Tilia sp. - Urban Trees for Future
Tilia spp. (lime trees) as ornamental trees have a privileged place in the European mythology and traditions and this is a reason of their constant presence in the urban landscape. Lime trees are in general very resistant to biotic and abiotic stress, although some sanitary problems may occur (e.g. aphids and other related organisms). Tilia spp. are considered a good bioindicator and accumulator of heavy metals. Seasonal accumulations of Pb, Ni, Cr, Mn, Cu and Fe in leaves of Tilia spp. in urban and periurban green areas of Western Romania, under different traffic conditions, were analyzed using atomic absorption spectrophotometry. The results confirmed the direct correlation between the traffic intensity and the accumulation of Pb in leaves. By mitigating the effects of air pollution, especially in terms of heavy metals, Tilia spp. should be further promoted as urban trees.
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