کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5765196 1626613 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Assessing N2 fixation in estuarine mangrove soils
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
Assessing N2 fixation in estuarine mangrove soils
چکیده انگلیسی


- We measured the magnitude of nitrogenase activity (NA) of mangrove soils.
- The NA was affected by the available soil C but not salinity.
- The diazotrophs in these mangrove soils were mostly heterotrophs.
- More than 51% of the NA was attributed by sulfate-reducing bacteria.
- The NA was attributed by the microbial activity rather than their cell reproduction.

Nitrogen (N) limited mangrove forest may have a high potential for microbial N2 fixation. Previous research has focused on soil nitrogenase activity in pristine mangrove forests with little anthropogenic impact. This research was designed to evaluate the magnitude of nitrogenase activity of mangrove soils in a high anthropogenic N-loading environment and the way in which soil N2 fixation in mangrove forest may be related to organic carbon and salinity. The test involved an acetylene reduction method under controlled laboratory conditions. The mangrove forests with high anthropogenic N loading may have high nitrogenase activity in the soils. The diazotrophs in these mangrove soils were mostly heterotrophs and the sulfate-reducing bacteria were the major N2-fixing bacteria. The nitrogenase activity was little affected by the soil salinity, which suggests that these groups of N2 fixation bacteria adapted well to saline conditions in the estuary.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Estuarine, Coastal and Shelf Science - Volume 189, 5 April 2017, Pages 84-89
نویسندگان
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