Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
Mar Pollut Bull. 2012 Jun;64(6):1148-55. doi: 10.1016/j.marpolbul.2012.03.028. Epub 2012 Apr 24.
Total organic carbon (TOC), total nitrogen (TN) and their δ(13)C and δ(15)N values were determined for 42 surface sediments from coastal Bohai Bay in order to determine the concentration and identify the source of organic matter. The sampling sites covered both the marine region of coastal Bohai Bay and the major rivers it connects with. More abundant TOC and TN in sediments from rivers than from the marine region reflect the situation that most of the terrestrial organic matter is deposited before it meets the sea. The spatial variation in δ(13)C and δ(15)N signatures implies that the input of organic matter from anthropogenic activities has a more significant influence on its distribution than that from natural processes. Taking the area as a whole, surface sediments in the marine region of coastal Bohai Bay are dominated by marine derived organic carbon, which on average accounts for 62±11% of TOC.
为了确定有机物质的浓度和来源，对来自渤海湾近岸 42 个表层沉积物的总有机碳（TOC）、总氮（TN）及其δ(13)C 和 δ(15)N 值进行了测定。采样点覆盖了渤海湾近岸的海洋区域以及与之相连的主要河流。与海洋区域相比，来自河流的沉积物中含有更多的 TOC 和 TN，这反映了大部分陆地有机物质在入海之前就已经沉积的情况。δ(13)C 和 δ(15)N 特征的空间变化表明，与自然过程相比，人为活动输入的有机物质对其分布的影响更为显著。就整个区域而言，渤海湾近岸海洋区域的表层沉积物主要由海洋来源的有机碳组成，其平均占 TOC 的 62±11%。
