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桑沟湾及附近海域表层沉积物碳氮同位素分析及有机质来源
引用本文:夏斌,崔毅,陈碧鹃,崔正国,曲克明,马菲菲.桑沟湾及附近海域表层沉积物碳氮同位素分析及有机质来源[J].海洋学报(英文版),2014,33(12):48-57.
作者姓名:夏斌  崔毅  陈碧鹃  崔正国  曲克明  马菲菲
作者单位:中国水产科学研究院 黄海水产研究所 农业部海洋渔业资源可持续发展重点实验室 山东省渔业资源与生态环境重点实验室, 山东, 青岛 266071;中国水产科学研究院 黄海水产研究所 农业部海洋渔业资源可持续发展重点实验室 山东省渔业资源与生态环境重点实验室, 山东, 青岛 266071;中国水产科学研究院 黄海水产研究所 农业部海洋渔业资源可持续发展重点实验室 山东省渔业资源与生态环境重点实验室, 山东, 青岛 266071;中国水产科学研究院 黄海水产研究所 农业部海洋渔业资源可持续发展重点实验室 山东省渔业资源与生态环境重点实验室, 山东, 青岛 266071;中国水产科学研究院 黄海水产研究所 农业部海洋渔业资源可持续发展重点实验室 山东省渔业资源与生态环境重点实验室, 山东, 青岛 266071;中国水产科学研究院 黄海水产研究所 农业部海洋渔业资源可持续发展重点实验室 山东省渔业资源与生态环境重点实验室, 山东, 青岛 266071
基金项目:The Joint Fund Project of National Fund Committee and Shandong Province under contract No. U1406403; the State Oceanic Administration Project of China under contract Nos DOMEP (MEA)-01-01 and DOMEP (MEA)-02.
摘    要:Naturally existing stable carbon and nitrogen isotopes are important in the study of sedimentary organic matter sources. To identify the sources of sedimentary organic matter in Sanggou Bay and its adjacent areas, which is characterized by high-density shellfish and seaweed aquaculture, the grain size, organic carbon(OC), total nitrogen(TN), carbon and nitrogen isotopic composition(δ13C and δ15N) of organic matter in the surface sediment were determined. The results showed that, in August, sedimentary OC and TN ranged from 0.17% to 0.76% and 0.04% to 0.14%, respectively. In November, OC and TN ranged from 0.23% to 0.87% and 0.05% to 0.14%, respectively. There was a significant positive correlation between OC and TN(R=0.98, P0.0001), indicating that OC and TN were homologous. In August, the δ13C and δ15N of organic matter varied from-23.06‰ to-21.59‰ and 5.10‰ to 6.31‰, respectively. In November, δ13C and δ15N ranged from-22.87‰ to-21.34‰ and 5.13‰ to 7.31‰, respectively. This study found that the major sources of sedimentary organic matter were marine shellfish biodeposition, seaweed farming, and soil organic matter. Using a three-end-member mixed model, we estimated that the dominant source of sedimentary organic matter was shellfish biodeposition, with an average contribution rate of 65.53% in August and 43.00% in November. Thus, shellfish farming had a significant influence on the coastal carbon cycle.

关 键 词:沉积有机质  表层沉积物  氮同位素  桑沟湾  同位素分析  邻近地区  定碳  中国
收稿时间:2013/12/19 0:00:00
修稿时间:7/8/2014 12:00:00 AM

Carbon and nitrogen isotopes analysis and sources of organic matter in surface sediments from the Sanggou Bay and its adjacent areas, China
XIA Bin,CUI Yi,CHEN Bijuan,CUI Zhengguo,QU Keming and MA Feifei.Carbon and nitrogen isotopes analysis and sources of organic matter in surface sediments from the Sanggou Bay and its adjacent areas, China[J].Acta Oceanologica Sinica,2014,33(12):48-57.
Authors:XIA Bin  CUI Yi  CHEN Bijuan  CUI Zhengguo  QU Keming and MA Feifei
Affiliation:Key Laboratory of Sustainable Utilization of Marine Fisheries Resources of Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences, Qingdao 266071, China
Abstract:Naturally existing stable carbon and nitrogen isotopes are important in the study of sedimentary organic matter sources. To identify the sources of sedimentary organic matter in Sanggou Bay and its adjacent areas, which is characterized by high-density shellfish and seaweed aquaculture, the grain size, organic carbon (OC), total nitrogen (TN), carbon and nitrogen isotopic composition (δ13C and δ15N) of organic matter in the surface sediment were determined. The results showed that, in August, sedimentary OC and TN ranged from 0.17% to 0.76% and 0.04% to 0.14%, respectively. In November, OC and TN ranged from 0.23% to 0.87% and 0.05% to 0.14%, respectively. There was a significant positive correlation between OC and TN (R=0.98, P<0.0001), indicating that OC and TN were homologous. In August, the δ13C and δ15N of organic matter varied from -23.06‰ to -21.59‰ and 5.10‰ to 6.31‰, respectively. In November, δ13C and δ15N ranged from -22.87‰ to -21.34‰ and 5.13‰ to 7.31‰, respectively. This study found that the major sources of sedimentary organic matter were marine shellfish biodeposition, seaweed farming, and soil organic matter. Using a three-end-member mixed model, we estimated that the dominant source of sedimentary organic matter was shellfish biodeposition, with an average contribution rate of 65.53% in August and 43.00% in November. Thus, shellfish farming had a significant influence on the coastal carbon cycle.
Keywords:carbon  nitrogen  stable isotopes  organic matter  sources  sediment  Sanggou Bay
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