Copper, nickel and lead in lichen and tree bark transplants over different periods of time

This work aimed at comparing the dynamics of atmospheric metal accumulation by the lichen Flavoparmelia caperata and bark of Platanus hybrida over different periods of time. Transplants were exposed in three Portuguese coastal cities. Samples were retrieved (1) every 2 months (discontinuous exposure...

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Bibliographic Details
Published in:Environmental pollution (1987) 2008, Vol.151 (2), p.408-413
Main Authors: Baptista, Mafalda S., Vasconcelos, M. Teresa S.D., Cabral, João Paulo, Freitas, M. Carmo, Pacheco, Adriano M.G.
Format: Article
Language:English
Subjects:
Air Pollutants - analysis
air pollution
air quality
Analysis methods
Applied sciences
Atmospheric deposition
Atmospheric pollution
bark
bioaccumulation
Biomonitoring
cadmium
Cities
climatic factors
Copper - analysis
environmental monitoring
Environmental Monitoring - methods
Exact sciences and technology
Flavoparmelia caperata
heavy metals
indicator species
lead
Lead - analysis
lichens
Lichens - chemistry
longitudinal studies
Metals, Heavy - analysis
nickel
Nickel - analysis
Pinus
Plant Bark - chemistry
plant biochemistry
plant tissues
Platanus
Platanus hybrida
pollutants
Pollution
Portugal
species differences
Time
Trace metals
trees
uptake mechanisms
validity
Weather
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Summary:This work aimed at comparing the dynamics of atmospheric metal accumulation by the lichen Flavoparmelia caperata and bark of Platanus hybrida over different periods of time. Transplants were exposed in three Portuguese coastal cities. Samples were retrieved (1) every 2 months (discontinuous exposure), or (2) after 2-, 4-, 6-, 8- and 10-month periods (continuous exposure), and analysed for Cu, Ni and Pb. Airborne accumulation of metals was essentially independent of climatic factors. For both biomonitors [Pb] > [Ni] > [Cu] but Pb was the only element for which a consistent pattern of accumulation was observed, with the bark outperforming the lichen. The longest exposure periods hardly ever corresponded to the highest accumulation. This might have been partly because the biomonitors bound and released metals throughout the exposure, each with its own dynamics of accumulation, but both according to the environmental metal availability. Lichen and tree bark have distinct dynamics of airborne metal accumulation.
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2007.06.004