Decade-long monitoring reveals a transient distortion of baseline butyltin bioaccumulation pattern in gastropods |
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| Authors: | JM Ruiz J Díaz L Couceiro R Barreiro |
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| Institution: | a Dpto. BA, BV y Ecología, Universidade da Coruña, Alejandro da Sota 1, 15008 Coruña, Spain
b Dpto. Ingeniería Química y Química Inorgánica, Universidad de Cantabria, Avda. de los Castros s/n, 39005 Santander, Spain |
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| Abstract: | Worldwide measures to restrict tributyltin (TBT) in antifouling paints have been legislated for decades, and were upgraded to a total ban on September 2008. With a view to test the response of coastal biota to changing pollution, since 1996 we have determined the concentration of TBT and derivatives di- and mono-butyltin (DBT and MBT) in NW Spain populations of two gastropods of contrasting biology, the rock-snail Nucella lapillus (n = 18) and the mud-snail Nassarius reticulatus (n = 24). TBT pollution in the study area has decreased consistently and considerably over time. In addition, the baseline butyltin (BT) bioaccumulation patterns showed a marked but transient distortion. These field observations are consistent with BT desorption from sediments, a natural phenomenon that is now to be expected in developing countries recently subject to the global TBT ban. |
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| Keywords: | Biomonitoring Butyltin Gastropods Nassarius reticulatus Nucella lapillus TBT |
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