Influence of trophic position on organochlorine concentrations and compositional patterns in a marine food web

被引:0
作者
Ruus, A
Ugland, KI
Skaare, JU
机构
[1] Univ Oslo, Inst Biol, Dept Marine Zool & Marine Chem, N-0316 Oslo, Norway
[2] Natl Vet Inst, N-0033 Oslo, Norway
关键词
food web; organochlorines; stable isotopes; oslofjord; harbor seal;
D O I
10.1897/1551-5028(2002)021<2356:IOTPOO>2.0.CO;2
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The accumulation of polychlorinated biphenyls (PCBs), DDTs (p,p'-DDT [1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane], o,p'-DDT [1,1,1-trichloro-2-(2-chlorophenyl)-2-(4-chlorophenyl)ethane],p,p'-DDD [1,1-dichloro-2,2-bis(4-chlorophenyl)ethane], o,p'-DDD [1,1-dichloro-2-(2-chlorophenyl)-2-(4-chlorophenyl)ethane], and p,p'-DDE [1,1-dichloro-2,2-bis(4-chlorophenyl)ethene]), chlordanes (traps-chlordane, cis-chlordane, traps-nonachlor, cis-nonachlor and oxychlordane), hexachlorocyclohexanes (alpha-, beta-, and gamma-isomers), hexachlorobenzene, and mirex was investigated in a marine food web from southeastern Norway. The food web consisted of the polychaete Nereis diversicolor, lesser sandeel (Ammodytes tobianus), three species of gobys (Gobiusculus flavescens, Pomatoschistus sp., and Gobius niger), bullrout (Myoxocephalus scorpius), cod (Gadus morhua). herring gull (Larus argentatus), and harbor seal (Phoca vitulina). The results show that interspecies differences in organochlorine (OC) compositional patterns in the food web depend on several factors (allometric, biochemical, physical, and physicochemical) specific to both the chemicals and the organisms. The importance of dietary accumulation and metabolic capacity increases toward higher trophic levels, while the OC patterns are to a larger extent determined by the lipophilicity and water solubility of the compounds at lower trophic levels. Furthermore, stable nitrogen isotopes provided a continuous measure of trophic position, rendering us capable of quantifying the increases in the concentrations of SigmaPCB, Sigmadichorodiphenyltrichloroethane (DDT), and Sigmachlordane (CHL) and the percentages of highly chlorinated PCBs through the food web. The information provided may be important for future modeling of the fate of organochlorine contaminants in marine food webs.
引用
收藏
页码:2356 / 2364
页数:9
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