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在全球变化背景下,滨海盐沼因其较强的固碳潜力,被视为重要的“蓝碳”生态系统。然而,近三十年来,原产北美大西洋海岸的外来植物互花米草在我国沿海盐沼迅速蔓延,持续扰动湿地生态结构与生物地球化学过程,也让盐沼蓝碳功能面临新的不确定性。互花米草的扩张,究竟是在提升盐沼的固碳能力,还是在悄然削弱这一重要生态系统的调节功能?一项发表在《Estuarine, Coastal and Shelf Science》的研究给出了答案。 为什么这项研究值得关注?盐沼、红树林、海草床等滨海生态系统是应对气候变化的重要自然解决方案,凭借碳封存、岸线防护、生物多样性维持等核心服务发挥关键作用。互花米草作为全球性滨海入侵植物,在我国沿海大面积扩散,严重改变湿地结构与生物地球化学循环。现有研究表明,互花米草入侵在促进土壤碳积累的同时,也可能显著提升温室气体排放,进而抵消部分蓝碳效益。然而,不同入侵年限下甲烷(CH₄)与二氧化碳(CO₂)通量的动态演变规律及其驱动机制,目前仍缺乏系统定量研究。近日,中国科学院南京地理与湖泊研究所徐力刚老师团队以江苏盐城东台滨海盐沼为研究区,基于周年原位连续观测,系统量化了互花米草入侵对CH₄与CO₂通量的影响及其驱动机制。研究表明,互花米草的持续扩张显著增强了温室气体排放,对滨海湿地蓝碳功能与气候调节能力构成不可忽视的威胁。 图1.盐城市东台市盐沼采样点位置(a和b)、现场照片(c)以及当前主要植物群落分布格局(d)。研究方法样地设置:研究地点位于江苏省盐城市东台市的盐沼地,为评估互花米草入侵对盐沼碳通量的影响,团队在该滨海盐沼设置五个典型样地:✧光滩(MF)✧互花米草入侵10年(SA10)✧互花米草入侵20年(SA20)✧本土植物碱蓬(SS)✧本土植物芦苇(PA)监测指标:CO₂和CH₄的通量、植被地上(AGB)和地下生物量(BGB)、土壤含水量、盐度、粒径组成、SOC、...
发布时间: 2026 - 04 - 20
浏览次数:16
Measurement of extremely 2H-enriched water samples by laser spectrometry: application to batch electrolytic concentration of environmental tritium samples国际原子能机构(International Atomic Energy Agency -- IAEA)研究人员应用LGR水同位素分析仪测量高2H富集水样(备注:该文章是IAEA的研究人员独立发表的文章,具有权威性、客观性和独立性,亦可广泛使用。)IAEA的研究人员发表了一篇应用LGR水同位素分析仪(912-0032)测量高2H富集水样的文章,文章有2个目的:(1)论证基于OA-ICOS技术的水同位素分析仪可以快速获得高准确性和高精度的自然丰度水样和氘富集水样(delta_2H ~ +57,000‰)的δ2HVSMOW-SLAP   数值;(2)随后论证基于激光技术2H富集方法测量水样的效能,以促进进行批处理3H电解富集的环境氚水实验室的生产力。文章中还简要说明了应用CRDS分析仪测量高2H富集水样的情况(CRDS水同位素分析仪可测量数值约为750‰的δ2HVSMOW-SLAP样品,但两个样品之间需要大于20次以上的注射才可去除显著...
发布时间: 2016 - 01 - 18
浏览次数:233
UNSW researchers have used a new water-tracing technology in the Sydney Basin for the first time to determine how groundwater moves in the different layers of rock below the surface.新南威尔士大学(UNSW)研究人员在悉尼盆地首次应用新的水源示踪技术监测地表下不同岩层下的地下水运动 http://newsroom.unsw.edu.au/news/science-tech/new-water-tracing-technology-help-protect-sydney-basin-groundwater
发布时间: 2016 - 01 - 15
浏览次数:130
LGR的二氧化碳同位素分析仪帮助中国科学院的科学家监测“新鲜有机物的质量对土壤有机物的启动和微生物底物利用率模式的影响” Quality of fresh organic matter affects priming of soil organic matter and substrate utilization patterns of microbesHui Wang1, 2 , Thomas W. Boutton3 , Wenhua Xu1 , Guoqing Hu1, 2 , Ping Jiang1 , Edith Bai1 AbstractChanges in biogeochemical cycles and the climate system due to human activities are expected to change the quantity and quality of plant litter inputs to soils. How changing quality of fresh organic matter (FOM) might influence the priming effect (PE) o...
发布时间: 2015 - 10 - 16
浏览次数:185
Rapid, Online Quantification of H2S in JP-8 Fuel Reformate Using Near-Infrared Cavity-Enhanced Laser Absorption Spectroscopy应用LGR激光痕量气体分析仪快速在线量化JP-8(特级航空材料)中的H2SFeng Dong†, Christian Junaedi‡, Subir Roychoudhury‡, and Manish Gupta*†† Los Gatos Research, 67 East Evelyn Avenue, Suite 3, Mountain View, California 94041, United States‡ Precision Combustion, Inc., 410 Sackett Point Road, North Haven, Connecticut 06473, United StatesAnal. Chem., 2011, 83 (11), pp 4132–4136DOI: 10.1021/ac200300tPublication Date (Web): May 3, 2011Copyright © 2011 American Chemical SocietyAbstractOn...
发布时间: 2015 - 10 - 10
浏览次数:225
Ecosystem carbon (CO2 and CH4) fluxes of a Populus dettoides plantationin subtropical China during and post clear-cutting Shenghua Gao a, Jiquan Chen b, Yuxi Tang c, Jing Xie d, Rui Zhang e, Jie Tang c, Xudong Zhang a,*a State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, Chinab Center for Global Change and Earth Observations (CGCEO) and Department of Geography, Michigan State University, East Lansing, MI 48823, USAc Hunan Academy of Forestry, Chang...
发布时间: 2015 - 09 - 15
浏览次数:170
HYPERSPECTRAL REMOTE SENSING FOR DETECTION OF RHIZOCTONIA CROWN AND ROOT ROT IN SUGARBEETGregory J. Reynolds1, Carol E. Windels2, Ian V. MacRae3, and Soizik Laguette4Graduate Student, Professor, Associate Professor, and Assistant Professor, respectively1University of Minnesota, Department of Plant Pathology, St. Paul2University of Minnesota, Department of Plant Pathology and Northwest Research & Outreach Center, Crookston3University of Minnesota, Department of Entomology and Northwest Research & Outreach Center, Crookston4University of North Dakota, Department of Earth System Science a...
发布时间: 2015 - 08 - 11
浏览次数:129
DETECTION OF SUGARCANE AFRICAN STALK BORER ELDANASACCHARINA WALKER (LEPIDOPTERA: PYRALIDAE) USINGHYPERSPECTRAL REMOTE SENSING (SPECTRORADIOMETRY)应用ASD地物光谱仪检测蛀虫ELDANA SACCHARINA(鳞翅目:螟蛾科)对非洲甘蔗茎部的危害程度MOKHELE TA1, AHMED F1 and CONLONG DE2,31School of Environmental Sciences, University of KwaZulu-Natal, Durban, 4041, South Africa2South African Sugarcane Research Institute, Private Bag X02, Mount Edgecombe 4300, South Africa3School of Biological and Conservation Sciences, University of KwaZulu-Natal, Private Bag X01, Scottsville, 3209, South AfricaAbstractThe South African sugar industry i...
发布时间: 2015 - 08 - 06
浏览次数:163
LGR氧化亚氮同位素分析仪测量水中硝酸盐成功案例:Analytical Chemistry 文章:Combining Denitrifying Bacteria and Laser Spectroscopy for Isotopic Analyses (δ15N, δ18O) of Dissolved Nitrate通过反硝化细菌和激光同位素分析仪测定溶解硝酸盐中的δ15N和δ18ODavid X. Soto *†, Geoff Koehler †, and Keith A. Hobson †† Environment Canada, 11 Innovation Boulevard, Saskatoon, Saskatchewan, Canada, S7N 3H5AbstractWe present a novel approach for nitrogen (δ15N) and oxygen (δ18O) isotopic analysis of nitrate in water based on the isotopic analysis of N2O produced from the conversion of NO3– by cultured denitrifying bacteria and off-axis integrated cavity output ...
发布时间: 2015 - 07 - 21
浏览次数:184
Nature 发表文章:In-situ unsaturated zone stable water isotope (2H and 18O) measurements in semi-arid environments using tunable o-axis integrated cavity output spectroscopy科学家应用LGR液态水同位素分析仪在半干旱环境下原位测量不饱和带水中2H和18O同位素比值M. Gaj1,2,  M. Beyer1,  P. Koeniger1,  H. Wanke3,  J. Hamutoko3,  and T. Himmelsbach11 Federal Institue for Geosciences and Natural Resources (BGR), Stilleweg 2, Hannover, Germany2 Chair of Hydrology, Faculty of Environment and Natural Resources, University of Freiburg, Fahnenbergplatz, 79098 Freiburg, Germany3Universit...
发布时间: 2015 - 07 - 07
浏览次数:146
Inter- and intraindividual correlations of background abundances of 2H, 18O and 17O in human urine and implications for DLW measurements科学家应用LGR同位素分析仪测定人体尿液中的2H,18O和17O丰度间的相互作用对DLW测量方法的影响E S F Berman, E L Melanson, T Swibas, S P Snaith and J R SpeakmanBackground/Objectives:The method of choice for measuring total energy expenditure in free-living individuals is the doubly labeled water (DLW) method. This experiment examined the behavior of natural background isotope abundance fluctuations within and between individuals over time to assess possible methods of accounting for varia...
发布时间: 2015 - 07 - 01
浏览次数:136
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