Seasonal variations in the abundance and sinking flux of biogenic silica in Daya Bay, northern South China Sea
Seasonal variations in the abundance and sinking flux of biogenic silica in Daya Bay, northern South China Sea
复制标题
南海北部大亚湾生物硅丰度和沉降通量的季节变化
DOI：
10.1016/j.oceano.2018.11.003
复制
发表时间：
2019-04
期刊：
影响因子：
2.9
通讯作者：
Zheng Minfang
中科院分区：
文献类型：
--
作者：
Zhao Xiufen;Yang Weifeng;Ma Haoyang;Li Junjie;Chen Min;Fang Ziming;Zhang Xiao;Zeng Jian;Qiu Yusheng;Zheng Minfang
沿海海洋占海洋环境中生物硅（BSi）产量的50%以上。然而，对BSi下沉的了解甚少。本文研究了南海北方大亚湾海域BSi丰度和沉降通量的季节变化。BSi浓度最高值出现在夏季，平均值为8.04 ± 5.48 μmol L−1（±SD），其次是秋季（5.51 ± 3.11 μmol L−1）和春季（3.76 ± 3.06 μmol L−1）。BSi浓度在冬季最低，为2.93 ± 1.34 μmol L− 1。根据234 Th/238 U不平衡计算，春季、夏季和秋季BSi沉降通量分别为7.08 ± 8.62、10.01 ± 13.95和8.30 ± 13.06 mmol Si m−2d− 1。冬季最低，为4.19 ± 3.98 mmol Si m−2d− 1。与氮通量一起，硅：氮沉降比在春、夏、秋、冬分别为0.8：1.0、1.5：1.0、1.6：1.0和1.4：1.0，表明大亚湾的硅沉降比氮沉降快。
Coastal seas account for >50% of the biogenic silica (BSi) production in marine environments. However, BSi sinking is poorly understood. Here, seasonal variations in the abundance and sinking flux of BSi were investigated in Daya Bay, in the northern South China Sea. The highest BSi concentrations occurred in summer, averaging 8.04 ± 5.48 μmol L−1(±SD), followed by autumn (5.51 ± 3.11 μmol L−1) and spring (3.76 ± 3.06 μmol L−1). The lowest BSi concentration of 2.93 ± 1.34 μmol L−1was observed in winter. Based on234Th/238U disequilibria, the average BSi sinking fluxes were 7.08 ± 8.62, 10.01 ± 13.95, and 8.30 ± 13.06 mmol Si m−2d−1in spring, summer, and autumn, respectively. The lowest flux of 4.19 ± 3.98 mmol Si m−2d−1was measured in winter. Together with nitrogen fluxes, the Si:N sinking ratios were 0.8:1.0, 1.5:1.0, 1.6:1.0, and 1.4:1.0 in spring, summer, autumn, and winter, respectively, indicating that particle sinking induces the faster removal of Si compared to N in Daya Bay.
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影响因子：
--
作者：
Weifeng Yang;Yipu Huang;Min Chen;Y. Qiu;A. Peng;Lei Zhang
通讯作者：
Weifeng Yang;Yipu Huang;Min Chen;Y. Qiu;A. Peng;Lei Zhang
DOI：
10.1007/bf02803627
发表时间：
2003-10
期刊：
Estuaries
影响因子：
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作者：
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影响因子：
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影响因子：
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作者：
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通讯作者：
Gloria E Sánchez;S. Pantoja;C. Lange;H. González;G. Daneri