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| 1 | 中国地区湖泊沉积物中^137Cs分布特征和环境意义显示文摘^(137)Cs是人为放射性核素,长期以来,它在沉积物岩芯剖面中的分布被用作近代沉积物定年的重要手段之一.本文全面收集了关于我国湖泊沉积物中^(137)Cs分布的研究文献,对它们进行了综合分析和对比;试图揭示中国湖泊沉积物中^(137)Cs剖面分布特征和环境意义:结合我国湖泊分区和特点,分别讨论了我国5大湖区^(137)Cs的总体特征和主要影响因素.研究表明:影响^(137)Cs沉积剖面分布的因素,除了纬度和海拔外,还应与当地的地貌特征、降雨量、植被状况和人类活动有关;全球核大气沉降是中国湖泊沉积物的^(137)Cs剖面分布最主要的来源,同时我国早期的大气核试验和前苏联切尔诺贝利核泄漏事件对我国部分地区^(137)Cs分布可能有一定的影响. | 曾理 吴丰昌 万国江 郑建 | 2009 | 湖泊科学2009，21，1： | 31 |
| 2 | 东营凹陷牛38井沙河街组烃源岩生排烃评价显示文摘东营凹陷牛 38井沙河街组三段烃源岩从沙三下亚段向沙三中 上亚段为一从高水位深湖相向低水位前三角洲相发展的沉积旋回 ,该沉积环境控制从下向上发育不同类型的有机质。相应地 ,该段烃源岩品质从下向上变差 ,其中沙三中亚段上部及沙三中亚段中部烃源岩产烃能力小 ,沙三下亚段烃源岩整体品质好 ,局部存在优质烃源岩。其优劣性体现了在该段烃源岩中 ,Ⅰ型干酪根具有高的生产力 ,而Ⅲ型、Ⅱ2 型干酪根生烃潜力很低 ,基本为无效有机质。计算结果显示不同数据点的烃源岩单位质量原始生烃潜量可相差 3个数量级 ,体现了烃源岩存在强烈的非均质性。有机碳的非均质性分布为其提供了物质基础 ,而湖盆的旋回式沉积及湖平面的波动性变化是其内在原因。同时 ,本文也提供一种计算生排烃量的新方法 ,结果表明该方法较为有效可行。 | 陈中红 查明 金强 | 2004 | 地质科学2004，39，3： | 24 |
| 3 | 云南腾冲青海湖泊沉积物物化参数的特点、环境意义及末次冰消期以来气候环境变化显示文摘根据对云南腾冲青海湖泊沉积钻孔样品的粒度特征、总有机碳、碳酸盐、磁化率及年代学分析测试,探讨了各指标的变化特点及其环境指示意义,指出了云南高原湖泊沉积物化指标的特殊性及其变化特点.在此基础上,重建了云南腾冲地区末次冰消期(15830a B.P.)以来沉积环境与气候干湿变化历史.通过青海沉积物年代序列的重建和综合各物化参数分析得出,云南腾冲地区自15830a B.P.以来总体呈现冷湿-温湿-暖干-温和偏干的气候演变过程,并可分为4个阶段,即15830~12790a B.P.气候温凉偏湿;12790~4680a B.P.为温暖湿润期,湖泊水位高,气候湿暖,降水多;4680~312a B.P.气候特征呈现出从温湿到暖干气候逐渐演化,降水减少,湖泊水位下降;312a B.P.以来气候特征为前期温和湿润,后期具有暖干化特征,反映了近几十年来全球气候变暖导致的气候变化趋势并叠加了研究区人类活动对区域环境的影响. | 刘亚生 常凤琴 张虎才 牛洁 段立曾 李华勇 文新宇 吴汉 | 2015 | 第四纪研究2015，35，4： | 24 |
| 4 | Lake sediment records on climate change and human activities since the Holocene in Erhai catchment, Yunnan Province, China显示文摘According to high-resolution analyses on multi-proxy of sediment core from the Er- hai Lake, Yunnan Province, the sequence of climatic and environmental change since the Holo- cene has been reconstructed based on accurate dating. The results show that climate had tran- sited from cold-wet to warm-wet during ca. 12950-8399 aBP in this area, and the transition happened in ca. 10329 aBP. Due to the enhancing southwest Asian monsoon and increasing precipitation, the lake-level of the Erhai Lake began to rise after ca. 10329 a BP. Climate in the catchment was warm and wet during the mid-Holocene, and the warmest stage appeared in ca. 8399-6371 a BP. The lake-level descended in the mid-Holocene because of the decrease of effective moisture in the basin. Human activities appeared in ca. 6371 a BP, and the initial man- ner mainly focused on deforestation. Up to ca. 2139 a BP, due to the amount of immigration into this area, the cultivation was developed widely, which was followed by mining (coal mine). | R. Matsumoto | 2005 | Science China Earth Sciences2005，48，3： | 22 |
| 5 | 柴达木贝壳堤剖面元素地球化学与环境演变显示文摘通过对柴达木盆地察尔汗古湖贝壳堤沉积物中酸溶与残留(酸不溶)组分中常、微量元素及其元素对的分析,并结合酸溶与残留组分中常、微量元素相关性对比,讨论了贝壳堤剖面元素地球化学指标和沉积环境之间的关系,指出酸溶组分中的常量、微量元素及其元素对可以作为湖泊和古气候演化良好的代用指标;残留组分中的元素及元素对与原岩及其风化程度紧密相关,因此,酸溶组分与残留组分中的常量和微量元素在对于环境响应模式存在一定差异,应该将二者分开研究以避免对元素所携带环境信号解译的偏差。根据元素地球化学指标重建了43.5~22.4cal.kaB.P.(39.7~17.5kaB.P.14C年代)柴达木盆地察尔汗古湖高湖面期间古气候与环境演变过程:43.5~31.7kaB.P.期间酸溶组分中元素含量总体较低,残留组分中元素含量相对较高,且湿润度值((Fe2O3+Al2O3)/(MgO+CaO),或H)处于高值段,而Ca/Mg,Fe/Mn和Rb/Sr则处于低值段,指示了温暖湿润的气候环境,古湖泊水体增加;其中37.8~31.7kaB.P.期间酸溶组分中元素含量多出现最低值,残留组分中元素含量富集,H值较高,而Ca/Mg,Fe/Mn和Rb/Sr此段均值最小,表明此时为环境的最适宜期,此期间降雨充沛,湖泊处于高湖面;在31.7~22.4kaB.P.期间酸溶组分中元素含量普遍较高,残留组分中元素含量相对富集,且Ca/Mg,Fe/Mn和Rb/Sr处于高值段波动,H值处在低值段,指示气候环境恶化,降水逐渐减少,古湖泊水体萎缩;在约22.4kaB.P.气候快速恶化,形成石盐结晶,高湖面历史结束。柴达木盆地该期高湖面及其演化过程可与腾格里沙漠和额济纳盆地-巴丹吉林沙漠高湖面记录进行对比,揭示了大范围气候变化的历史。 | 张文翔 张虎才 雷国良 杨伦庆 牛洁 常凤琴 杨明生 樊红芳 | 2008 | 第四纪研究2008，28，5： | 20 |
| 6 | 内蒙古西部额济纳古湖小狐山剖面有机质与碳酸盐组成及其古环境意义显示文摘通过对内蒙古西部额济纳古湖小狐山剖面沉积物中总有机碳(TOC)、总氮(TN)和碳酸盐(CaCO_3)含量的测定,分析了沉积物中有机碳来源和无机碳酸盐成因,结果表明在额济纳古湖相沉积物中TOC与TN含量呈同步变化规律,TOC/TN(9.91~10.16)较稳定,其有机质为湖泊自生藻类和外源维管束植物共同提供。沉积物中有机质含量受温度、降雨量变化控制,当气候暖湿时,沉积物中有机碳含量高,气候冷干则有机碳含量低,因此,有机碳含量是所研究剖面气候温湿与干旱(冷)的有效环境指标。湖泊自生碳酸盐含量则由湖区有效湿度和生物量的共同控制,其稳定碳同位素指示有效湿度的大小。粒度,特别是小于2μm组分含量与水动力和搬运介质相关,其组分含量大于5%时为湖相沉积且随其含量增加指示水深加大。根据沉积物中有机碳、碳酸盐、无机碳同位素和粒度,并结合剖面岩相特征,探讨了研究区该时段(按剖面深度划分)气候变化和湖泊演化历史:?~38.15^(14)C kaB.P.(1039~9 49cm)湖区气候为冷干环境特征,风沙盛行;38.15~31.73^(14)C kaB.P.(949~780cm)气候环境逐步改善,降水量增加,湖泊开始发育并到达湖泊高水位阶段;31.73~22.79^(14)C kaB.P.(780~482cm)湖泊水位有所下降,气候有明显的波动,但仍维持在较高的水位上,湖区环境仍为暖湿气候;22.79~17.37 ^(14)C kaB.P.(482~304cm)气候开始变冷变干,湖区有效适度持续减小,湖泊退缩;17.37~14.00 ^(14)kaB.P.(304~178cm)湖泊退出研究点,区域有效湿度小,风沙盛行,存在短暂气候事件,造成暂时性流水;14~4 ^(14)C kaB.P.(178~0cm)湖泊开始再度扩张、水位上升,湖水变淡,到该阶段的后期气候又一次发生转变,湖区再度成为干旱环境,有效湿度减小,湖泊开始萎缩、直至消失。 | 杨伦庆 张虎才 类延斌 雷国良 张文翔 常凤琴 庞有智 | 2009 | 第四纪研究2009，29，2： | 19 |
| 7 | Humid Little Ice Age in arid central Asia documented by Bosten Lake, Xinjiang, China显示文摘Short sediment cores retrieved from Bosten Lake, the largest inland freshwater lake in China, were used to explore humidity and precipitation variations in arid central Asia during the past millennium. The chronology of the cores was established using 137Cs, 210Pb and AMS 14C dating re- sults. Multi-proxy high-resolution analysis, including pollen ratios of Artemisia and Chenopodiaceae (A/C), carbonate content and grain size, indicates that the climate during the past millennium can be divided into three stages: a dry climate between 1000―1500 AD, a humid climate during the Little Ice Age (LIA) (c. 1500―1900 AD), and a warm dry period after 1900 AD. On centennial timescales, the climate change in northwestern China during the past 1000 years is characterized by oscillations between warm-dry and cold-humid climate conditions. All the proxies changed significantly and indi- cate increased precipitation during the LIA, including increased pollen A/C ratios and pollen concen- trations, decreased carbonate content and increased grain size. The humid period during the LIA re- corded by the Bosten Lake sediments is representative of arid central Asia and is supported by nu- merous records from other sites. During the LIA, the water runoff into the Keriya River and Tarim River in the Tarim Basin increased, while the ice accumulation in the Guliya ice core increased. Additionally, the lake levels of the Aral and Caspian Sea also rose, while tree-ring analysis indicates that precipita- tion increased. We hypothesize that both the lower temperature within China and the negative anomalies of North Atlantic Oscillation (NAO) during this period may have contributed to the humid climate within this area during LIA. | J. A. Holmes | 2006 | Science China Earth Sciences2006，49，12： | 14 |
| 8 | 近8ka来云南洱海湖泊沉积记录的气候变化与夏季印度季风强弱变化的关系显示文摘根据洱海湖泊沉积物有机碳稳定同位素、元素、磁化率记录,近8 ka来西南季风区洱海古气候演化可以分为9个阶段,气候变化以暖干-冷湿交替为主,暖干气候阶段西太平洋副热带高压控制西南地区的频率增加,夏季印度季风路径偏向西亚、中亚和青藏高原西部,包括洱海在内在云南高原气候暖干明显;冷湿气候阶段,副热带高压偏弱向东撤退,印度季风路径移向中国西南地区,降水增加,造成气候冷湿.湖泊沉积物记录的洱海流域人类耕作农业历史最早出现在5 ka BP左右. | 张振克 沈吉 羊向东 朱育新 夏威岚 吴瑞金 | 2008 | 亚热带资源与环境学报2008，3，3： | 13 |
| 9 | 滇池700年来气候变化与人类活动的湖泊环境响应研究显示文摘通过对滇池剖面沉积物质量磁化率、δ18O、δ13C同位素、粒度、矿物成分、CaCO3、有机质、铁、粘土矿物元素的测定,利用210Pb测年,恢复了滇池地区近700年来的气候变化。通过对湖泊沉积记录的分析,发现滇池经历了两个高湖水期和一个低湖水期,具有明显的200年气候周期性;本区气候变化具有冷湿-暖干的气候变化特征。滇池沉积记录包含了人类活动的信息,揭示了人类疏挖海口河,改变了湖泊沉积速率;最近十几年,工农业活动污染物进入湖泊,改变了湖泊的营养度,是滇池迅速富营养化的阶段。 | 陈荣彦 宋学良 张世涛 张子雄 杨伟 | 2008 | 盐湖研究2008，16，2： | 13 |
| 10 | 鄱阳湖盆地的地质演化、新构造运动及其成因机制探讨显示文摘综合鄱阳湖盆地的沉积特征和构造活动特点,并结合钻孔及剖面资料,分析了鄱阳湖盆地在东亚地区中新生代大地构造背景下的地质演化过程,总结了控制鄱阳湖盆地发展的主要断裂构造及其特征以及盆地的中新生代沉积古地理演化,最后进一步根据已有资料,总结了区域主要断裂的第四纪活动性及与地震活动的关系,并探讨析了盆地的成因机制。综合研究认为,在中生代,中国东南部的燕山运动事件使一套大致平行的北东—南西向断裂带形成,并在此时期导致了鄱阳湖断陷,形成鄱阳湖沉积盆地的雏形;之后,随着赣江断裂系活动方式的变化,鄱阳湖盆地经历了复杂的构造演化过程;至第四纪,盆地中部发生整体拗陷并持续接受沉积;全新世中期后,演化成现代鄱阳湖。 | 杨晓东 吴中海 张海军 | 2016 | 地质力学学报2016，22，3： | 11 |
| 11 | Palynological evidence for vegetational and climatic changes from the HQ deep drilling core in Yunnan Province, China显示文摘The high-resolution pollen study of a 737.72-m-long lake sediment core in the Heqing Basin of Yunnan Province shows that the vegetation and climate of mountains around the Heqing Basin went through six obvious changes since 2.780 Ma B.P. Namely, Pinus forest occupied most mountains around the studied area and the structure of vertical vegetational belt was simple between 2.780 and 2.729 Ma B.P., reflecting a relatively warm and dry climate. During 2.729―2.608 Ma B.P., the areas of cold-temperate conifer forest (CTCF) and Tsuga forest increased and the structure of vertical vegetational belt became clear. According to percentages of tropical and subtropical elements growing in low-altitude regions rifely increased, we speculate that the increase of CTCF and Tsuga forest areas mainly resulted from strong uplift of mountains which provided upward expanding space and growing condition for these plants. Thus, the climate of the low-altitude regions around the basin was relatively warm and humid. Between 2.608 and 1.553 Ma B.P., Pinus forest occupied most mountains around the studied area and forest line of CTCF rose, which reflects a moderately warm-dry climate on the whole. During 1.553―0.876 Ma B.P., the structure of vertical vegetational belt in mountains around the studied area became complicated and the amplitude of vegetational belts shifting up and down enlarged, which implies that the amplitude of climatic change increased, the climatic associational feature was more complex and the climate was moderately cold at a majority of the stage. During 0.876―0.252 Ma B.P., there were all vertical vegetational belts existing at present in mountains around the studied area. The elements of each belt were more abundant and complex than earlier. At different periods in the stage vertical vegetational belts occurred as expanding or shrinking, and alternated each other. The amplitude of vegetational belts shifting up and down was the maximum in the whole section. This change suggests that the amplitude of climatic change was evidently larger than earlier, but the frequency reduced and the climatic associational feature was more complex. From 0.252 Ma B.P. to the present, the most time was characteristic of the expanding of Pinus forest and semi-humid evergreen broad-leaved forest (SEBF) in mountains around the studied area, while expanding time of other vegetational belts was very short, which reflects a smaller amplitude of cold and warm fluctuation. On the basis of the six obvious cycles of vegetational and climatic changes, there were still many times of secondary vegetational successions and climatic oscillations. Based on the above analysis, the forcing mechanism of vegeta-tional succession and climatic change in the Heqing Basin is further discussed. It is primarily consid-ered that main influential factors were exterior factors such as orbital parameters, etc., but the uplift of the Qinghai-Tibet Plateau played a very important function for environmental changes in the Heqing Basin at two times obvious increase of vertical vegetational belts and three climatic transitions. | XIAO XiaYun SHEN Ji WANG SuMin XIAO HaiFeng TONG GuoBang | 2007 | Science China Earth Sciences2007，50，8： | 10 |
| 12 | 湘江(株洲段)沉积物重金属污染现状及生态风险评价显示文摘采集湘江(株洲段)9个断面的底泥样品,和1个柱状样品,对重金属(Cu、Pb、Zn、Cd、Ni、Cr、Hg、As)含量进行了检测;并运用地质积累指数法对底泥中重金属进行了生态风险评价。结果表明,该江段底泥已受到较严重的重金属污染,在霞湾断面达峰值。Cu、Pb、Zn、Cd含量为湘江背景值4.6倍~58.8倍,比该江段20世纪80年代均值增高1.71倍~1.96倍;地质积累指数评价结果表明,该江段未受到Ni、Cr的污染;Cd的污染比其他重金属的污染要严重,污染级别为强-极强、极强;重金属的垂直分布表明:大体上,各重金属元素最高值出现在深度0 cm^50 cm,随深度的变化Ni、Cr的含量变化不大。 | 陈小威 刘文华 刘芬 文新宇 郭霞 | 2011 | 环境监测管理与技术2011，23，1： | 10 |
| 13 | 基于CiteSpace和知网数据库的《湖泊科学》创刊30年(1989-2018年)发表论文的文献计量学分析显示文摘湖泊科学是研究湖泊及其流域在人与自然相互作用下对生态系统、环境间的关系的一门交叉学科.为了探究湖泊科学研究的发展与研究前沿,通过对《湖泊科学》创刊30年(1989—2018年)来发表的全部2555篇论文的统计,分析了年发文量与影响因子年际变化趋势,并运用CiteSpace V软件绘制了可视化知识图谱.结果表明:30年来《湖泊科学》年发文量、被引频次及影响因子整体呈稳步增加的趋势,期刊拥有较为稳定与广泛的学术影响力.相关研究范围主要涉及全球气候变化、湖泊生态系统及群落结构、湖泊富营养化等方面,研究区域则多为湖泊分布较广、生态系统较脆弱且环境问题较为突出地区.文献关键词的分析得出了研究热点与趋势的三个阶段. CiteSpace对作者所在机构的分析表明,近10年来,高校已经超过研究所成为期刊作者主体.关键词词频分析表明,“太湖”、“沉积物”、“富营养化”一直是刊发内容的热点,而近10年来,浮游植物及群落结构、三峡水库逐渐成为热点.随着湖泊研究与遥感技术、统计与模拟、环境化学等进一步交叉,湖泊科学研究向着深入化、精细化方向发展.目前,湖泊科学研究已形成了湖泊水文与生态系统、湖泊生态恢复与环境评价、沉积环境与全球变化等较为稳定的研究团队,高校与科研院所成为湖泊研究主体,具有显著的区域性和集聚效应.期刊论文读者下载量统计分析表明,《湖泊科学》官网(www.jlakes.org)已经成为读者阅读和下载论文的主要渠道.根据知网数据库的统计分析,30年来,刊发论文均获得了不同数量的读者引用,单篇最高被引636次,篇均被引24次.期刊高被引论文分析说明,湖泊作为生态环境保护的重要载体,加强湖泊污染问题的预防、湖泊富营养化预测及其生态修复技术等业已成为相关研究的热点与趋势所在.同时,随着全国湖泊流域数据平台的建设与大数据融合,湖泊流域物质交换、人文影响定量评估、健康与管理、湖泊湿地生态系统保护等方面的研究将进一步加快,而湖泊研究成果在区域的应用,将为改善水环境质量,确保区域生态环境安全,为湖泊生态保护及环境改善提供有力支撑. | 陈俊梅 张文翔 刘甜甜 马顺容 李万春 | 2019 | 湖泊科学2019，31，4： | 9 |
| 14 | 黑龙江省五大连池近百年环境变化研究显示文摘2009年6月用重力采样器在黑龙江省五大连池的三池和五池分别采集岩芯钻孔(wdlc-3孔和wdlc-5孔),运用核素^(210)Pb和^(137)Cs进行定年,同时分析了岩芯沉积物的理化指标,包括烧失量(LOI_(550℃))、总磷(TP)、总氮(TN)、粒度、金属元素和磁化率,研究近代五大连池湖泊环境演化过程以及人类活动的影响。结果表明:1920s~1950s,湖泊沉积物中值粒径较大,LOI_(550℃)和TN呈增长趋势,两孔Al和Fe含量呈增长趋势或处于高值阶段,可能与该期人类活动如开垦荒地有关;1950s~1980s,中值粒径较小或呈减少趋势,而TN,Al和Fe及重金属的含量呈增加趋势,人类活动如毁林、毁草开荒开始成为湖泊环境变化的主导因素;1980s~2000s阶段氮、磷增加更为迅速,重金属的含量也呈快速增长趋势,这可能与化肥、农药、含磷物品、含铅汽油的大量使用以及增强的工业活动有关;2000s以来,湖泊主要面临营养水平增加导致的富营养化问题。 | 桂智凡 薛滨 姚书春 魏文佳 | 2011 | 第四纪研究2011，31，3： | 8 |
| 15 | 近300年来岱海流域气候干湿变化与人类活动的湖泊响应显示文摘根据岱海 6 0cm柱状岩芯的磁化率、孢粉、粒度等环境指标的分析结果 ,对历史时期岱海气候干湿变化和人类活动的湖泊记录进行探讨 .岱海湖泊沉积记录近 30 0年来的气候干湿变化可划分七个阶段 ,与历史记载有较好的一致性 ;频率磁化率高值段对应气候偏湿阶段 ,低值对应气候偏干阶段 .人类活动特别是人口增加和土地开垦 ,加剧流域水土流失 ,导致湖泊沉积物中细颗粒组分增加 ,频率磁化率升高 ;孢粉Ulmus的变化受流域人口增加的影响 。 | 张振克 吴瑞金 | 2001 | 首都师范大学学报(自然科学版)2001，22，3： | 8 |
| 16 | 东营凹陷沙河街组湖相烃源岩的组合特征显示文摘 | 朱光有 金强 张水昌 戴金星 张林晔 李剑 | 2004 | 地质学报2004，78，6： | 6 |
| 17 | 黄河下游历史时期环境变化的烧失量记录显示文摘基于精确14C测年,对黄河下游地区湖泊沉积物岩芯的烧失量进行了分析,结合历史文献资料重建了该区域的气候环境演变历史.研究表明,黄河下游地区沉积物烧失量指示了数次冷暖干湿的大环境变化:2400-1600aBP期间,气候较为温暖,后期转冷;1600-1000aBP期间,气候波动较为复杂,间或有冷暖交替现象;1000aBP至今,气候以暖湿为主,中期有较大波动. | 吴金甲 陈诗越 姚敏 姚昕 于世勇 陈影影 | 2014 | 安徽师范大学学报(自然科学版)2014，37，3： | 5 |
| 18 | The orbital scale evolution of regional climate recorded in a long sediment core from Heqing,China显示文摘Based on the analysis of carbonate content and loss on ignition for a long sediment core (737 m in length) drilled in Heqing, the orbital scale evolution of the Southwest Monsoon is revealed, by using overlapped spectral analysis and filter methods. It is shown that the obliquity cycle and precession cycle are the key factors for the Southwest Monsoon evolution and that the change of the global ice volume and the uplift of the Qinghai-Tibetan Plateau also impose great influences on it. | SHEN Ji XIAO HaiFeng WANG SuMin AN ZhiSheng QIANG XiaoKe XIAO XiaYun | 2007 | Chinese Science Bulletin2007，52，13： | 4 |
| 19 | Meromixis in Zige Tangco, central Tibetan Plateau——Discovery and significance显示文摘Zige Tangco (4560 m a.s.l.), located in central Tibetan Plateau, was first discovered in China to be a meromictic lake. The meromixis was caused possibly by virtual sheltering due to the lake basin’s morphometry, and to a less extent by surface inflow of fresh water. As the highest meromictic lake ever discovered in the world, Zige Tangco could provide some insight into world lake systematic classification, and a potential site for present-day lake processes and lacustrine varve studies. | 李万春 李世杰 尹宇 季江 濮培民 | 2001 | Science China Earth Sciences2001，44，S1： | 3 |
| 20 | Degradation of organic matterin the sediments of Hongfeng Reservoir显示文摘In this work, the distribution of organic carbon, DNA and lipids in the sediments of Hongfeng Reservoir were described in addition to SO42? profile in pore water. The con- tents of organic carbon in the sediments range from 23.3 to 76.8 mg·g?1, with the peak value appearing at the depth of 8 cm bellow the sediments water interface (SWI), and tend to decrease gradually with sedimentation depth. The concentra- tions of SO42? decreased from 40.50 mg·L?1 to 12.00 mg·L?1 at SWI in top 4 cm sediment, and was kept at 12.0 mg·L?1 bel- low that depth. Newly produced organic carbon can be con- served as long as 14 years in the sediments. The contents of DNA were relatively high in top 9 cm surface sediments, as revealed by agarose gel images, close to those of organic car- bon and sulphate reduction index (SRI). This study shows that bacteria played an important role in organic matter degradation; SO42? is the primary electron acceptor under anaerobic condition in this reservoir; DNA in the lake sedi- ments can provide important information for the study of cycling of nutrient elements in the lake. | WEI Zhongqing LIU Congqiang LIANG Xiaobing WANG Fushun WANG Shaofeng | 2005 | Chinese Science Bulletin2005，50，20： | 2 |
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