Winner William E, Bewley J Derek, Krouse H Roy, Brown Hugh M
Biology Department, University of Calgary, T2N 1N4, Calgary, Alberta, Canada.
Physics Department, University of Calgary, T2N 1N4, Calgary, Alberta, Canada.
Oecologia. 1978 Jan;36(3):351-361. doi: 10.1007/BF00348061.
The δS value of SO emitted by natural gas refineries is about +25, which is higher than that for non-industrial sulfur sources in our study areas. Terrestrial mosses absorb SO from the atmosphere and have a δS value which is directly related to the degree of SO stress to which they are subjected. The δS values for conifer needles are lower than for mosses at the same collection site, which indicates that trees obtain sulfur from both atmospheric and soil sources.Potted conifers were transferred to sites differing in their degree of SO stress. This difference is reflected by the change of δS values of their needles. SO absorbant pot covers, such as charcoal and moss, reduce the amount of airborne sulfur which is available to tress. Moss also may reduce SO absorbed by soils in forest stands. We have used analysis of δS values to (1) help define SO dispersion patterns; (2) reveal the rates at which plants accumulate this pollutant; and (3) associate suspected SO injury more closely to an emission source.
天然气精炼厂排放的二氧化硫的δS值约为+25，高于我们研究区域内非工业硫源的δS值。陆生苔藓从大气中吸收二氧化硫，其δS值与它们所遭受的二氧化硫胁迫程度直接相关。在同一采集地点，针叶树针叶的δS值低于苔藓，这表明树木从大气和土壤两种来源获取硫。将盆栽针叶树转移到二氧化硫胁迫程度不同的地点。这种差异通过其针叶δS值的变化得以体现。诸如木炭和苔藓之类的二氧化硫吸收性盆盖，减少了树木可获取的空气中的硫含量。苔藓还可能减少森林中土壤吸收的二氧化硫。我们利用δS值分析来：（1）帮助确定二氧化硫的扩散模式；（2）揭示植物积累这种污染物的速率；以及（3）将疑似二氧化硫伤害与排放源更紧密地联系起来。
