Procambarus clarkii as a bioindicator of heavy metal pollution sources in the lower Ebro River and Delta.
In the Ebro River basin, point and diffuse pollution of heavy metals stems mainly from industry and agriculture. Bioaccumulation patterns were examined under different pollution sources (point and diffuse) using levels of heavy metals (As, Cd, Cr, Cu, Hg, Pb and Zn) in abdominal muscle tissue of Procambarus clarkii. P. clarkii captured under point source effects presented the highest concentrations of Hg, Pb and As; and were related with distance to the source of industrial waste sediments. Mean Hg levels in crayfish exposed to point sources of metals significantly exceeded legal allowed values established by the European Union legislation. In the Ebro Delta, high levels of As, Cr, Cu and Zn were associated with traditional agriculture activity (diffuse pollution) as well. These results demonstrate the potential of P. clarkii to bioaccumulate heavy metals from both point and diffuse sources and hence potentially transfer these metals to higher trophic levels.
Suárez-Serrano
Andrea
A
Aquatic Ecosystems, IRTA, E-43540 Sant Carles de la Ràpita, Tarragona, Catalonia, Spain. andrea.suarez@irta.cat
Alcaraz
Carles
C
Ibáñez
Carles
C
Trobajo
Rosa
R
Barata
Carlos
C
D000818:Animals; D003400:Astacoidea / Q000737:chemistry / Q000187:drug effects / Q000378:metabolism*; D004784:Environmental Monitoring / Q000379:methods*; D005062:European Union; D019015:Geologic Sediments / Q000737:chemistry; D007220:Industrial Waste; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity; D018482:Muscle, Skeletal / Q000737:chemistry / Q000187:drug effects / Q000378:metabolism; D045483:Rivers / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity
D007220:Industrial Waste; D019216:Metals, Heavy; D014874:Water Pollutants, Chemical