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Details van artikel 11 van 78 gevonden artikelen
| Titel: |
An Assessment of Mirex Concentrations along the Southern Shorelines of the Great Lakes, USA |
| Auteur: |
Dennis A. Apeti Gunnar G. Lauenstein |
| Verschenen in: |
American journal of environmental sciences |
| Paginering: | Jaargang 2 (2006) nr. 3 pagina's 95-103 |
| Jaar: |
2006 |
| Inhoud: |
Mirex is a persistent and toxic polychlorinated pesticide that has compromisedenvironmental quality in the Great Lakes region since the 1960s. As a bioaccumulative andcarcinogenic compound, mirex at its current levels in Lake Ontario is a concern because of thepotential for trophic level transfer and biomagnification in top predators. As a part of the NOAA’sNational Status and Trends Program (NS&T), zebra mussels and surficial sediments were surveyedthroughout the Great Lakes since 1992 to monitor a broad suite of contaminants, including mirex. Thenon-parametric Wilcoxon test revealed that Lake Ontario consistently had the highest mirexconcentrations (p < 0.0054) followed by Lake Erie while Lakes Huron and Michigan had the lowestconcentrations. Current concentrations of mirex at Lake Ontario sites are at or above the NS&Tbenchmark of 85 th percentile (2.33 ng g 1 dry weights) determined among all sites in the Great Lakes.The Spearman correlation statistic revealed an overall decreasing trend in tissue concentration, but thisdecline is only significant in Lake Ontario (p< 0.02) over the monitoring period 1992-2004.Photodegradation, volatilization, fishing and loss via the St Lawrence River are discussed asmechanisms resulting in the mirex decline. |
| Uitgever: |
Science Publications (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 11 van 78 gevonden artikelen
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