由东海、黄海沉积物中有机碳含量及稳定同位素组成重建200a以来初级生产力历史记录

蔡德陵; 孙耀; 张小勇; 苏远峰; 吴永华; 陈志华; 杨茜

由东海、黄海沉积物中有机碳含量及稳定同位素组成重建200a以来初级生产力历史记录

1.
中国水产科学研究院黄海水产研究所,山东青岛266071;国家海洋局第一海洋研究所,山东青岛 266061
2.
中国水产科学研究院黄海水产研究所,山东青岛266071
3.
国家海洋局第一海洋研究所,山东青岛 266061

基金项目: 国家重点基础研究发展计划项目(2010CB428902)；国家自然科学基金面上项目(40876088)。

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出版历程
- 收稿日期: 2012-08-27

Reconstructing a primary productivity history over the past 200 a using the sediment organic carbon content and the stable isotope composition from the East China Sea and the Yellow Sea

1.
Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071,China;First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
2.
Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071,China
3.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

摘要

摘要: 从20世纪80年代以来古生产力的重建研究一直是国内外海洋生态学研究的热点，但已有的大多数研究是在深海区;而陆架区的特点是来自陆源物质的影响往往比较明显，因此，研究难度远较深海区大。利用现代沉积物中的有机碳稳定同位素组成来估算海源碳的含量，在此基础上，结合调查区域表层沉积物中的几个初级生产力的代表性指标(浮游植物总量、叶绿素 a浓度以及硅藻含量)的调查资料，寻求岩心中海源碳与古生产力指标的相关关系，再由南黄海冷涡沉积区3个典型柱状沉积物中海源碳重建了200 a以来高分辨率的古生产力记录，这对陆架海生态环境演变规律的研究有重要意义。对重建所得到的南黄海近代初级生产演化因素的初步探讨表明，近200 a来初级生产力波动升高与海水表层温度的升高趋势是一致的，但其最主要的控制因素还是营养盐的供应，其中陆源营养物质和污染物质的影响起到了重要的作用。
- 有机碳 /
- 碳同位素 /
- 初级生产力 /
- 东海 /
- 黄海
Abstract: The reconstruction of paleoproductivity at home and abroad has been a hot spot in the research of marine ecology since the 1980s. However, most of the studies are in abyssal regions. Continental shelf areas are influenced more obviously by the terrigenous matter and more difficult to be studied than abyssal regions. It makes use of carbon stable isotope compositions in organic matter of modern sediments to estimate the sea-derived carbon contents. Based on this, combining the investigation data of the several representative indicators of the primary productivity in surface sediments (phytoplankton biomass, chlorophyll-a concentration, as well as the diatom content), to seek correlation between the sea-derived carbon content and the productivity index in cores. Then, the high resolution of the paleoproductivity records over 200 a can be reconstructed from the sea-derived carbon content in 3 typical columnar sediments from the southern Huanghai Sea cold eddy zone. It has important significance for studying the evolution rule of ecological environment in the continental shelf area. Controlling factors on the primary productivity evolution reconstructed for the southern Yellow Sea are discussed elementarily, it shows that the primary productivity wave elevation over 200 a is consistent with sea surface temperature trends, but its main control factor still is nutrient supply, in which land nutrients and pollutants play an important role.
- organic carbon /
- carbon stable isotopes /
- primary productivity /
- East China Sea /
- Yellow Sea

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