溶解态和颗粒态氮在台湾北部淡水河口的分配和分布。
Dissolved and particulate nitrogen species partitioning and distribution in the Danshuei River estuary, northern Taiwan.
机构信息
Department of Marine Environmental Informatics, National Taiwan Ocean University, Keelung 202, Taiwan.
Department of Marine Environmental Informatics, National Taiwan Ocean University, Keelung 202, Taiwan.
出版信息
Mar Pollut Bull. 2021 Mar;164:111981. doi: 10.1016/j.marpolbul.2021.111981. Epub 2021 Jan 20.
Danshuei River Estuary (DRE) total and inorganic nitrogen in the dissolved (TDN, DIN) and particulate (TPN, PIN) phases were analyzed to study their distribution and partitioning. The carbon contents in particles were also analyzed. The upper estuary contained higher ammonium concentration (304-557 μM), leading to TDN completely dominating (>95%) the total N (TDN + TPN) pool within the DRE. Ammonium played a crucial role in controlling the speciation variation of DIN and partitioning between dissolved and particulate phases. Nitrification seemed to occur in the salinity >30 region where elevated percentages of nitrite and nitrate were observed. PON dominated the particulate N and contributed an average of 62% of the TPN pool. A constant organic C/N ratio (6.55) was observed in particles, indicating that POM was mainly from phytoplankton detritus. The N distribution coefficient values, log(K), ranged from 3 to 4, suggesting that the affinity of DIN for particles was weak.
对淡水溪河口（DRE）中溶解态（TDN、DIN）和颗粒态（TPN、PIN）的总氮和无机氮（TDN、DIN）进行了分析，以研究它们的分布和分配情况。还分析了颗粒中的碳含量。在上河口，氨的浓度较高（304-557μM），导致 TDN 完全主导（>95%）DRE 中的总 N（TDN+TPN）库。氨在控制 DIN 的形态变化和溶解态与颗粒态之间的分配方面起着关键作用。似乎在盐度>30 的区域发生了硝化作用，在该区域观察到亚硝酸盐和硝酸盐的百分比升高。PON 主导颗粒态氮，平均占 TPN 库的 62%。颗粒中的有机碳/氮比（6.55）保持不变，表明 POM 主要来自浮游植物碎屑。N 分布系数值，log(K)，范围从 3 到 4，表明 DIN 与颗粒的亲和力较弱。
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