Nitrogen dynamics in the Irish Sea and adjacent shelf waters: An exploration of dissolved organic nitrogen
Nitrogen dynamics in the Irish Sea and adjacent shelf waters: An exploration of dissolved organic nitrogen
复制标题
爱尔兰海和邻近陆架水域的氮动态：溶解有机氮的探索
DOI：
10.1016/j.ecss.2015.07.030
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Moschonas G
中科院分区：
文献类型：
--
作者：
Moschonas G
海洋环境中溶解有机氮（DON）的研究相对较少，因为历史上的研究主要集中在溶解无机氮（DIN）上。在这项研究中，我们结合联合收割机测量溶解有机物（DOM），DIN，颗粒有机氮（PON），溶解无机磷（DIP）和硅（DIS），从英国和爱尔兰西部陆架区的温度和盐度数据，并与来自爱尔兰海西部的无机和有机氮（N）数据，以了解爱尔兰海和邻近陆架沃茨的N动态，和调查的作用，DON的季节性分层的爱尔兰西部海的氮预算。2013年1月，采样区按密度锋分为4个不同海洋学和均质化学的区域。DON浓度占总溶解氮（TDN）的25.3 ± 1.8%。DOM浓度一般从利物浦湾的淡水影响水的凯尔特海和马林陆架的海洋沃茨。尿素和溶解性游离氨基酸（DFAA）共占DON的27.3 ± 3.1%。流入利物浦湾的河流中的估计浓度分别为8.0和2.1 μmol N L− 1：处于报告的河流浓度的高端。海洋营养输入爱尔兰海只有一个小的影响，N浓度。河流氮输入到爱尔兰海是大量的，但可能会被自然的N循环过程。在爱尔兰海西部，DON和PON浓度分别在仲夏和早春达到最大值和最小值。德国工业协会的趋势正好相反。DON占全年内部N循环的38%，我们估计，在春季水华开始时，多达1.4 ± 1.2 μmol N L− 1的不稳定DON可作为N源。我们的研究支持这样一种观点，即DON在温带大陆架和沿海海域的N循环中起着重要作用，如果我们要在不断变化的世界中全面了解N动态，则应更经常地将其包括在地球化学测量中。
Relatively little is known about dissolved organic nitrogen (DON) in the marine environment because research has historically focused on dissolved inorganic nitrogen (DIN). In this study we combine measurements of dissolved organic matter (DOM), DIN, particulate organic nitrogen (PON), dissolved inorganic phosphorus (DIP) and silicon (DIS), with temperature and salinity data from the western shelf region of the UK and Ireland, and with inorganic and organic nitrogen (N) data from the western Irish Sea to develop an understanding of N dynamics in the Irish Sea and adjacent shelf waters, and investigate the role of DON in the nitrogen budget of the seasonally stratifying western Irish Sea. In January 2013, the sampling area was divided by density fronts into 4 regions of distinct oceanography and homogeneous chemistry. DON concentrations accounted for 25.3 ± 1.8% of total dissolved N (TDN) across all regions. DOM concentrations generally decreased from the freshwater influenced water of Liverpool Bay to the oceanic waters of the Celtic Sea and Malin Shelf. Urea and dissolved free amino acids (DFAA) together made up 27.3 ± 3.1% of DON. Estimated concentrations in the rivers discharging into Liverpool Bay were 8.0 and 2.1 μmol N L−1respectively: at the high end of reported riverine concentrations. Oceanic nutrient inputs to the Irish Sea only have a small influence on N concentrations. Riverine N inputs to the Irish Sea are substantial but are likely removed by natural N cycling processes. In the western Irish Sea, DON and PON concentrations reached maxima and minima in midsummer and early spring respectively. DIN followed the opposite trend. DON accounted for 38% of the yearly internal N cycling and we estimated that as much as 1.4 ± 1.2 μmol N L−1of labile DON was available as an N source at the start of the spring bloom. Our study supports the view that DON plays an important role in N cycling in temperate shelf and coastal seas and should be included more often in biogeochemical measurements if we are to have a complete understanding of N dynamics in a changing world.
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影响因子：
6.6
作者：
Davidson, Keith;Miller, Peter;Swan, Sarah
通讯作者：
Swan, Sarah
DOI：
10.1016/b978-012323841-2/50014-2
发表时间：
2002
期刊：
--
影响因子：
--
作者：
G. Cauwet
通讯作者：
G. Cauwet
赫布里底群岛水域的一些海洋学特征
DOI：
10.1017/s026972700001263x
发表时间：
1979
期刊：
Proceedings of The Royal Society B: Biological Sciences
影响因子：
--
作者：
D. J. Ellett
通讯作者：
D. J. Ellett
苏格兰克雷兰湖的化学调查。
影响因子：
2
作者：
L. Solórzano;B. Ehrlich
通讯作者：
B. Ehrlich
影响因子：
2.3
作者：
BOOTH, DA;ELLETT, DJ
通讯作者：
ELLETT, DJ