太湖部分区域沉积物中磷化氢和微生物的分布

测定了太湖柱状沉积物中磷化氢和表层沉积物中微生物,分析了表层沉积物中磷化氢和各种代表性微生物的相关性.结果表明,磷化氢在太湖柱状沉积物中普遍存在,其浓度范围为0.15～36.1 ng/kg,磷化氢的含量随沉积物取样深度和点位的不同而变化.表层沉积物中的代表性微生物在不同点位的分布差异较大,微生物的数量和分布与沉积物污染程度、营养盐状况有关.表层沉积物中磷化氢与微生物(好氧细菌、厌氧细菌、放线菌、有机磷细菌和无机磷细菌)的相关性分析表明磷化氢与无机磷细菌呈显著正相关(R²=0.817,n=6),而与有机磷细菌则没有明显的相关性(R²=0.008,n=6).

Distribution of Phosphine and Microorganisms in Partial Sediments of Lake Taihu

Phosphine in Lake Taihu sediment cores were monitored by a GC/NPD method,coupled with cryo-trapping enrichment technology.Results show that phosphine is universally detected in sediment cores,its concentration ranges from 0.15ng/kg to 36.1 ng/kg.The concentration of phosphine varies with different sampling sites and depths.Representative microorganisms(aerobic bacteria,anaerobic bacteria,actinomycete,inorganic phosphobacteria and organic phosphobacteria) in surface sediments were also identified.The amount and distribution of microorganisms positively correlate with different contamination and salty levels of the samples.A markedly positive linear correlation between the concentration of phosphine and the numbers of inorganic phosphobacteria could be observed(R²=(0.817,) n=6).There is not a correlation between phosphine level and organic phosphobacteria quantities.