Garty J, Kloog N, Cohen Y, Wolfson R, Karnieli A
Department of Botany, George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel.
Environ Res. 1997;74(2):174-87. doi: 10.1006/enrs.1997.3727.
The following study was designed to determine the environmental impact of pollutants emitted by combustion of heavy fuel oil in Ashdod, in Southwestern Israel. For this purpose we measured concentrations of total S, V, and Ni in the local epiphytic fruticose lichen Ramalina duriaei, which grows in the peripheral region of the town, and compared these results with those obtained in thalli collected 100 km away, in the HaZorea Forest, northeastern Israel. We also transplanted thalli from the HaZorea Forest to the Ashdod region for a 10-month period. At the end of the experiment we measured the elemental content in all samples. In addition we measured chlorophyll degradation expressed as changes in the 435 nm/415 nm OD ratio, and changes in the spectral responses of the thalli. In several sites in the Ashdod region we found high concentrations of S, V, and Ni in transplanted thalli, which correlated with the NDVI values. These findings agree with other measurements of SO2 and V in the Ashdod area. We suggest that a high V/Ni ratio in lichens is a tracer for air pollution caused by the combustion of heavy fuel oil.
以下研究旨在确定以色列西南部阿什杜德重质燃料油燃烧排放污染物对环境的影响。为此，我们测量了生长在该镇周边地区的当地附生枝状地衣硬叶树花松萝中总硫、钒和镍的浓度，并将这些结果与在以色列东北部哈佐雷亚森林100公里外采集的叶状体中获得的结果进行比较。我们还将哈佐雷亚森林的叶状体移植到阿什杜德地区，为期10个月。在实验结束时，我们测量了所有样品中的元素含量。此外，我们测量了以435nm/415nm OD比值变化表示的叶绿素降解以及叶状体光谱响应的变化。在阿什杜德地区的几个地点，我们发现移植的叶状体中硫、钒和镍的浓度很高，这与归一化植被指数（NDVI）值相关。这些发现与阿什杜德地区二氧化硫和钒的其他测量结果一致。我们认为地衣中高钒/镍比值是重质燃料油燃烧造成空气污染的一个指标。
