کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10879812 | 1076769 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of ammonium on the activity and community of methanotrophs in landfill biocover soils
ترجمه فارسی عنوان
اثر آمونیم بر فعالیت و جامعه متانوتروف ها در خاک های زیست محیطی دفن زباله
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی
The influence of NH4+ on microbial CH4 oxidation is still poorly understood in landfill cover soils. In this study, effects of NH4+ addition on the activity and community structure of methanotrophs were investigated in waste biocover soil (WBS) treated by a series of NH4+-N contents (0, 100, 300, 600 and 1200 mg kgâ1). The results showed that the addition of NH4+-N ranging from 100 to 300 mg kgâ1 could stimulate CH4 oxidation in the WBS samples at the first stage of activity, while the addition of an NH4+-N content of 600 mg kgâ1 had an inhibitory effect on CH4 oxidation in the first 4 days. The decrease of CH4 oxidation rate observed in the last stage of activity could be caused by nitrogen limitation and/or exopolymeric substance accumulation. Type I methanotrophs Methylocaldum and Methylobacter, and type II methanotrophs (Methylocystis and Methylosinus) were abundant in the WBS samples. Of these, Methylocaldum was the main methanotroph in the original WBS. With incubation, a higher abundance of Methylobacter was observed in the treatments with NH4+-N contents greater than 300 mg kgâ1, which suggested that NH4+-N addition might lead to the dominance of Methylobacter in the WBS samples. Compared to type I methanotrophs, the abundance of type II methanotrophs Methylocystis and/or Methylosinus was lower in the original WBS sample. An increase in the abundance of Methylocystis and/or Methylosinus occurred in the last stage of activity, and was likely due to a nitrogen limitation condition. Redundancy analysis showed that NH4+-N and the C/N ratio had a significant influence on the methanotrophic community in the WBS sample.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Systematic and Applied Microbiology - Volume 37, Issue 4, June 2014, Pages 296-304
Journal: Systematic and Applied Microbiology - Volume 37, Issue 4, June 2014, Pages 296-304
نویسندگان
Xuan Zhang, Jiao-Yan Kong, Fang-Fang Xia, Yao Su, Ruo He,