Thompson I P, Blackwood I L, Davies T D
School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, Great Britain.
Environ Pollut. 1987;43(2):143-54. doi: 10.1016/0269-7491(87)90072-8.
The effect of polluted snow melt waters on the number of soil bacteria was determined using soil cores extracted from an upland catchment in the Cairngorm Mountains, Scotland. Total numbers of viable heterotrophic bacteria and bacterial denitrifiers were determined using plate and MPN counts. Separate soil cores were treated with simulated melt waters representative of either the composition of the first melt fraction from polluted or leached snowpacks. The number of bacteria in the Ah soil horizon (Hodgson, 1974) treated with polluted snow melt (PSM) water decreased significantly by 28-fold, but increased by 11-fold in the BC horizon. Denitrifier numbers decreased by 8-fold in the Ah horizon, but increased by over 2-fold lower down the profile. Overall the bacterial community exposed to simulated leached snow melt (LSM) waters showed little change in the Ah horizon. In the BC horizon (Hodgson, 1974), total viable bacterial numbers decreased by 20-fold, but denitrifiers numbers were unaffected.
利用从苏格兰凯恩戈姆山脉一个高地集水区提取的土芯，测定了受污染的融雪水对土壤细菌数量的影响。使用平板计数法和最大可能数法（MPN）测定了可培养异养细菌和细菌反硝化菌的总数。分别用模拟融雪水对土芯进行处理，模拟融雪水分别代表受污染或淋溶雪堆的首批融水成分。用受污染的融雪水（PSM）处理的A层土壤（霍奇森，1974）中的细菌数量显著减少了28倍，但在BC层中增加了11倍。A层中的反硝化菌数量减少了8倍，但在剖面下部增加了2倍多。总体而言，暴露于模拟淋溶融雪水（LSM）的细菌群落，在A层变化不大。在BC层（霍奇森，1974），可培养细菌总数减少了20倍，但反硝化菌数量未受影响。
