Key Laboratory of Marine Chemistry Theory and Technology, Ocean University of China, Ministry of Education/Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao 266100, China; Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation, Qinzhou University, Qinzhou 535099, China.
Key Laboratory of Marine Chemistry Theory and Technology, Ocean University of China, Ministry of Education/Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao 266100, China; Shandong Provincial Key Laboratory of Ocean Environment Monitoring Technology, Shandong Academy of Sciences Institute of Oceanographic Instrumentation, Qingdao 266001, China.
Mar Pollut Bull. 2015 Jul 15;96(1-2):471-84. doi: 10.1016/j.marpolbul.2015.05.003. Epub 2015 May 7.
This study investigated the distribution and roles of total organic carbon (TOC), biogenic silicon (BSi), various forms of nitrogen (N) and phosphorus (P), and the stable carbon isotope (δ(13)C) in surface sediments of the Yangtze River Estuary (YRE) and adjacent sea. Terrestrial input accounted for 12-63% of total organic matter in the study area. The distribution of biogenic elements was affected by the Changjiang Diluted Water, the Jiangsu Coastal Current, human activities, marine biological processes, and the sediment grain size. Potentially bioavailable N and P accounted for an average 79.6% of the total N (TN) and 31.8% of the total P (TP), respectively. The burial fluxes for TOC, BSi, TN and TP were 39.74-2194.32, 17.34-517.48, 5.02-188.85 and 3.10-62.72 μmol cm(-2) yr(-1), respectively. The molar ratios of total N/P (1.2-5.0), Si/P (5.0-14.8) and Fe/P (21-61) indicated that much of the P was sequestered in sediments.
本研究调查了长江口（YRE）及其毗邻海域表层沉积物中总有机碳（TOC）、生物硅（BSi）、各种形态氮（N）和磷（P）以及稳定碳同位素（δ(13)C）的分布和作用。在研究区域，陆地输入占总有机物质的 12-63%。生物元素的分布受到长江淡水、江苏沿岸流、人类活动、海洋生物过程和沉积物粒径的影响。潜在生物可利用的 N 和 P 分别占总 N（TN）的 79.6%和总 P（TP）的 31.8%。TOC、BSi、TN 和 TP 的埋藏通量分别为 39.74-2194.32、17.34-517.48、5.02-188.85 和 3.10-62.72 μmol cm(-2) yr(-1)。总 N/P（1.2-5.0）、Si/P（5.0-14.8）和 Fe/P（21-61）的摩尔比表明，大部分磷被固定在沉积物中。
