Title of article :
Persistent organic pollutants (POP) in a benthic omnivore – A comparison between lake and stream crayfish populations Original Research Article
Author/Authors :
Niklas Holmqvist، نويسنده , , Patrik Stenroth، نويسنده , , Olof Berglund، نويسنده , , Per Nystr?m، نويسنده , , Wilhelm Graneli، نويسنده , , Per Larsson، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
9
From page :
1070
To page :
1078
Abstract :
We investigated the accumulation of PCB and DDT in crayfish populations in 10 streams in southern Sweden. The results were compared with an earlier study on crayfish in lakes from the same area. We found that the concentration of pollutants in crayfish did not differ between the two types of systems. Variation in body burden was higher in stream living crayfish probably because of the higher influence from pollutants deposited in the catchment area and the more dynamic transport in streams. In streams, p,p′-DDE concentrations were positively correlated to trophic status (total phosphorous) while PCB did not show any correlation with the nutrient regime. Further, mean ΣPCB and p,p′-DDE concentrations in crayfish did not correlate in streams. We suggest that the sources of the two pollutants differ for stream living crayfish. The results indicate that crayfish in streams are affected to a higher degree to pollutants in the catchment area and the precipitation regime. In lakes, internal processes govern uptake of pollutants in crayfish.
Keywords :
Streams , trophic status , stable isotopes , land use , Persistent Organic Pollutants , crayfish , lakes
Journal title :
Chemosphere
Serial Year :
2007
Journal title :
Chemosphere
Record number :
724618
Link To Document :
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