Malaspina Paola, Tixi Sara, Brunialti Giorgio, Frati Luisa, Paoli Luca, Giordani Paolo, Modenesi Paolo, Loppi Stefano
Botanic Centre Hanbury, DISTAV, University of Genoa, Corso Dogali 1 M, 16136, Genova, Italy,
Environ Sci Pollut Res Int. 2014 Nov;21(22):12836-42. doi: 10.1007/s11356-014-3222-z. Epub 2014 Jun 28.
We investigated the bioaccumulation of selected trace elements in samples of the lichen Evernia prunastri (L.) Ach. transplanted across two seasons in the urban area of Genoa (NW Italy), which is heavily affected by traffic and industrial pollution. Total concentration of most elements did not exhibit differences between seasons, exceptions being Al and Na, higher in summer, and As, Cd, and Ti, higher in winter. Differences emerged in the initial concentrations of some elements in control samples, and this was accounted for by the use of exposed-to-control (EC) ratios, which allowed interpretation of changes in element concentrations. The study area resulted highly polluted, likely by particulate matter, as suggested also by the higher concentrations of airborne PM10 during winter months. Bioaccumulation of particulate matter seems to be affected by differences in rainfall regimes across seasons, since element solubilization and leaching due to precipitation may vary considerably.
我们研究了在意大利西北部热那亚市区跨两个季节移植的地衣扁枝衣（Evernia prunastri (L.) Ach.）样本中选定微量元素的生物累积情况。该市区受交通和工业污染严重影响。大多数元素的总浓度在不同季节间未表现出差异，例外的是铝和钠，夏季含量较高，而砷、镉和钛则在冬季含量较高。对照样本中某些元素的初始浓度出现了差异，这通过使用暴露与对照（EC）比率得以解释，该比率有助于解读元素浓度的变化。研究区域污染程度很高，可能是受到颗粒物污染，冬季空气中PM10浓度较高也表明了这一点。颗粒物的生物累积似乎受到不同季节降雨模式差异的影响，因为降水导致的元素溶解和淋溶可能有很大变化。
