桑沟湾养殖海域沉积物中碳埋藏通量的长期记录  

The long-term records of carbon burial fluxes in sediment cores of culture zones from Sanggou Bay

作　　者：刘赛[1,2] 杨茜[2] 杨庶[2] 孙耀[2] 杨桂朋[1] 

机构地区：[1]中国海洋大学化学与化工学院海洋化学理论与工程技术教育部重点实验室,山东青岛266003 [2]中国水产科学研究院黄海水产研究所,山东青岛266071

出　　处：《海洋学报》2014年第8期30-38,共9页

基　　金：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)

摘　　要：对取自桑沟湾北部和南部养殖海域2个站位柱状沉积物样品进行研究，测定了它们的总碳（TC）、有机碳（TOC）、无机碳（TIC）含量，估算了海源有机碳（Ca ），结合沉积物年代序列测定，对碳的来源和埋藏通量（BF）进行分析。结果表明：从19世纪到20世纪初，桑沟湾碳埋藏基本处于平稳期；20世纪初开始，伴随着中国工业革命兴起，湾内营养水平提高，大量天然小型贝类繁殖及残骸埋藏使桑沟湾碳埋藏量有大幅度突跃；20世纪60年代以来人工养殖活动兴起及到90年代大规模养殖后，天然贝类繁殖受抑制且伴随养殖产品的不断收获，使此期间碳埋藏量又处于平稳期。20世纪60年代前BFCa/BFTOC和 BFCa/BFTC的比值分别在20％和4％以下波动，其后随养殖活动增加呈显著增大趋势；但 BFTOC/BFTC比值基本在40％以下范围内波动。并将该区与取自黄海中部一柱状沉积物的BFTIC/BFTC比值作对比，桑沟湾 BFTIC/BFTC比值基本在60％～98％之间远高于黄海中部（约15％）的比值，桑沟湾 TIC 与 TC 含量高比值使仅应用 TOC 或 Ca 含量估算碳埋藏通量可能带来巨大误差。Total carbon （TC）,total organic carbon （TOC）,total inorganic carbon （TIC）and marine-derived organic carbon （Ca ）in two sediment cores of the Sanggou Bay were analyzed.Combined with sedimentary chronose-quence,the burial fluxes （BF）of carbon were determined.The result shows that burial fluxes of carbon were rela-tively steady before 1900s;however,along with the rise of the industrial revolution,natural small shellfish thrived due to the increase of nutrients in the inner bay,leading to a rapid increase of burial fluxes;and then,from 1960s, with the development of large-scale artificial farming,carbon burial fluxes gradually reached a steady state again be-cause of the growing effort of harvesting.Before the 1960s,the ratios of BFC/BFTOC and BFC a/BFTC were under a 20% and 4% respectively,after that time,with the expansion of farming activities,although the ratios keep increas-ing,the ratio of BFTOC/BFTC were under 40% all the time.The ratio of BFTIC/BFTC in Sanggou Bay,which were between 60% and 98%,was higher than the ratio （about 15%）in the central Huanghai Sea.The high ratio of TIC/TC in Sanggou Bay may result in great errors when using TOC or Ca to estimate the burial fluxes of carbon.

关 键 词：碳埋藏 海源有机碳 柱状沉积物 桑沟湾 

分 类 号：P736.41[天文地球—海洋地质]