Polychlorinated Biphenyls In Aquatic Invertebrates And Fish And Observations About Nitrogen And Carbon Isotope Composition In Relation To Trophic Structure And Bioaccumulation Patterns Lake Worth And Meandering Road Creek Fort Worth Texas 2007 08
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Author | : James Bruce Moring |
Publisher | : |
Total Pages | : 29 |
Release | : 2010 |
Genre | : Aquatic invertebrates |
ISBN | : |
Author | : Ronald Eisler |
Publisher | : |
Total Pages | : 86 |
Release | : 1986 |
Genre | : Environmental chemistry |
ISBN | : |
Author | : Richard E. Besse |
Publisher | : |
Total Pages | : 48 |
Release | : 2005 |
Genre | : Government publications |
ISBN | : |
Author | : Columbia National Fisheries Research Laboratory (U.S.). |
Publisher | : |
Total Pages | : 84 |
Release | : 1978 |
Genre | : Biphenyl compounds |
ISBN | : |
Author | : Christopher L. Braun |
Publisher | : |
Total Pages | : 64 |
Release | : 2008 |
Genre | : Polychlorinated biphenyls |
ISBN | : |
Author | : Megan Archer |
Publisher | : |
Total Pages | : 158 |
Release | : 2015 |
Genre | : Aquatic ecology |
ISBN | : |
Estimating the risk of polychlorinated biphenyls (PCBs) in aquatic systems requires evaluation of exposure, usually based on exhaustive chemical extraction of sediment and potentially exposed organisms and an assessment of toxicity. Remediation can then focus on areas where the exposure leads to the highest risk. Although effective, an approach that estimates exposure, which accounts for bioavailabilty, bioaccumulation, trophic transfer potential, and transport of materials within and out of the waterway, should serve as a more comprehensive environmental assessment. The current study examined exposure of PCBs in several different trophic levels within the Campus Lake ecosystem, Carbondale, Illinois. The source of contamination and the distribution of PCBs among ecosystem components demonstrated contamination within the aquatic portion of Campus Lake and transport out of the aquatic environment to the riparian area. Several media were collected including sediment, emergent insects, spiders, and three species of fish. Sediment extractions demonstrated that PCBs were localized to one small cove and this area served as the source for transfer of PCBs to both aquatic and terrestrial organisms. Single-point 24-h Tenax extractions formed the basis for evaluating the bioavailable component of the sediment-associated PCBs with strong correlations to laboratory-based bioaccumulation assays for oligochaetes and chironomid larvae. Stable isotope data suggested that the source of carbon to the food web was relatively constant. Food web samples of emerging insects, fish, and spiders revealed that the PCBs in Campus Lake were bioavailable and the pattern of the PCB signature among food web components followed typical food web processes. The PCB congener pattern was consistent between emergent midges and spiders demonstrating the transfer of PCBs from aquatic to terrestrial species. The PCB concentrations detected in emerging insects from the contaminated area were on average 25 times greater than those detected in emerging insects from reference sites outside the area of greatest sediment contamination. High PCB concentrations found in several species of fish suggested that despite the localized sediment contamination, fish throughout the lake were exposed. These levels also exceeded the fish consumption advisory criteria. The PCB pattern comparisons suggested that the contaminated sediment was the source of exposure throughout the food web. This approach identified the scope of exposure to organisms, demonstrated bioavailability, and provided a basis for future PCB remediation and subsequent monitoring of Campus Lake. In comparison to studies focused solely on limited sampling of fish for consumption advisory purposes, this approach demonstrated the importance of more comprehensive studies to examine the range of ecosystem exposure even from very limited contamination sources.
Author | : Patuxent Wildlife Research Center |
Publisher | : Palala Press |
Total Pages | : 84 |
Release | : 2018-02-20 |
Genre | : History |
ISBN | : 9781378147092 |
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author | : Christopher L. Braun |
Publisher | : Geological Survey (USGS) |
Total Pages | : 20 |
Release | : 2010-01-01 |
Genre | : Polychlorinated biphenyls |
ISBN | : 9781411328402 |
Author | : R. N. Dexter |
Publisher | : |
Total Pages | : 88 |
Release | : 1978 |
Genre | : Organochlorine compounds |
ISBN | : |
Author | : Dwayne R. J. Moore |
Publisher | : |
Total Pages | : 76 |
Release | : 1991 |
Genre | : Estuarine pollution |
ISBN | : |
"A literature review was conducted on the physical and chemical properties of polychlorinated biphenyls (PCBS), their concentrations in the marine environment, their fate and persistence, their bioaccumulation, and their toxicity to marine biota. The information is summarized in this publication. From it, a Canadian water quality guideline is developed for PCBs to ensure the protection and maintenance of marine aquatic biota"--Abstract.