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| 1 | Bio-Organic Geochemistry research in China: Advances,opportunities and challenges显示文摘The discipline of 'Bio-Organic Geochemistry' is a cross research field between biogeochemistry and traditional organic geochemistry, which focuses on geochemical processes related to the biosynthesis of organic molecules(particularly lipids) by(micro) organisms, organic matter production by primary producers, degradation of organic matter by microbial processes recorded by retainable lipid biomarkers, and organic proxies for studies of paleo-climate, paleo-environments, paleoecology and Earth evolution. This field aims to go beyond the traditional petroleum-oriented Organic Geochemistry by integrating with biogeochemical concepts concerned mostly with biomolecules from cellular material such as DNA and lipids. A formal Chinese organization in Bio-Organic Geochemistry was established in 2012 when the first conference was held in Guangzhou. This organization has witnessed rapid growth over the past six years with focused research addressing organic proxies in paleoclimate and paleoenvironmental applications, with particular rapid development in glycerol dialkyl glycerol tetraethers-derived proxies. Most progresses in China so far are made following or paralleling the international trend in biogeochemical studies. Things have begun to change with China's ambitious initiatives in several bio-geo programs such as the Ocean Deep Drilling Program of China, the Microbial Hydrosphere Program, the Deep Carbon Observatory, and the Microbiome Program. Looking forward in the 21 st Century, the growing Chinese research community in Bio-Organic Geochemistry faces grand opportunities and challenges as Chinese scientists propel themselves toward global research frontiers. | Chuanlun ZHANG Ping'an PENG Meixun ZHAO Shucheng XIE Jianfang CHEN Weiguo LIU | 2018 | Science China Earth Sciences2018，61，12： | 2 |
| 2 | 生物标志物重建全新世以来黄海浮游植物群落结构时空变化显示文摘现有研究对全新世以来浮游植物群落结构在黄海的时空变化还缺乏深入认识,针对这一问题,本研究分析了C02和N05岩心中的生物标志物,并结合已发表岩心生物标志物数据,重建黄海全新世以来浮游植物群落结构的时空变化。在早全新世,长链烯酮相对比例(A/∑PB)和菜子甾醇相对比例(B/∑PB)低,甲藻甾醇相对比例(D/∑PB)高。较高的陆源有机质指标(TMBR′)值说明黄海浮游植物群落结构主要受陆源营养盐输入控制。在中全新世,A/∑PB升高,B/∑PB和D/∑PB减小,是由于高温高盐的黄海暖流入侵有利于颗石藻生长。在空间分布上,以ZY3、ZY2、ZY1和YE-2 4个站位组成的35.5°N断面区域烯酮相对比例大幅升高,西部站位C02与东部N05烯酮比例小幅上升,这是由于黄海暖流主轴流经35.5°N断面,该区域主要受黄海暖流控制,而其他区域仍受陆源营养盐输入控制。从早全新世到中全新世,B/∑PB(D/∑PB)高值相继出现在N05(C02)和C02(N05)区域,这是由于2个站位的控制因素不同,可能与黄海暖流主轴摆动和陆源物质的搬运有关。在晚全新世,A/∑PB继续升高,B/∑PB和D/∑PB减小。晚全新世东亚冬季季风增强使黄海环流体系加强,黄海暖流对颗石藻的影响进一步扩大。甲藻甾醇与菜子甾醇的相对比例(D/B)升高,可能是由于东亚冬季季风增强,使含有更多氮元素的大气物质沉降到黄海,有利于甲藻对硅藻的竞争。 | 吴珺洁 袁子能 向荣 张海龙 肖晓彤 赵美训 | 2017 | 海洋学报2017，39，10： | 1 |
| 3 | 植物与土壤中醇类化合物对高寒草甸退化指示作用初探显示文摘醇类化合物是一类重要的生物标记物,被广泛用于土壤及沉积物中有机物质的溯源。为探究醇类化合物对高寒草甸退化指示作用规律,采用野外调查与气相色谱质谱联用(GC-MS)分析方法,对高寒草甸植物与土壤中醇类进行测定和分析。结果表明,高寒草甸植物中醇种类数为2~21,碳数为4~37,不饱和醇种类数高于饱和醇。退化土壤中检出9-甲基-10-顺式十五烯-1-醇、2-亚甲基-5α-胆甾烷-3β-醇、1-三十七烷醇,而在未退化土壤中未检出。高寒草甸中植物和土壤醇的种类大小关系为退化植物>退化土壤>未退化植物>未退化土壤,植物和土壤中相同的醇有很强的相关性(R2=0.871)。植物和土壤醇类的分布特征及相关性分析表明,醇类化合物可以用作标记物来指示高寒草甸退化。 | 段中华 全小龙 乔有明 史惠兰 裴海昆 郑元铭 | 2018 | 草业科学2018，35，5： | 1 |
| 4 | Ancient water wells reveal a prolonged drought in the lower Yellow River area about 2800 years ago显示文摘Proxy records from the North Atlantic realm reveal that large and rapid cooling known as the Bond events continued into the Holocene [1],repeatedly punctuating what is conventionally thought to have been a relatively stable climate.Given that the Holocene is the most recent interglacial period that has spurred the development of modern societies,scrutinizing climate variabil- ity during this period is important not only for predicting the trend of future climate changes,but also for better understanding the driving forces behind the rise and fall of ancient civilizations. | Shiyong Yu Xuexiang Chen Xiuling Liu Zhen Fang Junfeng Guo Senyang Zhan Hui Fang Fahu Chen | 2018 | Science Bulletin2018，63，20： | 1 |
| 5 | 中全新世以来南黄海中部沉积过程——基于岩心粒度和有机质指标显示文摘海陆交互作用下的南黄海沉积环境复杂,其沉积机制一直是古海洋研究的重点和难点。本文以取自南黄海中部泥质区的Z1岩心为载体,对196个样品的粒度和整体有机质指标(TOC、TN、TOC/TN和δ13Corg)进行了详细分析,并对5个层位进行AMS14C年龄测定,分辨率高达11 a/cm。研究结果显示,6.1 ka BP以来南黄海中部沉积过程可分为3个阶段:(1)6.1~5.2 ka BP,沉积物粒度较粗,以残留砂和陆源粗粒物质为主,有机质含量较低且主要为陆源输入,本阶段多受东亚季风强盛的影响,动荡海洋环境下有机质保存效率低,大量陆源输入冲淡作用显著;(2)5.2~3.9 ka BP,沉积物粒度变细且波动较大,有机质呈增加趋势且以海源为主,主要受东亚冬季风减弱的影响,海源有机质含量增加,与黄海暖流影响增强有关;(3)3.9~0 ka BP,沉积物粒度最细且相对稳定,有机质含量继续增加,直至1.9 ka BP趋于稳定,主要受现代环流系统和东亚冬季风影响。结果表明,南黄海粒度和整体有机质指标变化过程复杂,显示中全新世以来南黄海中部泥质区沉积环境演化的复杂性。本研究获得了南黄海高分辨率的沉积环境演化记录,不仅为沉积机制研究提供更多数据支撑,还可为区域古气候和古海洋演化提供关键的指示证据。 | 皮仲 李铁刚 类彦立 | 2019 | 海洋学报2019，41，11： | 1 |
| 6 | Spatial Distributions and Potential Sources of Long Chain(C_(30),C_(32)1,15-)Alkyl Diols in Surface Sediments from Eastern China Marginal Seas显示文摘Long chain alkyl diols have shown important potential for the reconstruction of sea surface temperature,productivities and upwelling conditions in marine or lacustrine environments.However,little is known about the distribution and sources of the diols in eastern China marginal seas(CMS),which are areas of important organic carbon sink.Here the contents of C_(30) and C_(32)1,15-diols were analyzed in 181 surface sediments from eastern CMS.The similar distribution pattern and strong linear correlation between C_(30) and C_(32) diols indicated that they had similar biological source,with a dominance of C_(30) diol.Their contents ranged from 7-2726 ng g^(-1) for C_(30) diol and 5-669 ng g^(-1) for C_(32) diol,and both showed higher values mainly in the mud area of the Yellow Sea,while the TOC normalized contents showed a more obvious seaward increasing trend.The similar distribution pattern and significant positive correlation between diols and the other marine biomarkers(brassicasterol,dinosterol,C_(37) alkenones) indicated C_(30) and C_(32) diols in eastern CMS were mainly from marine algae.This conclusion was also supported by principal component analysis(PCA).Our results also showed that sediment diol contents were generally related to marine productivity,suggesting that diols could be applied for marine productivity reconstruction in eastern CMS. | YU Meng ZHANG Hailong LI Li ZHAO Meixun | 2018 | Journal of Ocean University of China2018，17，5： | 0 |
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