Influence of water-column anoxia on the elemental fractionation of carbon and phosphorus during sediment diagenesis
Influence of water-column anoxia on the elemental fractionation of carbon and phosphorus during sediment diagenesis
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DOI：
10.1016/s0025-3227(96)00112-0
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发表时间：
1997-06-01
期刊：
影响因子：
2.9
通讯作者：
Jahnke, R
中科院分区：
文献类型：
--
作者：
Ingall, E;Jahnke, R
有机碳氧化和底栖总磷通量测量数据来自覆盖一系列底水氧浓度的站点。数据表明，在缺氧水体覆盖的沉积物中，相对于碳氧化，磷的再生更为广泛。这些结果与研究结果一致，表明低氧底水浓度与总磷埋藏效率降低和有机碳埋藏效率提高相关。基于这些观测结果，提出了水柱缺氧、底栖磷再生增强和海洋生产力之间的正反馈关系。这种反馈可能有助于解释地质记录中观察到的缺氧水域中富有机物海洋沉积物的广泛积累。(C) 1997爱思唯尔科学有限公司
Organic carbon oxidation and benthic total phosphorus flux measurements from sites covering a range of bottom-water oxygen concentrations have been compiled. The data show that P regeneration relative to carbon oxidation is much more extensive in sediments overlain by oxygen-depleted waters. These results are consistent with studies showing that low oxygen bottom-water concentrations correlate with reduced total phosphorus burial efficiencies and enhanced organic carbon burial efficiencies. Based on these observations a positive feedback is proposed between water-column anoxia, enhanced benthic phosphorus regeneration, and marine productivity. This feedback may help explain the widespread accumulation of organic-rich marine sediments from anoxic waters observed in the geologic record. (C) 1997 Elsevier Science B.V.