کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5751289 1619701 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stimulation of long-term ammonium nitrogen deposition on methanogenesis by Methanocellaceae in a coastal wetland
ترجمه فارسی عنوان
تحریک رسوب نیتروژن آمونیاک در متانوژنز توسط متانوکلیس در یک تالاب ساحلی
کلمات کلیدی
رسوب نیتروژن اتمی، آمونیاک و نیترات نیتروژن، شار متان، متان ژن ها، جایگزین خشک و مرطوب تالاب ساحلی،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- The deposition of both ammonium and nitrate nitrogen on methane emission was tested.
- Deposition of ammonium nitrogen accelerated methane emissions all year round.
- Ammonium nitrogen converted Yellow River Delta to a CH4 source during the dry season.
- Methanocellaceae increased in abundance in response to ammonium nitrogen deposition.
- Nitrate nitrogen deposition did not affect methane flux significantly.

Atmospheric nitrogen deposition caused by human activities has been receiving much attention. Here, after long-term simulated ammonium and nitrate nitrogen deposition (NH4Cl, KNO3, and NH4NO3) in the Yellow River Delta (YRD), a sensitive coastal wetland ecosystem typified by a distinct wet and dry season, methane fluxes were measured, by adopting a closed static chamber technique. The results showed that deposition of ammonium nitrogen accelerated methane emissions all year round. Ammonium nitrogen deposition transformed the YRD from a methane sink into a source during the dry season. Methanocellaceae is the only methanogen with increased abundance after the application of NH4Cl and NH4NO3, which promoted methane emissions, during the wet season. The findings suggested that Methanocellaceae may facilitate methane emissions in response to increased ammonium nitrogen deposition. Other methanogens might have profited from ammonium supplementation, such as Methanosarcinaceae. Deposition of nitrate nitrogen did not affect methane flux significantly. To the best of our knowledge, this study is the first to show that Methanocellaceae may be responsible for methane production in coastal wetland system. This study highlights the significant effect of ammonium nitrogen and slight effect of nitrate nitrogen on methane emission in the YRD and it will be helpful to understand the microbial mechanism responding to increased nitrogen deposition in the sensitive coastal wetland ecosystem.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 595, 1 October 2017, Pages 337-343
نویسندگان
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