Problems Related to Lichen Transplants to Monitor Trace Element Deposition in Repeated Surveys: A Case Study from Central Italy |
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| Authors: | Luisa?Frati Giorgio?Brunialti Email author" target="_blank">Stefano?LoppiEmail author |
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| Institution: | (1) Dipartimento di Scienze Ambientali “G. Sarfatti”, Università di Siena, Via P.A. Mattioli 4, I-53100 Siena, Italy |
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| Abstract: | The results of a transplant experiment with the fruticose lichen Evernia prunastri aimed at monitoring the trends of trace elements deposition in a repeated biomonitoring study are reported. Data comparability
between the two surveys and interpretation of the results were addressed in this study. The ratio between the concentration
of each element after the exposure and in control samples prior to exposure (exposed-to-control ratio, EC ratio), as well
as an appropriate interpretative scale, were adopted as a means of determining the temporal trends of element accumulation
by lichen transplants. The results showed that the method adopted is indeed a reliable tool, pinpointing a Zn smelting plant
and an oil refinery as principal pollution sources in the area, which indicate that elements associated with the former were
similarly accumulated in both 2002 and 2003, while elements associated with the latter tended to decrease in 2003. |
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| Keywords: | air pollution biomonitoring Evernia prunastri heavy metals |
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