An assessment of nitrogen fixation as a source of nitrogen to the North Atlantic Ocean
An assessment of nitrogen fixation as a source of nitrogen to the North Atlantic Ocean
复制标题
对北大西洋氮源固氮的评估
DOI：
10.1007/978-94-009-1776-7_8
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发表时间：
1996
期刊：
影响因子：
4
通讯作者：
N. Owens
中科院分区：
文献类型：
--
作者：
F. Lipschultz;N. Owens
重新评估了北大西洋盆地氮循环中固氮的作用，因为最近的估计表明固氮率远高于以前的报告。对主要固氮生物Trichodesmium 的固氮速率和丰度的现有数据进行检查，得出固氮速率可能高达 1.09 × 1012mol N yr-1 的结论。回顾了几个地球化学论点，每个论点都需要与固氮一致的大型氮源，但当前数据虽然有限，但不支持足够高的速率。然而，最近对每个菌落固定率的测量高于历史平均值，这表明改进的方法可能需要通过进一步的测量进行重新评估。热带大西洋主要区域的铁固定率和丰度的时间解析数据的缺乏是另一个主要差距，其中铁的风成输入可能会促进高固定率。
The role of nitrogen fixation in the nitrogen cycle of the North Atlantic basin was re-evaluated because recent estimates had indicated a far higher rate than previous reports. Examination of the available data on nitrogen fixation rates and abundance ofTrichodesmium, the major nitrogen fixing organism, leads to the conclusion that rates might be as high as 1.09 × 1012mol N yr-1. Several geochemical arguments are reviewed that each require a large nitrogen source that is consistent with nitrogen fixation, but the current data, although limited, do not support a sufficiently high rate. However, recent measurements of the fixation rates per colony are higher than the historical average, suggesting that improved methodology may require a re-evaluation through further measurements. The paucity of temporally resolved data on both rates and abundance for the major areal extent of the tropical Atlantic, where aeolian inputs of iron may foster high fixation rates, represents another major gap.