New primary production and nitrification in the western subtropical North Atlantic: A modeling study
New primary production and nitrification in the western subtropical North Atlantic: A modeling study
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北大西洋西亚热带新的初级生产和硝化作用：模拟研究
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
P. Pondaven
中科院分区：
文献类型：
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作者：
A. P. Martin;P. Pondaven
新初级生产量的最初定义是基于这样的假设，即为藻类生长提供营养的氮基质将在当年第一次与浮游植物接触。因此，如果硝化作用产生的硝酸盐在地表水中很重要，那么硝酸盐的吸收就不能再简单地归因于新的生产。以亚热带北大西洋中的百慕大大西洋时间序列站为中心，进行了一次模拟研究。我们首次量化了硝化作用在通过一个完整的年度循环为初级生产提供硝酸盐燃料方面的作用。这些结果证实了之前有限的观察结果，这些观察表明，以前被认为是新产生的硝酸盐吸收的主要部分在寡养区(硝化作用将最具影响力)，实际上可能涉及“循环”硝酸盐。
The original definition of new primary production rests on the assumption that nitrogenous substrate taken up to fuel algal growth is coming into contact with phytoplankton for the first time that year. Therefore, should the generation of nitrate from ammonium by nitrification turn out to be significant in surface waters then nitrate uptake can no longer be simply ascribed to new production. A modeling study is presented centered on the Bermuda Atlantic Time‐series Station, in the oligotrophic subtropical North Atlantic. We quantify the role of nitrification in providing nitrate to fuel primary production through a full annual cycle for the first time. The results confirm previous limited observations suggesting that a major fraction of nitrate uptake in oligotrophic regions (where nitrification will be most influential), previously ascribed to new production, may actually involve “recycled” nitrate.