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国家重点基础研究发展计划(2010CB428901)

作品数:37 被引量:242H指数:10
相关作者:赵美训邢磊张海龙向荣李先国更多>>
相关机构:中国海洋大学中国科学院青岛海洋地质研究所更多>>
发文基金:国家重点基础研究发展计划国家自然科学基金中国科学院知识创新工程更多>>
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Sources and Transport of Terrigenous Organic Matters Along the East China Sea Inner Shelf: Insights from Lignin and Alkane Biomarkers
2021年
The area of East China Sea(ECS)inner shelf is an important sink of suspended particulates from Yangtze River(YR)and materials originated from YR basin.In this study,the parameters of lignin and alkane biomarkers in surface sediment samples from ECS inner shelf were determined to distinguish the sources and to trace the transport of terrigenous organic matters in the region.Our dataset showed that total alkanes with carbon numbers from 10 to 38(T-alkanes)were significantly correlated to both TAR(terrigenous/aquatic ratio)and HMW/LMW(the ratio of high molecular weight to low molecular weight alkanes)(r=0.88,P<0.05 for both),indicating that the majority of T-alkanes was predominantly originated from terrestrial sources,and T-alkanes are important constituents of terrestrial organic matters in the study area.The area was probably affected by petroleum pollution to a certain degree,as indicated by the values of carbon preference index(CPI),odd-over-even carbon number predominance(OEP)and the ratio of pristane to phytane(Pr/Ph).The values of Pr/n-C_(17) and Ph/n-C_(18) suggested a strong reductive sedimentary condition in the region with no obvious biodegradation.The content of eight lignin phenols(Σ8)decreased from the coast to the open sea,indicative of riverine input and hydrodynamic transport of terrigenous organic matters.Lignin degradation parameters presented an increasing trend from the coastline toward the open sea.The lignin vegetation parameters and alkane index(AI)suggested the predominance of non-woody angiosperms in the YR basin.The obvious correlation betweenΛ8(Σ8 normalized to 100 mg organic carbon),TAR and HMW/LMW reveals the significantly concurrent input of lignin and alkanes from terrestrial sources.
LIU XiaojieHAO TingFENG LijuanJI YinliWANG QianqianZHANG DahaiPAN GangGAO XianchiMENG ChunxiaLI Xianguo
关键词:BIOMARKERLIGNINALKANES
Determination of Lignin in Marine Sediment Using Alkaline Cupric Oxide Oxidation-Solid Phase Extraction-on-Column Derivatization-Gas Chromatography被引量:10
2013年
Lignin serves as one of the most important molecular fossils for tracing Terrestrial Organic Matters (TOMs) in marine environment. Extraction and derivatization of lignin oxidation products (LOPs) are crucial for accurate quantification of lignin in marine sediment. Here we report a modification of the conventional alkaline cupric oxide (CuO) oxidation method, the modification consisting in a solid phase extraction (SPE) and a novel on-column derivatization being employed for better efficiency and reproducibility. In spiking blanks, recoveries with SPE for the LOPs are between 77.84% and 99.57% with relative standard deviations (RSDs) ranging from 0.57% to 8.04% (n=3), while those with traditional liquid-liquid extraction (LLE) are from 44.52% to 86.16% With RSDs being from 0.53% to 13.14% (n=3). Moreover, the reproducibility is greatly improved with SPE, with less solvent consumption and shorter processing time. The average efficiency of on-column derivatization for LOPs is 100.8%±0.68%, which is significantly higher than those of in-vial or in-syringe derivatization, thus resulting in still less consumption of derivatizing reagents.Lignin in the surface sediments sampled from the south of Yangtze River estuary, China, was determined with the established method. Recoveries of 72.66% to 85.99% with standard deviation less than 0.01mg/10g dry weight are obtained except for p-hydroxybenzaldehyde. The lignin content ∑8 (produced from 10g dry sediment) in the research area is between 0.231 and 0.587mg. S/V and C/V ratios (1.028 ± 0.433 and 0.192±0.066, respectively) indicate that the TOMs in this region are originated from a mixture of woody and nonwoody angiosperm plants; the high values or (Ad/Al)v suggest that the TOMs has been highly degraded.
ZHANG TingLI XianguoSUN ShuwenLAN HaiqingDU PeiruiWANG Min
关键词:LIGNIN
Biomarker evidence for changes in terrestrial organic matter input into the Yellow Sea mud area during the Holocene被引量:8
2016年
We present lipid biomarker records of two cores (ZYI and ZY3) from the central South Yellow Sea mud area to investigate the changes in sources and transport processes of the sedimentary organic matter (OM) throughout the Holocene. Based on the analysis of marine biomarker content (EPB (Phytoplankton Biomarker, total content of brassicasterol, dinosterol and C37-alkenones) and crenarchaeol), and terrestrial biomarkers (En-alkanols and brGDGTs) as well as TMBR' and BIT index values, the marine organic matter (MOM) and terrestrial organic matter (TOM) deposition history was reconstructed. Changes in TOM and MOM were related to variations in land vegetation density and marine productivity, as well as transport processes dominated by the oceanic circulation system. The marine biomarker contents from the South Yellow Sea have generally in- creased throughout the Holocene, indicating that the increased MOM contents were mainly controlled by the strengthening of the circulation system. The terrestrial biomarkers, on the other hand, were more variable, indicating more complex influence of TOM burial in the Yellow Sea. During the Early Holocene (7200-6000 cal yr BP), the moderate TOM input revealed by the terrestrial proxy records may result from abundant land source supply by strong river transport despite the lack of transport via circulation system. The Mid-Holocene (6000-3000 cal yr BP) was characterized by decreased terrestrial biomarker contents. The balance between the decrease in land source supply and increase of transportation by the current system of the TOM resulted in the lower but stable contents of TOM. During the Late Holocene (3000 cal yr BP to present), the TOM deposition in the South Yellow Sea increased as the current system was further enhanced and thus transported more TOM to the central South Yellow Sea, although the land supply of TOM was further reduced.
WU PengXIAO XiaoTongTAO ShuQinYANG ZuoShengZHANG HaiLongLI LiZHAO MeiXuna
关键词:HOLOCENEBIOMARKER
南黄海表层沉积物粒度端元反演及其对沉积动力环境的指示意义被引量:33
2015年
应用端元分析模型对南黄海表层沉积物粒度数据进行了反演,分离出四个端元.根据各端元频率分布曲线及平面分布特征,结合南黄海沉积动力格局,分析了各端元与研究区物源和水动力环境的对应关系.端元1和端元2反映了海洋动力过程对陆源沉积物的输运和分选,端元3和端元4反映了海洋动力对残留砂的改造.南黄海海洋锋面主要对陆源较粗颗粒沉积物的输运有影响,陆源较粗颗粒沉积物基本不能跨越山东外海海洋锋面.陆源细颗粒沉积物受海洋锋面影响较小,并在潮汐动力条件较弱的南黄海中部大量沉降,构成南黄海中部泥质区主体.南黄海中部细颗粒沉积物可能有西北和西南两个不同物源方向,其北部沉积物主要来自沿岸流输运跨越锋面后的黄河沉积物的细颗粒部分,西南部沉积物主要来自跨越苏北海洋锋面具有长江和黄河混合物源的苏北沿岸沉积物的细颗粒部分.和直接利用沉积物粒度数据研究沉积动力环境的传统方法相比,利用沉积物粒度端元分析方法分离出的沉积物不同端元分析区域沉积动力环境效果更好.
张晓东季阳杨作升王中波刘东生贾培蒙
关键词:南黄海沉积物粒度
木质素的生物降解及其对陆源有机碳指示作用的影响被引量:6
2012年
海洋沉积物中的木质素是陆源有机碳输入的良好标志物,但在迁移埋藏的过程中会发生生物降解,对其指示作用产生影响。本文简要介绍了木质素的结构、指示参数、降解木质素的微生物和降解机理,重点介绍了生物降解过程中木质素参数的变化及对其指示作用的影响,并总结了解决这一问题的方法,指出必须采用多种方法的结合,获取更多的信息才能保证结果的正确性。
兰海青李先国张婷孙书文
关键词:木质素生物标志物生物降解白腐菌
End member inversion of surface sediment grain size in the South Yellow Sea and its implications for dynamic sedimentary environments被引量:7
2016年
Four end members were inverted from surface sediment grain size data from the South Yellow Sea by using the end member(EM) model. The sediment provenance and hydrodynamic meanings of each EM were discussed based on the frequency and spatial distributions of the EMs. EM1 and EM2 reflect the dynamic transport and sorting processes of the terrigenous sediment, and EM3 and EM4 reflect the modification of relic sand. The ocean front mainly affected transport of relatively coarse terrigenous sediment in the South Yellow Sea, and the fine terrigenous sediments were generally unaffected by the ocean front. Fine sediment could pass through the ocean front and deposit in the central South Yellow Sea under weak tidal condition to form most part of the Central Yellow Sea Mud(CYSM). The CYSM extended toward northwest and southwest. The sediment in the north part of the CYSM mainly consisted of sediment from the Yellow River(Huanghe) in the northwest, and the sediment in the southwest part of CYSM mainly consisted of Subei coastal sediments from both the Yangtze River(Changjiang) and the Yellow River. Compared to the traditional method of sediment grain size analysis, the EM model can determine the EMs and provide better explanations of the sediment provenance and dynamic regional sedimentary environment in the study area.
ZHANG XiaoDongJI YangYANG ZuoShengWANG ZhongBoLIU DongShengJIA PeiMeng
关键词:SEDIMENT
梯烷脂在海洋厌氧氨氧化研究中的应用进展被引量:1
2013年
厌氧氨氧化反应是指NH4+在缺氧条件下被NO2-氧化释放N2的过程,发生在厌氧氨氧化菌的厌氧氨氧化体中,是海洋中N2的重要来源。梯烷脂是厌氧氨氧化菌特有的一种脂类,可以作为一种指示海洋环境中厌氧氨氧化活动的生物标志物。简单介绍了厌氧氨氧化过程的发现、厌氧氨氧化菌的分类和梯烷脂的结构与性质,并总结了影响梯烷脂含量与分布的因素。文中还对梯烷脂作为厌氧氨氧化菌生物标志物在氮循环研究中的应用做了简要介绍,并对梯烷脂在重建古环境中的厌氧氨氧化活动与氮循环过程及气候变化方面的应用进行了展望。
曹亚俐赵宗山赵美训
关键词:厌氧氨氧化菌生物标志物氮循环厌氧氨氧化
Grain size records reveal variability of the East Asian Winter Monsoon since the Middle Holocene in the Central Yellow Sea mud area,China被引量:41
2012年
Three cores (ZY-1, ZY-2 and ZY-3) retrieved from the Central Yellow Sea mud (CYSM) were analyzed in sensitive grain size and AMS J4C dating to reconstruct the history of the East Asian Winter Monsoon (EAWM) since the Middle Holocene in the study area. The results show that these data provide a continuous history of the EAWM over the past 7.2 ka and that the EAWM can be divided into three periods: strong and highly fluctuating during 7.2-4.2 ka BP; moderate and relatively stable during 4.2-1.8 ka BP; and weakened during 1.8-0 ka BP. Compared with the East Asian Summer Monsoon (EASM) recorded in the previous studies, the evolutionary history of the EAWM broadly follows the orbital-derived winter insolation with a similar long-term step-decreased trend as the EASM. At the centennial scale, however, the EAWM intensified events correlate well with the EASM weakened events and the North Atlantic climatic variations (Bond events 0 to 5) within the dating error, most likely forced by the reduction of solar irradiance through changes in the oceanic-atmospheric circulation patterns.
HU BangQiYANG ZuoShengZHAO MeiXunYoshiki SAITOFAN DeJiangWANG LiBo
东海沉积物中微生物标志物GDGTs年代际变化及来源被引量:4
2012年
甘油双烷基甘油四醚(Glycerol Dialkyl Glycerol Tetraethers,GDGTs)是近几年来新发现的一类生物标志化合物,基于GDGTs的各种指标以其在指示物质来源以及海洋和陆地古温度重建等方面显示出的巨大应用潜力,逐渐成为古海洋学、古湖沼学和古气候学研究的重要工具。对采自东海陆架区的DH5-1站位(29°28.118′N、123°06.639′E,水深63.5m)的柱状沉积物样品进行了总有机质和GDGTs分析,研究了GDGTs化合物在东海陆架区柱状沉积物样品中的含量和沉积通量变化,并利用δ13 C、C/N以及基于GDGTs化合物的BIT指标讨论了该海区近150年来沉积有机质的来源变化。结果显示,近百年来东亚冬季风的增强,加强了冬季闽浙沿岸流对长江口沉积物的搬运,使得该海区陆源输入量呈增加趋势,但20世纪80年代以来,人类活动的加剧导致营养盐输入的增加,使得海洋生产力提高,沉积有机质中陆源有机质比例下降。
张婷邢磊张海龙李莉赵晓晨陈蔚芳赵美训
关键词:生物标志物
关于醋酸纤维滤膜和聚碳酸酯滤膜测定营养盐和Chl a的对比被引量:3
2016年
本论文采用聚碳酸酯滤膜(0.4μm)和国内测定营养盐常用的醋酸纤维滤膜(0.45μm)过滤不同站位海水样品测定营养盐和Chl a,探究两种滤膜之间的区别。营养盐的对比结果表明,采用未干燥的醋酸纤维滤膜和聚碳酸酯滤膜过滤的亚硝酸盐、铵氮、磷酸盐和硅酸盐均不存在显著性差异,硝酸盐存在显著性差异但差别小于2%,因而两种滤膜均适用于海水溶解态营养盐的过滤。干燥后的醋酸纤维滤膜过滤速度慢,且过滤过程中会引入较高的铵氮。Chl a的对比结果表明,聚碳酸酯滤膜更加适合Chl a的测定,醋酸纤维滤膜的截留效率明显低于聚碳酸酯滤膜,这可能是由于该滤膜无法完全截留小粒径的浮游植物。
张云燕刘素美宋国栋
关键词:营养盐CHL
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