Questioning High Nitrogen Fixation Rate Measurements in the Southern Ocean
نویسندگان
چکیده
منابع مشابه
Equatorial upwelling enhances nitrogen fixation in the Atlantic Ocean
[1] Surface waters in upwelling regions are thought to be nutrient rich and hence inhibit nitrogen fixation (diazotrophy) because diazotrophs can preferentially assimilate nitrate and ammonia instead of expending energy to fix dinitrogen. We found average nitrogen fixation rates to be two to seven times higher in the surface waters of the upwelling region of the eastern equatorial Atlantic than...
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In temperate Atlantic waters (18.8 to 20.1°C), biological nitrogen fixation has been demonstrated by 2 independent measurements: N-N2 incorporation and nifH identification in the DNA and expressed messenger RNA (mRNA). At 2 stations in the western English Channel, bulk waters were incubated with N-N2. At the high levels of particulate nitrogen (≤11.5 μmol N l–1), absolute fixation rates of 18.9...
متن کاملExcess nitrate and nitrogen fixation in the North Atlantic Ocean
The process of nitrogen fixation in the subtropical North Atlantic has received considerable study over the last few decades. The findings have highlighted a large discrepancy in estimates for the locations and rates of nitrogen fixation when results from biological techniques are compared to geochemical techniques. Here, we evaluated the distribution and rates of excess nitrate development in ...
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ژورنال
عنوان ژورنال: Nature Geoscience
سال: 2022
ISSN: ['1752-0894', '1752-0908']
DOI: https://doi.org/10.1038/s41561-021-00873-3