Posidonia as an indicator of mercury contamination |
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| Institution: | 2. Neurology Department, Hospital Egas Moniz—Centro Hospitalar de Lisboa Ocidental, Lisbon, Portugal;3. CEDOC, Nova Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Lisbon, Portugal;4. Neuroimaging Department, Hospital Egas Moniz—Centro Hospitalar de Lisboa Ocidental, Lisbon, Portugal;1. MARE – Marine and Environmental Sciences Centre, Laboratório Marítimo da Guia, Faculdade de Ciências da Universidade de Lisboa, Av. Nossa Senhora do Cabo, 939, 2750-374 Cascais, Portugal;2. MARE – Marine and Environmental Sciences Centre, Universidade de Coimbra, 3004-517 Coimbra, Portugal |
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| Abstract: | The mercury content in the marine phanerogam Posidonia oceanica, sampled in an area near a chloralkali complex, has been measured and compared with that of the samples collected in a non-impacted region.Plants growing in the seawater facing the chlor-alkali complex showed mercury content of 0.19 μg g−1 f.w., compared with 0.02 μg g−1 f.w. in the samples from the control area. Sediments of the industrial area have mercury levels 20–30 times higher than those from the control area. As the mercury concentration in seawater of both areas is comparable, the mercury content in the plant appears to be correlated with mercury levels in the sediment; probably the metal uptake in Posidonia oceanica takes place mainly through the root system. |
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