in brown pelican (Pelecanus occidentalis) eggs from South Carolina, USA and the Gulf of California, Mexico
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