施肥对盐沼细菌群落的改变。
Alteration of a salt marsh bacterial community by fertilization with sewage sludge.
机构信息
Department of Biology, Swarthmore College, Swarthmore, Pennsylvania 19081, and Marine Biological Laboratory, Woods Hole, Massachusetts 02543.
出版信息
Appl Environ Microbiol. 1986 Oct;52(4):915-23. doi: 10.1128/aem.52.4.915-923.1986.
The effects of long-term fertilization with sewage sludge on the aerobic, chemoheterotrophic portion of a salt marsh bacterial community were examined. The study site in the Great Sippewissett Marsh, Cape Cod, Mass., consisted of experimental plots that were treated with different amounts of commercial sewage sludge fertilizer or with urea and phosphate. The number of CFUs, percentage of mercury- and cadmium-resistant bacteria, and percentage of antibiotic-resistant bacteria were all increased in the sludge-fertilized plots. Preliminary taxonomic characterization showed that sludge fertilization markedly altered the taxonomic distribution and reduced diversity within both the total heterotrophic and the mercury-resistant communities. In control plots, the total heterotrophic community was fairly evenly distributed among taxa and the mercury-resistant community was dominated by Pseudomonas spp. In sludge-fertilized plots, both the total and mercury-resistant communities were dominated by a single Cytophaga sp.
研究了长期施用污水污泥对高盐分沼泽湿地细菌群落好氧异养部分的影响。该研究地点位于马萨诸塞州鳕鱼角的大锡皮威塞特沼泽，由不同数量的商业污水污泥肥料或尿素和磷酸盐处理的实验区组成。在污泥施肥区，CFU 数量、抗汞和镉细菌的百分比以及抗生素抗性细菌的百分比均增加。初步分类特征表明，污泥施肥明显改变了分类分布，并降低了总异养和抗汞群落内的多样性。在对照区，总异养群落的分类分布相当均匀，而抗汞群落则以假单胞菌属为主。在污泥施肥区，总异养和抗汞群落均以单个噬纤维菌属为主。
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