Baptista Mafalda S, Vasconcelos M Teresa S D, Cabral João Paulo, Freitas M Carmo, Pacheco Adriano M G
CIIMAR, Rua dos Bragas, Porto, Portugal.
Environ Pollut. 2008 Jan;151(2):408-13. doi: 10.1016/j.envpol.2007.06.004. Epub 2007 Jul 16.
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.
这项工作旨在比较不同时间段内地衣黄卷蛾和杂交悬铃木树皮对大气金属的累积动态。移植样本暴露于葡萄牙的三个沿海城市。样本（1）每两个月采集一次（间断暴露），或（2）在2个月、4个月、6个月、8个月和10个月后采集（连续暴露），并分析其中铜、镍和铅的含量。大气中金属的累积基本不受气候因素影响。对于两种生物监测器而言，[铅]>[镍]>[铜]，但铅是唯一观察到一致累积模式的元素，树皮的累积效果优于地衣。最长的暴露期几乎从未对应最高的累积量。这可能部分是因为生物监测器在整个暴露过程中会结合并释放金属，各自具有独特的累积动态，但两者均取决于环境中金属的可利用性。
