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Evidence from isotopic geochemistry as an indicator of eutrophication of Meiliang Bay in Lake Taihu, china

Science china Earth Sciences 2006年第z1期49卷 62-71页

作者： lin lin, wu jinglu & wang sumin nanjing institute of geography & limnology, Chinese Academy of Sciences, nanjing 2.0008, china Graduate University of the Chinese Academy of Sciences, Beijing 100039, china Chinese Acad Sci Nanjing Inst Geog & Limnol Nanjing 210008 Peoples R China Chinese Acad Sci Grad Univ Beijing 100039 Peoples R China

In this paper, Lake Taihu, a large shallow freshwater lake in china, is chosen as an example of reconstruction of eutrophication through the comparison between stable isotopes from dissolved nutrients and plants and water column nutrient parameters and integration of multiple proxies in a sediment core from Meiliang Bay including TN, TP, TOC, C/N, δ15N, δ13C, etc. Differences in aquatic plant species and trophic status between East Taihu Bay and Meiliang Bay are indicated by their variations in δ13C and δ15N of aquatic plants and δ15N of NH4.. A significant influence ofexternal nutrient inputs on Meiliang Bay is reflected in temporal changes in δ 15N of NH4. and hydro-environmental parameters. The synchronous change between δ13C and δ15N values of sedimented organic matter (OM) has been attributed to elevated primary production at the beginning of eutrophication between 1950 and 1990, then recent inverse correlation between them has been caused by the uptake of 15N-enriched inorganic nitrogen by phytoplankton grown under eutrophication and subsequent OM decomposition and denitrification in surface sediments, indicating that the lake has suffered from progressive eutrophication since 1990. Based on the use of a combination of stable isotopes and elemental geochemistry, the eutrophication of Meiliang Bay in Lake Taihu could be better traced. These transitions of the lake eutrophication respectively occurring in the 1950s and 1990s have been suggested as a reflection of growing impacts of human activities, which is coincident with the instrumental data.

关键词： stable carbon isotope of OM, stable nitrogen isotope, eutrophication, Lake Taihu.

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Characteristics of an early Holocene climate and environment from lake sediments in Ebinur region, NW china

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Science china Earth Sciences 2005年第2期48卷 258-265页

作者： wu jinglu SHEN Ji wang sumin JIN Zhangdong YANG Xiangdong nanjing institute of geography & limnology Chinese Academy of SciencesNanjing210008China Nanjing Institute of Geography & LimnologyChinese Academy of SciencesNanjing210008China Nanjing Institute of Geography & LimnologyChinese Academy of SciencesNanjing210008China Nanjing Institute of Geography & LimnologyChinese Academy of SciencesNanjing210008China Nanjing Institute of Geography & LimnologyChinese Academy of SciencesNanjing210008China

The characteristics of climatic environment in the early Holocene epoch were studied through analyzing environmental proxies from the sediments in the Ebinur Lake--a closed one in the arid region. The pollen assemblage and other geochemical indices showed that, the temperature was somewhat low in the period (8.0-11.5 cal kaBP) as a whole, but in the early period (11.5-10.6 cal kaBP) the temperature was higher, in company with more precipitation. In the conversion period from the early Holocene epoch to the middle Holocene epoch (8.9-8.0 cal kaBP) the climate fluctuated remarkably. Particularly the three layers of peat sediment revealed the strong instability of climate in the early Holocene epoch in the Ebinur region. All information on the development of peat and the experimental data of pollen and stable isotopes implied that, the climatic condition at 8.2, 8.6 and 10.5 cal kaBP was characterized by noticeable cold and humidness, and could be regarded as three cold and humid events in the early Holocene epoch.

关键词： early Holocene epoch, climatic evolution, pollen assemblege, stable isotopic record, Ebinur Lake.

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Status of aquatic organisms resources and their environments in Yangtze River system(2017-2021)⋆

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Aquaculture and Fisheries 2024年第5期9卷 833-850页

作者： Haile Yang Li Shen Yongfeng He Huiwu Tian Lei Gao Jinming wu Zhigang Mei Nian Wei lin wang Tingbing Zhu Feifei Hu Jinling Gong Hongchun Du Xinbin Duan Huatang Deng Daoqun wang Fengyue Zhu Yunfeng Li Fan wu Huijun Ru Yan Zhang Junyi Li Junlin Yang Yuntao Zhou Dongdong Fang Yinping wang Danqing lin Yanping Yang Peijie Li Silei Liu Jian Yang Ping Zhuang Sikai wang Tao Zhang Gang Yang Wenbo Yang Lilai Yuan Kun Cao Shuo Xu Huiyuan Liu Zhiqiang Liang Chongrui wang Hong Li Xiping Yuan Xin Yang Yilong Fu Yanping Zhang Haixin Zhang Zhiying Tao Sheng wang Xiaoping Gao Binsong Jin Kemao Li Guojie wang Shenglong Jian Yingqin Li Chenjiang Xue Chunyun Lei Shaowei Xue Yi Sun Bin Zhu Ke Shao Xingkun Hu Meihua Xiong Jun Du Bin He Tao Yan Yingying Huang Yuanchao Zou Biwen Xie Yongming wang Bin Li Fei Liu Yaoyao Zhang Fei Fan Zhijian wang Jing Huang Haoran Gu Hailong Ge Yan Dan Yan Li Shuqiao wang Chuang Zhang Lu Zhou Xue wang Sheng Zeng Yan Xiang Xugang He Jianhui Qin Chengxing Xia Jie Hou Yifu Shi Lifang Gao Zhiqiang Zhu Hongbao Shen Yun Du Xuejun Duan Jiawu Xiong Deguo Yang Shaoping Liu Zhaohui Ni Hui Zhang Kai Liu Feng Zhao Yingren Li Jianwei wang Qiwei Wei Yangtze River Fisheries Research institute Chinese Academy of Fishery SciencesWuhan430223China institute of Hydrobiology Chinese Academy of SciencesWuhan430072China Fishery Resource and Environment Research Center Chinese Academy of Fishery SciencesBeijing100141China Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization Ministry of Agriculture and Rural AffairsFreshwater Fisheries Research CenterChinese Academy of Fishery SciencesWuxi214081China East china Sea Fisheries Research institute Chinese Academy of Fishery SciencesShanghai200090China institute of Fisheries Engineering Chinese Academy of Fishery SciencesBeijing100141China Hunan Fisheries Science institute Changsha410153China Jiangxi Fisheries Research institute Nanchang330039China Jiujiang Academy of Fishery Sciences Jiujiang332000China School of Life Sciences Nanchang UniversityNanchang330031China Qinghai Provincial Fishery Technology Extension Center Xining810012China Yunnan Academy of Fishery Sciences Kunming650111China institute of Hydroecology Ministry of Water Resources and Chinese Academy of SciencesWuhan430079China Fisheries institute Sichuan Academy of Agricultural SciencesChengdu611731China School of Life Sciences Neijiang Normal UniversityNeijiang641100China School of Life Sciences Southwest UniversityChongqing400715China Chongqing Fishery Sciences Research institute Chongqing401120China Guizhou Fisheries Research institute Guiyang550025China College of Fisheries Huazhong Agricultural UniversityWuhan430072China Hubei Fisheries Science Research institute Wuhan430070China Shaanxi Fisheries Research institute Xi’an710086China Innovation Academy for Precision Measurement Science and Technology Chinese Academy of SciencesWuhan430077China nanjing institute of geography and limnology Chinese Academy of SciencesNanjing210008China Central South Inventory and Planning institute of State Forestry and Grassland Administration Changsha410014China

The Yangtze River is the mother river of *** promote the aquatic ecosystem protection of the great river,the Project of Yangtze Fisheries Resources and Environment Investigation(2017-2021)supported by the Ministry of Agriculture and Rural Affairs,*** carried out by 24.institutes and universities that located in the Yangtze River basin surveys the status of(1)fish species composition and spatial distribution,(2)current fish abundance,(3)endangered fishes,(4.Yangtze finless porpoise,(5)aquatic eco-environments,(6)water-level fluctuation areas,(7)capture fisheries and recreational fisheries of the Yangtze River mainstream and 10 of its main tributaries,including Yalong River,Heng River,Min River(including Dadu River),Chishui River,Tuo River,Jialing River,wu River,Han River,Dongting Lake and Poyang *** results showed that there were 4.3 fish species(belonging to 163 genus,37 families,and 18 orders)before 2017,but only 323 fish species(including 15 new recorded exotic species)were recorded in the project of *** them,Cyprinus carpio,Carassius auratus,Hypophthalmichthys molitrix,Pelteobagrus fulvidraco,Coilia brachygnathus,Silurus asotus,Saurogobio dabryi,Ctenopharyngodon idellus,Pelteobagrus nitidus,Hemiculter leucisculus,Siniperca chuatsi,Coreius heterodon,Culter alburnus,Parabramis pekinensis,and Aristichthys nobilis were the dominant species across the whole Yangtze River *** is estimated that there were 886 million individuals weighing 124.8 million kg,merely equivalent to 27.3%of the resources in 1950s,30.9%of the resources in 1960s,or 58.7%of the resources in *** the new list of protected fishes that recorded in the Yangtze River system,only 15 of 29 were collected in this project of *** gladius has been affirmed to be Extinct by International Union for Conservation of Nature(IUCN).The wild individuals of Tenualosa reevesii and Luciobrama macrocephalus have disappeared for many years and maybe have been extinct

关键词： Fishes Yangtze finless porpoise Resources Aquatic ecosystem Fisheries Background investigation Yangtze river system

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china's lakes at present:Number,area and spatial distribution

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Science china Earth Sciences 2011年第2期54卷 283-289页

作者： MA RongHua YANG GuiShan DUAN HongTao JIANG JiaHu wang sumin FENG XueZhi LI AiNong KONG FanXiang XUE Bin wu jinglu LI ShiJie State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China Department of Geographic Information Science Nanjing University Nanjing 210093 China institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China

Based on 11004.satellite images from CBERS CCD and Landsat TM/ETM,changes in the spatial characteristics of all lakes in china were determined following pre-established interpretation *** dataset was supported by 684. digital raster images(1:100000 and 1:50000),a countrywide digital vector dataset(1:250000),and historical *** data were corrected for seasonal variations using precipitation *** are presently 2693 natural lakes in china with an area greater than 1.0 km2,excluding *** lakes are distributed in 28 provinces,autonomous regions and municipalities and have a total area of 814.4.6 km2,accounting for-0.9% of china's total land *** the past 30 years,the number of newly formed and newly discovered lakes with an area greater than 1.0 km2 is 60 and 131,***,24. lakes have disappeared in this time period.

关键词： china lake number lake area spatial distribution

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江西和福建省植被覆盖时空特征及其地形梯度效应

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水土保持研究 2024年第1期31卷 290-300页

作者：林莹冰王小军全明英林杜锐卢毅刘光旭华南师范大学地理科学学院广州510631 中国科学院地质与地球物理研究所北京100029 中国科学院大学北京100049 中国科学院南京地理与湖泊研究所南京210008 赣南师范大学地理与环境工程学院江西赣州341000

[目的]探讨华南地区植被覆盖时空特征,为生态系统调查与保护提供参考。[方法]以江西和福建省为例,将1998年、2005年、2010年、2015年、2019年5年的植被覆盖由低到极高划分为6个等级,使用土地利用研究中的动态度、转移等思路分析植被覆... 详细信息

[目的]探讨华南地区植被覆盖时空特征,为生态系统调查与保护提供参考。[方法]以江西和福建省为例,将1998年、2005年、2010年、2015年、2019年5年的植被覆盖由低到极高划分为6个等级,使用土地利用研究中的动态度、转移等思路分析植被覆盖时空特征,并探讨其地形梯度效应。[结果](1)江西和福建植被覆盖以高和极高覆盖为主(78.4.%~89.8%),尤其是在内陆山地丘陵区,而沿江、沿海等人口密集的城市区相对较低、面积较小;1998—2019年该区植被覆盖较好且变化的整体趋势仍是增加;最显著变化发生在2010—2015年由高覆盖转移为极高覆盖。(2)地形梯度指数显示,中等植被覆盖及以下主要分布在海拔低于200 m、坡度小于6°、地形位小于0.4.的1~2级地形梯度区;较高覆盖及以上较为分散的分布在各地形梯度内,且随着覆盖度增加有向海拔高于200 m、坡度大于6°、地形位大于0.4.的3~5级地形梯度区分布趋势。(3)在植被覆盖不变或改善类中,低覆盖转移主要发生在1级地形梯度,较低覆盖和中等覆盖转移主要发生在1~3级地形梯度区,较高覆盖及以上的转移在5类地形梯度均有发生且相对分散;在植被覆盖恶化类中,中等覆盖及以下的转移多发生在1~3级地形梯度区,较高覆盖及以上的转移在5类地形梯度区多有发生且相对分散;转移等级跨度较大的情况多发生在较低等级的地形梯度区。[结论]研究区植被覆盖率较高,植被覆盖变化存在时空差异,生态系统调查与保护需要考虑不同地形梯度下的影响因素。

关键词：植被覆盖时空特征地形梯度动态度弦图华南

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三江源地区湖塘变化及其与多年冻土联系

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地理科学进展 2024年第7期43卷 1441-1455页

作者：汤芸淇汪凌霄赵林李艳李智斌刘世博邹德富王紫珊刘童丁嘉怡赵建婷南京信息工程大学地理科学学院南京210044 中国科学院南京地理与湖泊研究所中国科学院流域地理学重点研究室南京210008 中国科学院大学北京100049 中国科学院西北生态环境资源研究院冰冻圈科学国家重点实验室藏北高原冰冻圈特殊环境与灾害国家野外科学观测研究站兰州730000

近年来,青藏高原湖泊的快速扩张引起广泛关注,已有不少研究系统分析了大于1 km^(2)的大型湖泊的变化动态,但对于面积较小的由于多年冻土退化形成的热融湖塘,其在大范围流域尺度上的分布及变化研究尚不多见。论文基于光学和雷达影像,系... 详细信息

近年来,青藏高原湖泊的快速扩张引起广泛关注,已有不少研究系统分析了大于1 km^(2)的大型湖泊的变化动态,但对于面积较小的由于多年冻土退化形成的热融湖塘,其在大范围流域尺度上的分布及变化研究尚不多见。论文基于光学和雷达影像,系统分析了三江源区内湖塘(4.987个,黄河源区124.9个,澜沧江源区最少。(2)相较于1960年代,2020年代三江源区域面积小于1 km^(2)湖塘数量增加了76%,面积增加了13%。长江源区湖塘扩张明显,黄河源区、澜沧江源区的部分湖塘萎缩。1960年代的湖塘有53%在2020年代依然存在。(3)三江源区80.9%的湖塘底部冬季存在融区,其中长江源有78.2%,黄河源有90.8%,澜沧江源有98.7%。在多年冻土区,有一半底部有融区的湖塘在1960年代就已存在,新增湖塘底部冬季较少存在融区,目前浮冰湖塘范围要远大于触底冰湖塘范围,可能会进一步加速多年冻土融化。研究结果可为分析多年冻土退化状态以及多年冻土退化与热融湖塘发育之间的联系提供基础,为高原地区热融湖塘碳排放研究提供基础数据。

关键词：热融湖塘多年冻土退化三江源区湖塘底部融区

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21世纪全球新建水库编目:丰度、热点区及总蓄水量

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Science Bulletin 2024年第14期69卷 2179-2182页

作者：范晨雨宋春桥 Jida wang Yongwei Sheng 蔺亚玲苑春雨 Md Safat Sikder Jean-Francois Crétaux 刘凯陈探曾繁轩柯灵红 Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China University of Chinese Academy of Sciences Nanjing(UCASNJ)Nanjing 211135China Department of geography and Geographic Information Science University of Illinois Urbana-ChampaignUrbana IL 61801USA Department of geography and Geospatial Sciences Kansas State UniversityManhattan KS 66506USA Department of geography University of CaliforniaLos Angeles CA 90095USA Laboratoire d’Études en Géophysique et Océanographie Spatiales(LEGOS) CNES-IRD-CNRS-UT3Universitéde ToulouseToulouse 31401France College of Hydrology and Water Resources Hohai UniversityNanjing 210098China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210098China

Dams and reservoirs play an essential role in regulating and managing water *** the middle of the 20th century,the growing demand for water and hydropower has led to an unprecedented boom in reservoir construction worldwide[1,2].Meanwhile,reservoir construction has also resulted in a variety of ecological and socioeconomic impacts[3–5].Reservoirs transform natural flow regimes into conditions favored by human *** associated flow regulations,especially in reservoirs constructed in recent decades(e.g.,after 2000)with greater seasonal variability[6,7],represent a strong human-induced alteration of the hydrologic *** reservoir construction continues to boom in many parts of the world,an up-to-date and openaccess inventory of reservoirs worldwide remains critically desired.

关键词： reservoir reservoirs alteration

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Risk assessment and identification of factors influencing the historical concentrations of microcystin in Lake Taihu, china

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Journal of Environmental Sciences 2023年第5期127卷 1-14页

作者： Chen Cheng Alan D.Steinman Kaiye Zhang Qi lin Qingju Xue Xing wang Liqiang Xie State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Annis Water Resources institute Grand Valley State University740 West Shoreline DriveMuskegonMIUSA National Engineering Laboratory for Lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental SciencesBeijing 100012China State Environmental Protection Key Laboratory of Drinking Water Source Protection Chinese Research Academy of Environmental SciencesBeijing 100012China

Understanding the history of microcystins(MCs)pollution in large lakes can help inform future lake *** collected sediment cores from Lake Taihu to:investigate the long-term record of MCs(MC-LR,MC-YR,and MC-RR),explore the main environmental drivers of MCs,and assess their public health and ecological *** showed that MCs content in all cores increased over *** core from north Taihu had the highest MC concentrations,with an average total MCs(sum of MC-LR,MC-YR,and MC-RR=TMCs)content of(74.31±328.55)ng/*** core from eastern Taihu showed the lowest average TMCs content of(2.91±3.95)ng/*** showed that sediment MCs at the three sites were positively correlated with sediment ***-LR and MC-YR in northern and western Taihu negatively correlated with both the sediment total organic carbon/sediment total nitrogen ratio(STOC/STN)andwater nitrate(NO_(3)^(−)-N)concentration,but three MC congeners at eastern Taihu showed positive correlations with water orthophosphate(PO_(4.^(3−)-P),NO_(3)^(−)-N,and STOC/*** additive model analysis at each site revealed that NO_(3)^(−)-N was the main TMCs driver in northern andwestern Taihuwhere phytoplankton dominated,whereasPO_(4.^(3−)-P was the main TMCs driver in eastern Taihu where macrophytes *** the whole lake scale,total phosphorus(TP)andPO_(4.^(3−)-P were the most important environmental drivers influencing MCs;TP explained 4..4.,4..2%,and 4..6%while orthophosphate explained 34.8%,31.2%,and 34.7%of the deviance on TMCs,MC-LR,and MC-YR,***_(3)^(−)-N also showed a strong effect on MCs variation,especially on *** assess-ment showed that both ecological and public health risk has increased in recent *** conclude that while control of phosphorus and nitrogen input should be a major focus for future lake management,lake zone-specificmanagement strategiesmay also be important.

关键词： Microcystins Pollution history Orthophosphate Nitrate Risk assessment Lake Taihu

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The dynamic observation of dissolved organic matter in the Zhujiang(Pearl River)Estuary in china from space

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Acta Oceanologica Sinica 2018年第7期37卷 105-117页

作者： LIU Dong BAI Yan HE Xianqiang PAN Delu wang Difeng WEI Ji'an ZHANG lin State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyState Oceanic AdministrationHangzhou 310012China Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China

The distributions of estuarine colored dissolved organic matter（CDOM）are the combined results of physicalbiogeochemical *** sensing is needed to monitor highly dynamically estuarine *** in situ data from four seasonal cruises,an algorithm is developed to estimate CDOM absorption coefficient at 4.0nm（aCDOM（4.0））in the Zhujiang（Pearl River）Estuary（ZJE）.The algorithm uses band ratios of Rrs（667）/Rrs（4.3）and Rrs（74.）/Rrs（4.2）.By applying it to moderate resolution imaging spectroradiometer onboard Aqua satellite（MODIS/Aqua）data from 2002 to 2014.seasonal climatology aCDOM（4.0）in the ZJE is *** distributions are majorly influenced by water discharge from the Zhujiang River and underwater *** the section vertical to a water depth gradient,the seasonal aCDOM（4.0）exponentially decreased（y=aebx,b〈0）,but with great differences among *** fresh water is the primary source of CDOM in the *** acid fraction decreases with increasing *** developed algorithms,conservative CDOM mixing equation,and river discharge,effective riverine end-member concentration and flux of dissolved organic carbon（DOC）in summer and winter from 2002 to 2014.are first estimated from the MODIS/Aqua *** effective riverine end-member DOC concentration and flux are positively related to the river discharge,significantly in summer with R-2 of 0.698 for concentration and 0.965 7 for flux.

关键词： colored dissolved organic matter dissolved organic carbon Zhujiang(Pearl River)Estuary effective riverine end-member flux remote sensing

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江苏河网区地表水沉积物中OCPs的赋存特征及风险

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中国环境科学 2024年第2期44卷 923-931页

作者：韦皓元林贵英姚晓龙李建平王苏红龚雄虎蔡永久张路赵中华湖北师范大学城市与环境学院湖北黄石435002 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室江苏南京210008 扬州市城市河道管理处江苏扬州225000

选取我国平原河网典型区域—江苏省内重点湖泊、水库及河流等为研究对象,系统调查江苏省地表水环境沉积物中有机氯农药(OCPs)的残留现状,解析区域空间分布特征和来源并评估其生态风险.结果表明,目标区域湖泊、水库及河流表层沉积物中20... 详细信息

选取我国平原河网典型区域—江苏省内重点湖泊、水库及河流等为研究对象,系统调查江苏省地表水环境沉积物中有机氯农药(OCPs)的残留现状,解析区域空间分布特征和来源并评估其生态风险.结果表明,目标区域湖泊、水库及河流表层沉积物中20种OCPs化合物检出率为100%,残留范围为0.4.~10.62ng/g dw(平均值为3.14.g/g dw).与国内其它流域相比,江苏省地表水环境表层沉积物中OCPs的污染负荷整体处于较低水平.OCPs单体化合物特征比值溯源结果显示,江苏省表层沉积物中的OCPs主要来源于历史残留.运用风险熵值法对江苏省表层沉积物OCPs进行生态风险评估,结果显示环氧七氯是主要的生态风险因子,其次为α-硫丹和异狄氏剂.联合生态风险评价表明太湖梅梁湾湖区处于高风险,不同水体类型沉积物OCPs风险水平呈现为湖泊高于河流、河流高于水库的整体趋势.在国家加强新污染物治理的背景下,OCPs等传统持久性有机污染物POPs同样需要持续关注,支撑流域水环境复合污染治理和风险防范.

关键词：平原河网地表水沉积物有机氯农药(OCPs) 风险评估

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