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1海洋沉积物/颗粒物在生源要素循环中的作用及生态学功能显示文摘海洋沉积物/颗粒物是生源要素循环过程中的关键源与汇,沉积物/颗粒物一方面是海水生源要素的主要归宿,生源要素从溶解态经复杂的生物-化学过程转变为颗粒态,颗粒物质再沉降形成沉积物,另一方面,海洋沉积物/颗粒物经过微生物-浮游动物-底栖生物作用分解形成溶解态的生源要素,并释放到海水中再次被浮游植物利用,进入下一轮循环,所以,海洋沉积物/颗粒物具有异常重要的生态学功能。浮游植物是海水溶解态生源要素的利用者和海源颗粒态生源要素的初始形成者,浮游动物通过摄食浮游植物或其他有机颗粒物可释放出溶解态生源要素或形成更大的颗粒物,颗粒物沉降后形成的沉积物又通过底栖生物摄食-扰动-破碎等过程将颗粒生源要素释放进入水体参与再循环。生态系统不同类群的生物在颗粒生源要素的释放-沉降中所起的作用不同而又相互关联,其中浮游动物-底栖生物的摄食与代谢、微生物参与的分解过程起着非常重要的作用。所以,海洋沉积物/颗粒物生态学功能研究作为支撑海洋环境和资源的持续利用的科学基础,已成为海洋科学的前沿领域,必将获得跨越发展。宋金明 李学刚 2018海洋学报2018,40,10:18
2大沽河湿地表层沉积物重金属分布特征及污染评价显示文摘胶州湾属半封闭海湾,水体交换能力较弱,受多条河流入海影响,污染日趋加重,通过大沽河的径流量、输沙量和溶解污染物占到胶州湾入海河流的首位。根据区域特征,于2009年2、5、8、11月对大沽河湿地48个采样点表层沉积物中的Cu、Zn、Pb、Cd、Hg、As、有机碳、粒度进行测定,探讨了重金属含量和污染特征与总有机碳、粒度的关系,利用污染评价法和潜在生态风险评价法进行污染和风险分析。结果表明:胶州湾大沽河湿地表层沉积物重金属含量较低,大部分测站符合海洋沉积物质量(GB18668—2002)Ⅰ类标准的要求。表层沉积物中Cu、Pb、Zn含量8月份最高、2月份次之、5月份最低。Pb、Hg、As3种重金属含量在2月份最高。Cu、Pb、Zn和Cd重金属之间存在显著正相关关系,Hg与As存在明显的相关关系;除Cd和As外的4种重金属与沉积物粘土、有机碳含量之间也存在显著正相关性。重金属单因子污染程度总体较轻,属于低污染水平,污染程度依次为Hg>Cd>Pb>Cu>As>Zn。大沽河河口区表层沉积物重金属潜在生态风险总体处于较低水平,风险程度依次为Hg>Cd>Pb>Cu>As>Zn。徐勇 马绍赛 陈聚法 赵俊 夏斌 崔正国 2012农业环境科学学报2012,31,6:16
3胶州湾湿地海域水体和表层沉积物环境质量评价显示文摘基于2009年对胶州湾湿地48个站点的调查数据,采用内梅罗(Nemerow)指数、富营养指数(EI)和Hakanson潜在生态危害指数法对胶州湾湿地水体和表层沉积物环境质量现状进行了评价.结果表明:对参与评价的pH值、溶解氧、无机氮、活性磷酸盐、CODMn、石油类、Cu、Zn、Pb、Cd、Hg、As、六六六、滴滴涕、大肠菌群、粪大肠菌群等16项指标而言,各调查月份大沽河感潮河段水质处于中污染-重污染水平,潮间带区域水质处于轻污染-中污染水平,浅海区域水质处于轻污染水平.胶州湾湿地不同区域富营养化程度差异明显,其中大沽河感潮河段水体EI值在58.13~327.89,富营养化程度严重;潮间带区域水体EI值在1.34~19.96,富营养化程度较为严重;浅海区域水体EI值在0.65~2.10,富营养化程度较轻.胶州湾湿地海域表层沉积物质量基本处于轻污染水平,其中大沽河感潮河段处于轻污染水平,潮间带区域处于轻污染-中污染水平,浅海区域处于较清洁-轻污染水平.胶州湾湿地海域表层沉积物中重金属单项污染参数(Cfi)和污染程度指数(Cd)较低,污染程度处于低级水平,Cu、Zn是表层沉积物中的主要污染因子;重金属潜在的生态危害系数(Eri)和潜在生态危害指数(RI)较小,污染程度属于低生态危害范畴.马洪瑞 陈聚法 崔毅 赵俊 杨风 2011应用生态学报2011,22,10:13
4胶州湾的生态环境演变与营养盐变化的关系显示文摘作为我国人为影响海洋研究与海洋学基础研究的典型海域,胶州湾历经90年的科学调查和研究,获得了系统的对胶州湾海洋学的认识。本文总结归纳了近年来胶州湾的生态环境变化状况、营养物质输入以及百年来生态环境演变的主要结果和结论。近年来,胶州湾海水呈现“高氮-低磷-低硅富营养化”状况较明显,浮游生物生物量有增加的趋势,输入到胶州湾营养物质的量巨大,总溶解态氮的年输入通量为6945.4 t/a,其中无机氮、有机氮分别为4453.1 t/a,2492.3 t/a。点源和河流是总溶解态氮的主要输入方式,分别占无机氮输入通量的39%和20%,有机氮输入通量的31%和41%。总溶解态磷的年输入通量为160.6 t/a,其中无机磷的输入略高于有机磷,二者分别为88.0 t/a,72.6 t/a。河流和点源是无机磷的主要输入方式,分别占无机磷输入通量的40%和30%,而对于有机磷而言,河流是其主要的输入方式,可占其输入通量的51%,而地下水和点源也分别占输入通量的24%和15%,这些大量输入的营养物质对胶州湾生态环境变化起了关键作用。胶州湾百年来经历了三个阶段的演变,20世纪70年代以前,胶州湾受人为影响很小,其化学要素水平基本呈现“背景值”且比较稳定,从20世纪80年代起,胶州湾明显受到人为活动的影响,其沉积物中的化学组分持续增加,直到20世纪90年代中到2000年达到高峰,2000年后,由于环保治理措施的加强,沉积物中的化学组分呈明显降低趋势,基本稳定在较低的水平。宋金明 袁华茂 李学刚 段丽琴 2020海洋科学2020,44,8:11
5Temporal-spatial variation of DOC concentration, UV absorbance and the flux estimation in the Lower Dagu River, China显示文摘Min XI Fanlong KONG Yue LI Fanting KONG 2017Frontiers of Structural and Civil Engineering2017,11,4:6
6One century record of contamination by polycyclic aromatic hydrocarbons and polychlorinated biphenyls in core sediments from the southern Yellow Sea显示文摘Sixteen polycyclic aromatic hydrocarbons (PAHs) and 28 polychlorinated biphenyls (PCBs) were measured at a 2-cm interval in a core sample from the middle of the southern Yellow Sea for elucidating their historical variations in inflow and sources. The chronology was obtained using the 210Pb method. PAHs concentrations decreased generally with depth and two climax values occurred in 14–16 cm and 20–22 cm layers, demonstrating that the production and usage of PAHs might reach peaks in the periods of 1956–1962 and 1938–1944. The booming economy and the navy battles of the Second World War might explain why the higher levels were detected in the two layers. The result of principal component analysis (PCA) revealed that PAHs were primarily owing to the combustion product. Down-cored variation of PCB concentrations was complex. Higher concentrations besides the two peaks being the same as PAHs were detected from 4 to 8 cm, depositing from 1980 to 1992, which probably resulted from the disposal of the out-dated PCB-containing equipment. The average Cl percentage of PCBs detected was similar to that of the mixture of Aroclor 1254 and 1242, suggesting they might origin from the dielectrical and heat-transfer fluid. The total organic carbon (TOC) content played a prevalent role in the adsorption of high molecular weight PAHs ( 4-ring), while no obvious relationship among total PCBs, the concentration of congeners, and TOC was found.ZHANG Peng SONG Jinming FANG Jie LIU Zhigang LI Xuegang YUAN Huamao 2009Journal of Environmental Sciences2009,21,8:6
7桑沟湾养殖海域沉积物中碳埋藏通量的长期记录显示文摘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。刘赛 杨茜 杨庶 孙耀 杨桂朋 2014海洋学报2014,36,8:5
8The sources and composition of organic matter in sediments of the Jiaozhou Bay:implications for environmental changes on a centennial time scale显示文摘The Jiaozhou Bay is characterized by heavy eutrophication that is associated with intensive anthropogenic activities. Four core sediments from the Jiaozhou Bay are analyzed using bulk technologies, including sedimentary total organic carbon(TOC), total nitrogen(TN), the stable carbon(δ^(13)C) and nitrogen(δ^(15) N) isotopic composition to obtain the comprehensive understanding of the source and composition of sedimentary organic matter and further shed light on the environmental changes of the Jiaozhou Bay on a centennial time scale.Results suggest that the TOC and TN concentrations increase in the upper core, having indicated a probable eutrophication process since the 1920 s in the inner bay and the 2000 s in the bay mouth. The TOC and TN concentrations outside the bay have also changed since 1916 owing to the variation of terrigenous input.Considering TOC/TN ratio, δ^(13) C and δ^(15) N, it can be concluded there is a mixture of terrigenous and marine organic matter sources in the study area. A simple two end-member(terrigenous and marine) mixing model usingδ^(13) C indicats that 45%–79% of TOC in the Jiaozhou Bay is from the marine source. The environmental changes of the Jiaozhou Bay are recorded by geochemical proxies, which are influenced by the intensive anthropogenic activities(e.g., extensive use of fertilizers, and discharge of sewage) and climate changes(e.g., rainfall).KANG Xuming SONG Jinming YUAN Huamao LI Xuegang LI Ning DUAN Liqin 2017Acta Oceanologica Sinica2017,36,11:5
9桑沟湾沉积碳库年汇入速率的长期变化及其区域性差异显示文摘对取自桑沟湾北西南三根柱样近200a碳来源及埋藏通量的解析,分析了湾内不同站位各形态碳的差异性,进而对全湾碳埋藏进行了估算。湾内环流、贝藻养殖等造成湾内不同区域碳埋藏的差异;桑沟湾总碳(TC)平均量1.79%,有机碳(TOC)平均量0.54%,无机碳(TIC)平均量1.25%,TOC含量相对较小,为海陆混合来源,以陆源有机碳(Ct)为主,大规模人工养殖后,海源有机碳(Ca)有明显增加的趋势。桑沟湾碳埋藏通量平均为228.9g/(m^2·a),以无机碳为主要埋藏形式(约占70%),高的沉积速率及生物残骸沉降使桑沟湾养殖区碳的来源及埋藏区别于其他陆架海域。刘赛 杨庶 杨茜 孙耀 2018海洋学报2018,40,1:3
10Burial fluxes and sources of organic carbon in sediments of the central Yellow Sea mud area over the past 200 years显示文摘Long-term changes of composition,sources and burial fluxes of TOC(total organic carbon) in sediments of the central Yellow Sea mud area and their possible affecting factors are discussed in this paper.Firstly,similarity analysis is employed to confirm that the carbon burial features resulted from two collected cores are typical in the central Yellow Sea mud area where YSWC(Yellow Sea Warm Current) is prevalent.On this basis,the burial flux of TOC here was considered to be 235.5–488.4 μmol/(cm2?a) since the first industrial revolution,accounting for about 70%–90% among burial fluxes of TC(total carbon) in the sediments.Compared TOC/TC ratio in the two cores with that in other marine sediments worldwide,we suggest that the growth of calcareous/non-calcareous organisms and dissolution of IC(inorganic carbon) are important factors controlling the TOC/TC ratio in sediment.Results of two-end mixed model based on δ13C data indicate that marine-derived organic carbon(OCa)is the main part among total burial organic carbon which accounts for a ratio over 85%.Due to the high TOC/TC ratio in the two cores,TC in the sediments also mainly exists as OCa,and the proportion of OCa is about 60%–80%.Away from the shore and relatively high primary production in upper waters are the main reasons that OCa is predominant among all burial OC in sediments of the central Yellow Sea mud area.Burial of OC in this mud area is probably mainly influenced by the human activities.Although the economic development during the late 19 th century caused by the first industrial revolution in China did not obviously increase the TOC burial fluxes in the sediments,the rise of industry and agriculture after the founding of new China has clearly increased the TOC burial flux since 1950 s.Otherwise,we also realize that among TC burial fluxes,TIC account for about 10%–30% in sediments of the central Yellow Sea mud area,so its burial could not be simply ignored here.Distinct from TOC burial,long-term TIC burial fluxes variations relate with climate changes more closely:the East Asian summer monsoon may influence the strength of the Huanghe River(Yellow River) flood,which could further affect the transport of terrestrial IC from land to the central Yellow Sea as well as the burial of these IC in the sediments.YANG Shu YANG Qian LIU Sai CAI Deling QU Keming SUN Yao 2015Acta Oceanologica Sinica2015,34,10:3
11中国边缘海生态环境演变及其影响因素研究显示文摘从历史调查资料以及沉积物中地球化学指标和生物指标可剖析中国边缘海生态环境演变历史。中国边缘海近百年来生态环境发生巨变:水体富营养化显著、有害藻赤潮频发、底层水缺氧扩张、种群结构改变、生物多样性下降、渔业资源衰减、重金属污染加重。影响中国边缘海生态环境演变的调控因素主要包括自然因素和人为因素,近30年来生态环境的剧烈演变受人类活动影响显著。土地过度利用、化肥大量使用、滩涂围垦、水利修建、水产养殖、工业废水和市政污水的排放以及过度捕捞等人类活动是导致中国边缘海生态环境退化、生态系统结构改变和渔业资源减少的关键因素,周边地区工业废水的排放是重金属污染的主要因素。杨斌 石华先 钟秋平 鲁栋梁 林美芳 2016钦州学院学报2016,31,1:3
12Spatial and temporal variations of sedimented organic matter in Xiaohai Lagoon,Hainan Island显示文摘The characteristics of grain-size,total organic carbon(TOC) and total nitrogen(TN) contents,TOC/TN ratios,stable carbon isotope(δ13C) and 210 Pb dating were measured in six sediment cores from the Xiaohai Lagoon.The results show distinct spatial and temporal variations in sedimentation patterns.The sediments are dominated by clayey silt,sandy silt and by silty sand in the southern,middle lagoon and the northern lagoon,respectively.TOC and TN contents decline from south to north.Sedimentation rates,determined by 210 Pb dating,tend to decrease from south to middle.However,the determination of sedimentation rate in the north is difficult.These spatial variations are related to the variations in sediment sources and hydrodynamic conditions in the Xiaohai Lagoon.The variations of organic matter signatures can be divided into two stages in the cores from the southern and middle lagoon.Before 1988,the organic matter signatures are relatively stable.The contribution of terrestrial organic carbon sources varies between 60% and 85%.After 1988,the organic matter signatures demonstrate significant variations.TOC and TN contents increase rapidly,TOC/TN ratios decrease,δ13C values shift to higher and the contribution of terrestrial organic carbon sources decreases to 40%-50%.The contributions of phytoplankton organic matter have increased in the sediment since 1988.Increasing aquaculture activities have had a significant impact on organic matter signatures since 1988.The sedimentation rates have increased rapidly in the southern and middle lagoon since 1988 due to the anthropogenic activities which include aquaculture,mining and deforestation.These activities have caused eutrophication and increased siltation in the southern and middle lagoon.LIU Xingjian GE Chendong 2012Acta Oceanologica Sinica2012,31,3:3
13Burial fluxes and source apportionment of carbon in culture areas of Sanggou Bay over the past 200 years显示文摘In this study,we assessed the burial fluxes and source appointment of different forms of carbon in core sediments collected from culture areas in the Sanggou Bay,and preliminarily analyzed the reasons for the greater proportion of inorganic carbon burial fluxes(BFTIC).The average content of total carbon(TC) in the Sanggou Bay was 2.14%.Total organic carbon(TOC) accounted for a small proportion in TC,more than 65% of which derived from terrigenous organic carbon(Ct),and while the proportion of marine-derived organic carbon(Ca) increased significantly since the beginning of large-scale aquaculture.Total inorganic carbon(TIC) accounted for 60%–75%of TC,an average of which was 60%,with a maximum up to 90% during flourishing periods(1880–1948) of small natural shellfish derived from seashells inorganic carbon(Shell-IC).The TC burial fluxes ranged from 31 g/(m2·a)to 895 g/(m2·a) with an average of 227 g/(m2·a),which was dominated by TIC(about 70%).Shell-IC was the main source of TIC and even TC.As the main food of natural shellfish,biogenic silica(BSi) negatively correlated with BFTIC through affecting shellfish breeding.BFTIC of Sta.S1,influenced greatly by the Yellow Sea Coastal Current,had a certain response to Pacific Decadal Oscillation(PDO) in some specific periods.LIU Sai HUANG Jiansheng YANG Qian YANG Shu YANG Guipeng SUN Yao 2015Acta Oceanologica Sinica2015,34,10:2
14有机紫外吸收剂在珊瑚礁区的污染特征及生态风险评价显示文摘有机紫外吸收剂是一类“准持久性”有机污染物,广泛存在于珊瑚礁区的各种环境介质中,并会对珊瑚健康产生威胁。近年来,随着珊瑚礁退化加重,珊瑚礁区有机紫外吸收剂污染问题逐渐受到重视。综述了近年来有机紫外吸收剂在全球不同珊瑚礁区水体、沉积物和珊瑚组织中的污染水平、时空分布特征,并评估了有机紫外吸收剂对珊瑚礁生态系统的危害程度。结果表明,每个海域的有机紫外吸收剂种类及浓度不尽相同,海水中的有机紫外吸收剂浓度总体处于ng/L至mg/L水平,并且近岸海域污染通常高于远岸海域污染,夏季污染通常高于其他季节污染。在二苯酮-1(BP-1)、二苯酮-3(BP-3)、二苯酮-8(BP-8)、对甲氧基肉桂酸辛酯(EHMC)、奥克立林(OC)等5种有机紫外吸收剂中,BP-3对珊瑚具有最大威胁,对88%以上的所调研珊瑚礁的珊瑚具有高生态风险,而BP-1、BP-8、EHMC、OC只在少部分珊瑚礁区对珊瑚具有中低生态风险。裴继影 王明威 庞可 胡俊杰 余克服 张瑞杰 2023中国环境监测2023,39,4:0
15Environmental factors affecting regional differences and decadal variations in the buried flux of marine organic carbon in eastern shelf sea areas of China显示文摘To characterize environmental factors controlling decadal-scale variations in the buried flux of marine organic carbon(BFC_(m))in the eastern shelf sea areas of China(ECSS),four well preserved sediment cores collected from the central Yellow Sea mud(CYSM)area,the Yellow Sea Coastal Current(YSCC)area and the Changjiang River Estuary(CRE)were investigated in this study.In the CYSM,variations in BFC_(m) were found to be dependent on variations in primary productivity and to exhibit a cyclical trend possibly related to fluctuations in the Pacific Decadal Oscillation(PDO)and the East Asian winter monsoon index(EAWM).In the YSCC,BFC_(m) likewise depends on primary productivity.Prior to the 1950s,variations in BFC_(m) were similar to that of the EAWM.After the 1950s,BFC_(m) increased rapidly and exhibited maximum values in the surface layer,consistent with an increase in primary productivity caused by the input of terrestrial nutrients associated with China’s economic development.In the CRE,variations in BFC_(m) were affected by several competing factors making it difficult to identify clear relationships between variations in BFC_(m) and primary productivity.In contrast,long-term variability in BFC_(m) is more similar to changes in the Changjiang River sediment load.Thus,it is speculated that the construction of dams along the Changjiang River may be the main cause of variations in BFC_(m) in this area.Given the disproportionate effects of human activities on marine environments and decadal variations in BFC_(m) in the ECSS,careful attention should be paid to regional differences in organic carbon preservation and environmental changes lest estimates of these values be made imprecise or inaccurate.Qian Yang Keming Qu Shu Yang Yao Sun Yan Zhang Mingying Zhou 2021Acta Oceanologica Sinica2021,40,6:0
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