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学者姓名:罗敏
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Tidal marshes serve as critical carbon (C) sinks, yet face increasing threats from global environmental changes. While previous research has documented how nitrogen (N) loading and sea-level rise affect total C pools individually, their impacts on soil organic carbon (SOC) stabilization remain critically underexplored, particularly when these factors co-occur in tidal marsh ecosystems. Through a 3-yr field experiment, we analyzed how these factors, alone and combined, impact SOC stabilization by examining SOC fraction dynamics. Results showed that N loading increased particulate organic carbon (POC) by 18% and decreased mineral-associated organic carbon (MAOC) by 13%, reducing SOC stabilization. Conversely, increased inundation raised MAOC by 31% and decreased POC by 19%, promoting SOC stabilization. The decreased MAOC under N loading stemmed from reduced fungal necromass C, while the increased POC related to lower phenol oxidase activity. In contrast, with increased inundation, MAOC rose due to iron-bound organic C (Fe-OC) accumulation, while POC declined from increased phenol oxidase activity. When both factors were applied together, SOC stabilization remained at control levels. This occurred because the combined effect maintained oxidative enzyme activities and thus retained POC levels. The simultaneous reduction in fungal necromass C and enhancement of Fe-OC associations established complementary mechanisms that maintained MAOC at levels equivalent to control. Our findings reveal that N loading and increased inundation drive contrasting patterns of SOC stabilization, while their combination produces uniquely stabilized C dynamics. This insight challenges single-factor predictions and underscores the importance of multi-factor experiments in understanding ecosystem responses under concurrent global change scenarios.
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GB/T 7714 | Fan, Tianning , Huang, Jiafang , Liang, Guopeng et al. Unexpectedly stable soil organic carbon in tidal marshes under combined nitrogen loading and increased inundation compared to individual effects [J]. | LIMNOLOGY AND OCEANOGRAPHY , 2025 , 70 (8) : 2125-2141 . |
MLA | Fan, Tianning et al. "Unexpectedly stable soil organic carbon in tidal marshes under combined nitrogen loading and increased inundation compared to individual effects" . | LIMNOLOGY AND OCEANOGRAPHY 70 . 8 (2025) : 2125-2141 . |
APA | Fan, Tianning , Huang, Jiafang , Liang, Guopeng , Liu, Shengen , Hu, Dehong , Su, Lifei et al. Unexpectedly stable soil organic carbon in tidal marshes under combined nitrogen loading and increased inundation compared to individual effects . | LIMNOLOGY AND OCEANOGRAPHY , 2025 , 70 (8) , 2125-2141 . |
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Microbial carbon use efficiency (CUE) typically promotes soil organic carbon (SOC) storage in terrestrial ecosystems. However, this relationship remains poorly understood in coastal wetlands, where tidal flooding creates unique environmental conditions, facilitates lateral transfer and SOC loss, and mediates organic matter exchange between terrestrial and marine systems. Here we examined the CUE-SOC relationship across a tidal flooding gradient (4-25 % frequency) in a subtropical coastal wetland. Along this gradient, SOC decreased by 65 % while microbial CUE increased from 0.24 to 0.32. This inverse relationship coincided with marked compositional shifts: plant debris declined from 57 % to 18 %, while microbial necromass increased from 21 % to 35 %. The enhanced CUE was accompanied by increased turnover times alongside decreased metabolic quotient (qCO2), C-acquiring enzyme activities, soil basal respiration, and microbial biomass carbon (MBC). This enhanced efficiency stemmed from substrate-microbe interactions rather than environmental stresses, as communities transitioned from oligotrophic taxa (alpha-proteobacteria, Basidiomycota) specializing in recalcitrant terrestrial substrates to copiotrophic microorganisms (gamma-proteobacteria, Bacteroidota, Ascomycota) efficiently metabolizing labile marine compounds. Contrary to terrestrial patterns, enhanced CUE did not promote SOC storage due to three key mechanisms: (i) enhanced CUE from marine substrates could not compensate for declining plant debris accumulation; (ii) reduced microbial biomass limited necromass formation despite higher CUE; and (iii) metabolic benefits from high CUE (reduced enzyme activities and respiration rates) could not offset the substantial decrease in SOC inputs. Our findings reveal distinct CUE-SOC relationships in coastal wetlands compared to terrestrial ecosystems, highlighting the importance of considering both terrestrial and marine processes in understanding carbon cycling in these transitional environments.
Keyword :
Carbon use efficiency Carbon use efficiency Coastal wetland Coastal wetland Microbial community composition Microbial community composition Soil organic carbon Soil organic carbon Substrate quality Substrate quality Tidal flooding gradient Tidal flooding gradient
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GB/T 7714 | Tan, Ji , Huang, Jiafang , Quan, Wenhui et al. Divergence of microbial carbon use efficiency and soil organic carbon along a tidal flooding gradient in a subtropical coastal wetland [J]. | WATER RESEARCH , 2025 , 280 . |
MLA | Tan, Ji et al. "Divergence of microbial carbon use efficiency and soil organic carbon along a tidal flooding gradient in a subtropical coastal wetland" . | WATER RESEARCH 280 (2025) . |
APA | Tan, Ji , Huang, Jiafang , Quan, Wenhui , Su, Lifei , Liu, Yi , Cai, Yuanbin et al. Divergence of microbial carbon use efficiency and soil organic carbon along a tidal flooding gradient in a subtropical coastal wetland . | WATER RESEARCH , 2025 , 280 . |
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Increased nitrogen (N) loading and sea-level rise (SLR) are two dominant drivers of global change that threaten tidal marshes and the ecosystem services they provide, including the sequestration of organic carbon. Nevertheless, the mechanisms through which N loading enrichment, SLR inundation increase, and their combined effects impact the rates and pathways of soil organic carbon (SOC) mineralization in tidal marshes remain poorly understood. We utilized a factorial design in an oligohaline tidal marsh, utilizing in situ weirs to simulate SLR inundation increase by manipulating the duration of flooding with or without nitrogen enrichment as NaNO3 plus NH4Cl or with a combination of increased flood duration and nitrogen. After nearly 2 years, the addition of N increased total SOC mineralization (CMR), soil microbial Fe(III) reduction (FeRR), NO3– reduction (NRR), and SO42– reduction (SRR) but decreased methanogenesis (MGR). The abiotic factor Fe(III)/Fe(II) ratio and dissolved organic carbon (DOC), and the biotic factors, β-glucosidase (BG), and phenol oxidase (PHO) activity explained the increased SOC mineralization rates following N enrichment. Increased flood duration did not change CMR, but increased flooding offset the stimulatory effects of N addition on CMR, FeRR, SRR, NRR and MGR. The contributions of Fe(III) reduction and SO42– reduction pathways to SOC mineralization increased in all experimental treatments, FeRR, SRR, NRR, and MGR were significantly positively correlated with the abundance of Geobacter, dsrA, nrfA, and mcrA. SLR inundation increase did not increase soil carbon loss in this oligohaline marsh and may counteract the simulation of soil C loss due to N enrichment. © 2024
Keyword :
Carbon decomposition Carbon decomposition Functional microbes Functional microbes Inundation Inundation Nitrogen loading enrichment Nitrogen loading enrichment Oligohaline marsh Oligohaline marsh Sea-level rise Sea-level rise
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GB/T 7714 | Tong, C. , Tan, J. , Luo, M. et al. Inundation counteracts the promoting effect of nitrogen enrichment on soil organic carbon mineralization in a tidal marsh [J]. | Fundamental Research , 2024 . |
MLA | Tong, C. et al. "Inundation counteracts the promoting effect of nitrogen enrichment on soil organic carbon mineralization in a tidal marsh" . | Fundamental Research (2024) . |
APA | Tong, C. , Tan, J. , Luo, M. , Huang, J. , Xiao, S. , Liu, B. et al. Inundation counteracts the promoting effect of nitrogen enrichment on soil organic carbon mineralization in a tidal marsh . | Fundamental Research , 2024 . |
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aquatic ecosystems aquatic ecosystems carbon cycle carbon cycle dry-wet cycling dry-wet cycling greenhouse gases (GHGs) greenhouse gases (GHGs) microbial metabolism microbial metabolism
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GB/T 7714 | Zhang, Peng , Luo, Min , Fu, Chuancheng et al. Editorial: Microbial-driven carbon turnover from dry-wet cycling regions [J]. | FRONTIERS IN MICROBIOLOGY , 2024 , 15 . |
MLA | Zhang, Peng et al. "Editorial: Microbial-driven carbon turnover from dry-wet cycling regions" . | FRONTIERS IN MICROBIOLOGY 15 (2024) . |
APA | Zhang, Peng , Luo, Min , Fu, Chuancheng , Xiao, Leilei . Editorial: Microbial-driven carbon turnover from dry-wet cycling regions . | FRONTIERS IN MICROBIOLOGY , 2024 , 15 . |
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海平面上升直接改变河口感潮沼泽的水文和盐度特征,是河口感潮沼泽面临的主要环境问题之一。总结了海平面上升对河口感潮沼泽碳动态影响的研究方法和实验平台,分别从海平面上升引发的盐水入侵和水淹增加2个方面综述海平面上升对河口感潮沼泽CH
Keyword :
水淹增加 水淹增加 河口感潮沼泽 河口感潮沼泽 海平面上升 海平面上升 盐水入侵 盐水入侵 碳动态 碳动态
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GB/T 7714 | 仝川 , 罗敏 , 胡敏杰 et al. 海平面上升对河口感潮沼泽湿地CH [J]. | 地球科学进展 , 2024 , 39 (05) : 441-453 . |
MLA | 仝川 et al. "海平面上升对河口感潮沼泽湿地CH" . | 地球科学进展 39 . 05 (2024) : 441-453 . |
APA | 仝川 , 罗敏 , 胡敏杰 , 王纯 , 刘白贵 , 展鹏飞 . 海平面上升对河口感潮沼泽湿地CH . | 地球科学进展 , 2024 , 39 (05) , 441-453 . |
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针对新时代背景下"双一流"高校人才培养的发展需求,在"三创五育"理念指导下,解析基于产学研合作理论引入的DIE模式的内涵,系统阐述了DIE理念贯彻下的教学系统设计并付诸实践,旨在打破教学系、研究所、企业之间的壁垒,为学生学习、实践提供更多样化的渠道.问卷调查结果表明DIE模式在本科生团队协作、学术创造、自信心树立等方面有切实作用,为培养全面发展的高素质本科人才提供了参考.
Keyword :
DIE模式 DIE模式 "三创五育" "三创五育" "双一流"高校 "双一流"高校 本科人才培养 本科人才培养
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GB/T 7714 | 许章华 , 张超飞 , 罗敏 et al. "三创五育"背景下"双一流"高校本科人才培养的DIE模式初探及评价 [J]. | 高等理科教育 , 2024 , (2) : 53-61 . |
MLA | 许章华 et al. ""三创五育"背景下"双一流"高校本科人才培养的DIE模式初探及评价" . | 高等理科教育 2 (2024) : 53-61 . |
APA | 许章华 , 张超飞 , 罗敏 , 杨远垚 , 刘智才 . "三创五育"背景下"双一流"高校本科人才培养的DIE模式初探及评价 . | 高等理科教育 , 2024 , (2) , 53-61 . |
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氮素是影响湿地甲烷代谢过程的重要因素之一.氮输入是否影响湿地甲烷排放,增加全球气候变暖的风险,一直受到科学界的高度关注.目前关于氮输入对湿地甲烷排放影响的几篇meta-analysis文章的主要结论均为氮输入促进湿地甲烷排放,但是多篇研究性论文的结果为氮输入抑制或不影响湿地甲烷排放,由此可见氮输入对湿地甲烷排放的影响十分复杂.湿地甲烷代谢包括湿地甲烷产生、氧化和传输过程以及最终的甲烷排放,综述不同形态氮输入对水稻田、内陆湿地和滨海湿地甲烷排放通量影响的复杂性;分析湿地甲烷产生速率和途径、甲烷好氧氧化和硝酸盐/亚硝酸盐型厌氧甲烷氧化对不同形态氮输入的响应及机制.硝态氮输入对湿地甲烷产生具有抑制作用已成共识,然而其它形态氮输入对湿地土壤甲烷产生的影响具有较大的不确定性,氮输入影响湿地甲烷产生的机制主要包括电子受体-底物竞争机制、离子毒性机制、促进植物生长-碳底物供给增加机制以及pH调控机制等.氮输入对湿地好氧甲烷氧化影响的研究多集中在水稻田和泥炭湿地,影响的结果包括促进、抑制或影响不显著;氮输入促进湿地土壤硝酸盐/亚硝酸盐型厌氧甲烷氧化.着重分析氮输入对湿地甲烷代谢影响不确定性的成因,指出湿地甲烷代谢对氮输入的响应是一个生态系统层面的生物地球化学过程,并提出氮输入是最具争议效应的驱动因素之一,其对甲烷代谢的影响很难得出明确的模式,可能需要考虑湿地土壤特征(本底氮含量、有机碳含量、土壤C:N值等)以及植物群落类型和特征,最后提出今后在氮输入对湿地甲烷代谢影响方面应加强的研究领域.
Keyword :
不确定性 不确定性 氮输入 氮输入 湿地 湿地 生态系统特征 生态系统特征 甲烷产生和氧化 甲烷产生和氧化 甲烷通量 甲烷通量
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GB/T 7714 | 仝川 , 罗敏 , 谭季 . 湿地甲烷代谢对氮输入响应的复杂性及其机制分析 [J]. | 生态学报 , 2024 , 44 (4) : 1324-1335 . |
MLA | 仝川 et al. "湿地甲烷代谢对氮输入响应的复杂性及其机制分析" . | 生态学报 44 . 4 (2024) : 1324-1335 . |
APA | 仝川 , 罗敏 , 谭季 . 湿地甲烷代谢对氮输入响应的复杂性及其机制分析 . | 生态学报 , 2024 , 44 (4) , 1324-1335 . |
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Rising sea levels have increased the risk of intense flooding in tidal wetlands, potentially leading to rises in soil iron-bound organic carbon (Fe-OC) contents by inhibiting microbial activity. However, flooding-induced Fe-OC accumulation may be attenuated by root activities of tidal wetland plants, which remains under-investigated in tidal wetlands. Here we established manipulative "marsh organ" filed experiments with soils collected from an oligohaline tidal wetland and introduced the indigenous plant species Phragmites australis (Cav.) Trin. ex Steud. These "marsh organ" mesocosms were then subjected to three flooding water-level treatments over a period of 3.5 years. Overall, root biomass, root porosity, and rhizosphere ferric iron-to-ferrous iron [Fe(III):Fe(II)] ratio increased with flooding levels, indicating that enhanced flooding promotes root oxygen loss of tidal wetland plants. The abundances of Fe-oxidizing bacteria (Gallionella) and Fe-reducing bacteria (Geobacter) increased, whereas the abundance of sulfate-reducing bacteria (dsrA gene) decreased with increased flooding, indicating a diversion of Fe from Fe-sulfur associations towards microbially-mediated Fe redox cycling. The soil organic carbon (SOC) pool did not change with increased flooding; however, the Fe-OC-to-SOC ratio (fFe-OC) increased from 9 to 18%. The fFe-OC was strongly related to soil amorphous Fe(III) concentrations and the activities of soil C-acquiring enzymes, both of which were affected by rhizosphere Fe(III):Fe(II) ratios. Thus, increased root oxygen loss, along with enhanced flooding, facilitated increases in amorphous Fe(III) concentrations and C acquiring enzyme activity. Increased soil amorphous Fe(III) concentrations further promoted Fe-OC accumulation, whereas increased soil C-acquiring enzyme activities reduced the labile organic C pool. Overall, the dominance of the Fe-OC pool increased under enhanced flooding, owing to increased oxygen loss from the roots. Therefore, we outlined that soil C stability will increase in tidal wetland ecosystems that are exposed to future sea-level rise.
Keyword :
Flooding Flooding Iron-bound organic carbon Iron-bound organic carbon Root oxygen loss Root oxygen loss Sea-level rise Sea-level rise Soil organic carbon Soil organic carbon Tidal wetland Tidal wetland
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GB/T 7714 | Hu, Dehong , Lan, Wenjing , Luo, Min et al. Increase in iron-bound organic carbon content under simulated sea-level rise: A "marsh organ" field experiment [J]. | SOIL BIOLOGY & BIOCHEMISTRY , 2023 , 187 . |
MLA | Hu, Dehong et al. "Increase in iron-bound organic carbon content under simulated sea-level rise: A "marsh organ" field experiment" . | SOIL BIOLOGY & BIOCHEMISTRY 187 (2023) . |
APA | Hu, Dehong , Lan, Wenjing , Luo, Min , Fan, Tianning , Chen, Xin , Tan, Ji et al. Increase in iron-bound organic carbon content under simulated sea-level rise: A "marsh organ" field experiment . | SOIL BIOLOGY & BIOCHEMISTRY , 2023 , 187 . |
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Two mesocosms, with and without plants, were established in the tidal wetlands of the Minjiang Estuary, Southeast China. Each mesocosm contained three elevation treatments: control (CK), CK-20cm, and CK-40cm. The CO2 and CH4 emission fluxes under each elevation treatment in the planted and unplanted mesocosms were investigated. Overall, the results showed that increased flooding did not significantly change the total biomass or stem heights of the plants, but it increased the belowground biomass and decreased the aboveground biomass. In the planted mesocosms, the soil redox potential (ORP) and dissolved organic carbon (DOC) concentration increased with increasing flooding. In the unplanted mesocosms, the DOC concentration also increased with increasing flooding, but the soil ORP did not change. In the planted mesocosms, compared to the CK treatment, CO2 emission flux increased by 43% and 61%, respectively and CH4 emission flux increased by 66% and 84%, respectively for the CK-20cm and CK-40cm treatments. In the unplanted mesocosms, the emission fluxes of CO2 and CH4 did not significantly change with increasing flooding. Within 50 to 100 years of sea level rises in the future, the sustained-flux global warming potential of vegetated tidal wetland will increase, while the soil organic carbon storage will decrease. Conversely, in unvegetated tidal wetlands, the sustained-flux global warming potential will decrease, while the storage of soil organic carbon will not change. © 2023 Chinese Society for Environmental Sciences. All rights reserved.
Keyword :
Biomass Biomass Carbon dioxide Carbon dioxide Floods Floods Global warming Global warming Organic carbon Organic carbon Redox reactions Redox reactions Sea level Sea level Soils Soils Wetlands Wetlands
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GB/T 7714 | Tan, Feng-Feng , Luo, Min , Zhang, Chang-Wei et al. Plants moderate the effects of emission fluxes of CO2 and CH4 on increased flooding in wetland soils [J]. | China Environmental Science , 2023 , 43 (1) : 424-435 . |
MLA | Tan, Feng-Feng et al. "Plants moderate the effects of emission fluxes of CO2 and CH4 on increased flooding in wetland soils" . | China Environmental Science 43 . 1 (2023) : 424-435 . |
APA | Tan, Feng-Feng , Luo, Min , Zhang, Chang-Wei , Chen, Xin , Huang, Jia-Fang . Plants moderate the effects of emission fluxes of CO2 and CH4 on increased flooding in wetland soils . | China Environmental Science , 2023 , 43 (1) , 424-435 . |
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Emissions of methane (CH4), a major greenhouse gas, should be cut by at least 30% by 2030 according to the last Conference of the Parties, CoP26. Aquaculture pond is a major CH4 emitter, yet the microbial mechanisms ruling methanogenesis by degradation of organic matter in sediments remain unclear. In particular, the respective roles of hydrogenotrophic and acetoclastic methanogenesis, and the impact of aquaculture farming practices are unknown. We studied methanogenesis in the surface sediments from a freshwater and an oligohaline pond before, during, and after shrimp farming. Hydrogenotrophic and acetoclastic contributions were distinguished by acetoclastic inhibition with methylfluoride (CH3F), and by C-13-analysis of CO2 and CH4. We also monitored the methanogenic community structure, dissolved organic carbon (DOC) levels, carbon to nitrogen (C/N) ratios, and humification indices derived from Fourier transform infrared spectroscopy. The results reveal that aquaculture farming practices increased methanogenesis rates, and these increases were explained by higher levels of DOC and lower C/N ratios during farming. Of the total methane produced, 51%-78% was by hydrogenotrophic methanogenesis. However, the total methane contribution from acetoclastic methanogenesis increased from approximately 22% before farming to approximately 45% during and after farming, with a decreasing isotope fractionation factor alpha c and an increasing relative abundance of Methanosaeta acetoclastic methanogen. All hu-mification indices decreased during and after farming compared to before farming due to the input of polysaccharide-rich aquafeed. The close relationship between the humification indices and methanogenesis pathways indicates that the changes in sediment substrate quality drove the variation in the methanogenesis pathways. Increases in salinity decreased the methanogenesis rates but did not change the methanogenesis pathways. Overall, our findings reveal that aquaculture farming practices increase methanogenesis rates and favor acetoclastic over hydrogenotrophic methanogenesis, and that adjusting shrimp diets, increasing salinity, and removing residual aquafeed could reduce methanogenesis.
Keyword :
Acetoclastic methanogenesis Acetoclastic methanogenesis Coastal aquaculture pond Coastal aquaculture pond Hydrogenotrophic methanogenesis Hydrogenotrophic methanogenesis Isotopic fractionation factors Isotopic fractionation factors Methane Methane Methanogenic community structure Methanogenic community structure
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GB/T 7714 | Tan, Ji , Lichtfouse, Eric , Luo, Min et al. Aquaculture drastically increases methane production by favoring acetoclastic rather than hydrogenotrophic methanogenesis in shrimp pond sediments [J]. | AQUACULTURE , 2023 , 563 . |
MLA | Tan, Ji et al. "Aquaculture drastically increases methane production by favoring acetoclastic rather than hydrogenotrophic methanogenesis in shrimp pond sediments" . | AQUACULTURE 563 (2023) . |
APA | Tan, Ji , Lichtfouse, Eric , Luo, Min , Liu, Yuxiu , Tan, Fengfeng , Zhang, Changwei et al. Aquaculture drastically increases methane production by favoring acetoclastic rather than hydrogenotrophic methanogenesis in shrimp pond sediments . | AQUACULTURE , 2023 , 563 . |
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