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Shu W, Zhang Q, Audet J, Li Z, Leng P, Qiao Y, Tian C, Chen G, Zhao J, Cheng H, Li F. Non-negligible N 2O emission hotspots: Rivers impacted by ion-adsorption rare earth mining. WATER RESEARCH 2024; 251:121124. [PMID: 38237464 DOI: 10.1016/j.watres.2024.121124] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 12/06/2023] [Accepted: 01/08/2024] [Indexed: 02/12/2024]
Abstract
Rare earth mining causes severe riverine nitrogen pollution, but its effect on nitrous oxide (N2O) emissions and the associated nitrogen transformation processes remain unclear. Here, we characterized N2O fluxes from China's largest ion-adsorption rare earth mining watershed and elucidated the mechanisms that drove N2O production and consumption using advanced isotope mapping and molecular biology techniques. Compared to the undisturbed river, the mining-affected river exhibited higher N2O fluxes (7.96 ± 10.18 mmol m-2d-1 vs. 2.88 ± 8.27 mmol m-2d-1, P = 0.002), confirming that mining-affected rivers are N2O emission hotspots. Flux variations scaled with high nitrogen supply (resulting from mining activities), and were mainly attributed to changes in water chemistry (i.e., pH, and metal concentrations), sediment property (i.e., particle size), and hydrogeomorphic factors (e.g., river order and slope). Coupled nitrification-denitrification and N2O reduction were the dominant processes controlling the N2O dynamics. Of these, the contribution of incomplete denitrification to N2O production was greater than that of nitrification, especially in the heavily mining-affected reaches. Co-occurrence network analysis identified Thiomonas and Rhodanobacter as the key genus closely associated with N2O production, suggesting their potential roles for denitrification. This is the first study to elucidate N2O emission and influential mechanisms in mining-affected rivers using combined isotopic and molecular techniques. The discovery of this study enhances our understanding of the distinctive processes driving N2O production and consumption in highly anthropogenically disturbed aquatic systems, and also provides the foundation for accurate assessment of N2O emissions from mining-affected rivers on regional and global scales.
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Affiliation(s)
- Wang Shu
- Shandong Yucheng Agro-Ecosystem National Observation and Research Station, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Sino-Danish College of University of Chinese Academy of Sciences, Beijing 101408, China; Sino-Danish Centre for Education and Research, Beijing 101408, China
| | - Qiuying Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Joachim Audet
- Department of Ecoscience, Aarhus University, C.F. Møllers Allé, Aarhus 8000, Denmark
| | - Zhao Li
- Shandong Yucheng Agro-Ecosystem National Observation and Research Station, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Peifang Leng
- Shandong Yucheng Agro-Ecosystem National Observation and Research Station, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Yunfeng Qiao
- Shandong Yucheng Agro-Ecosystem National Observation and Research Station, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Chao Tian
- Shandong Yucheng Agro-Ecosystem National Observation and Research Station, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Gang Chen
- Department of Civil and Environmental Engineering, Florida A&M University (FAMU)-Florida State University (FSU) Joint College of Engineering, 32310, United States
| | - Jun Zhao
- School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China
| | - Hefa Cheng
- MOE Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Fadong Li
- Shandong Yucheng Agro-Ecosystem National Observation and Research Station, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Sino-Danish College of University of Chinese Academy of Sciences, Beijing 101408, China.
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2
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Buessecker S, Sarno AF, Reynolds MC, Chavan R, Park J, Fontánez Ortiz M, Pérez-Castillo AG, Panduro Pisco G, Urquiza-Muñoz JD, Reis LP, Ferreira-Ferreira J, Furtunato Maia JM, Holbert KE, Penton CR, Hall SJ, Gandhi H, Boëchat IG, Gücker B, Ostrom NE, Cadillo-Quiroz H. Coupled abiotic-biotic cycling of nitrous oxide in tropical peatlands. Nat Ecol Evol 2022; 6:1881-1890. [PMID: 36202923 DOI: 10.1038/s41559-022-01892-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 08/26/2022] [Indexed: 12/15/2022]
Abstract
Atmospheric nitrous oxide (N2O) is a potent greenhouse gas thought to be mainly derived from microbial metabolism as part of the denitrification pathway. Here we report that in unexplored peat soils of Central and South America, N2O production can be driven by abiotic reactions (≤98%) highly competitive to their enzymatic counterparts. Extracted soil iron positively correlated with in situ abiotic N2O production determined by isotopic tracers. Moreover, we found that microbial N2O reduction accompanied abiotic production, essentially closing a coupled abiotic-biotic N2O cycle. Anaerobic N2O consumption occurred ubiquitously (pH 6.4-3.7), with proportions of diverse clade II N2O reducers increasing with consumption rates. Our findings show that denitrification in tropical peat soils is not a purely biological process but rather a 'mosaic' of abiotic and biotic reduction reactions. We predict that hydrological and temperature fluctuations differentially affect abiotic and biotic drivers and further contribute to the high N2O flux variation in the region.
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Affiliation(s)
- Steffen Buessecker
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
- Department of Earth System Science, Stanford University, Stanford, CA, USA
| | - Analissa F Sarno
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Mark C Reynolds
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Ramani Chavan
- Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Jin Park
- Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | | | - Ana G Pérez-Castillo
- Environmental Pollution Research Center (CICA), University of Costa Rica, Montes de Oca, Costa Rica
| | - Grober Panduro Pisco
- School of Forestry and Environmental Sciences, Ucayali National University, Ucayali, Peru
| | - José David Urquiza-Muñoz
- Laboratory of Soil Research, Research Institute of Amazonia's Natural Resources, National University of the Peruvian Amazon, Iquitos, Loreto, Peru
- School of Forestry, National University of the Peruvian Amazon, Iquitos, Loreto, Peru
- Department for Biogeochemical Processes, Max Planck Institute for Biogeochemistry, Jena, Germany
| | - Leonardo P Reis
- Mamiraua Institute for Sustainable Development, Amazonia, Brazil
| | | | - Jair M Furtunato Maia
- Normal Superior School, Amazonas State University, Manaus, Amazonia, Brazil
- National Institute of Amazonian Research, Manaus, Amazonia, Brazil
| | - Keith E Holbert
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ, USA
| | - C Ryan Penton
- College of Integrative Sciences and Arts, Arizona State University, Mesa, AZ, USA
| | - Sharon J Hall
- School of Life Sciences, Arizona State University, Tempe, AZ, USA
| | - Hasand Gandhi
- Department of Integrative Biology, Michigan State University, East Lansing, MI, USA
- DOE Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, MI, USA
| | - Iola G Boëchat
- Applied Limnology Laboratory, Department of Geosciences, Federal University of São João del-Rei, São João del-Rei, Brazil
| | - Björn Gücker
- Applied Limnology Laboratory, Department of Geosciences, Federal University of São João del-Rei, São João del-Rei, Brazil
| | - Nathaniel E Ostrom
- Department of Integrative Biology, Michigan State University, East Lansing, MI, USA
- DOE Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, MI, USA
| | - Hinsby Cadillo-Quiroz
- School of Life Sciences, Arizona State University, Tempe, AZ, USA.
- Biodesign Institute, Arizona State University, Tempe, AZ, USA.
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3
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Visser AN, Wankel SD, Frey C, Kappler A, Lehmann MF. Unchanged nitrate and nitrite isotope fractionation during heterotrophic and Fe(II)-mixotrophic denitrification suggest a non-enzymatic link between denitrification and Fe(II) oxidation. Front Microbiol 2022; 13:927475. [PMID: 36118224 PMCID: PMC9478938 DOI: 10.3389/fmicb.2022.927475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 07/29/2022] [Indexed: 11/13/2022] Open
Abstract
Natural-abundance measurements of nitrate and nitrite (NOx) isotope ratios (δ15N and δ18O) can be a valuable tool to study the biogeochemical fate of NOx species in the environment. A prerequisite for using NOx isotopes in this regard is an understanding of the mechanistic details of isotope fractionation (15ε, 18ε) associated with the biotic and abiotic NOx transformation processes involved (e.g., denitrification). However, possible impacts on isotope fractionation resulting from changing growth conditions during denitrification, different carbon substrates, or simply the presence of compounds that may be involved in NOx reduction as co-substrates [e.g., Fe(II)] remain uncertain. Here we investigated whether the type of organic substrate, i.e., short-chained organic acids, and the presence/absence of Fe(II) (mixotrophic vs. heterotrophic growth conditions) affect N and O isotope fractionation dynamics during nitrate (NO3–) and nitrite (NO2–) reduction in laboratory experiments with three strains of putative nitrate-dependent Fe(II)-oxidizing bacteria and one canonical denitrifier. Our results revealed that 15ε and 18ε values obtained for heterotrophic (15ε-NO3–: 17.6 ± 2.8‰, 18ε-NO3–:18.1 ± 2.5‰; 15ε-NO2–: 14.4 ± 3.2‰) vs. mixotrophic (15ε-NO3–: 20.2 ± 1.4‰, 18ε-NO3–: 19.5 ± 1.5‰; 15ε-NO2–: 16.1 ± 1.4‰) growth conditions are very similar and fall within the range previously reported for classical heterotrophic denitrification. Moreover, availability of different short-chain organic acids (succinate vs. acetate), while slightly affecting the NOx reduction dynamics, did not produce distinct differences in N and O isotope effects. N isotope fractionation in abiotic controls, although exhibiting fluctuating results, even expressed transient inverse isotope dynamics (15ε-NO2–: –12.4 ± 1.3 ‰). These findings imply that neither the mechanisms ordaining cellular uptake of short-chain organic acids nor the presence of Fe(II) seem to systematically impact the overall N and O isotope effect during NOx reduction. The similar isotope effects detected during mixotrophic and heterotrophic NOx reduction, as well as the results obtained from the abiotic controls, may not only imply that the enzymatic control of NOx reduction in putative NDFeOx bacteria is decoupled from Fe(II) oxidation, but also that Fe(II) oxidation is indirectly driven by biologically (i.e., via organic compounds) or abiotically (catalysis via reactive surfaces) mediated processes co-occurring during heterotrophic denitrification.
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Affiliation(s)
- Anna-Neva Visser
- Aquatic and Isotope Biogeochemistry, Department of Environmental Sciences, Basel University, Basel, Switzerland
- *Correspondence: Anna-Neva Visser,
| | - Scott D. Wankel
- Stable Isotope Biogeochemistry, Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Falmouth, MA, United States
| | - Claudia Frey
- Aquatic and Isotope Biogeochemistry, Department of Environmental Sciences, Basel University, Basel, Switzerland
| | - Andreas Kappler
- Geomicrobiology, Center for Applied Geosciences, Eberhard Karls University, Tuebingen, Germany
- Cluster of Excellence: EXC 2124: Controlling Microbes to Fight Infection, Tuebingen, Germany
| | - Moritz F. Lehmann
- Aquatic and Isotope Biogeochemistry, Department of Environmental Sciences, Basel University, Basel, Switzerland
- Moritz F. Lehmann,
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4
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Nitrous Oxide from Abiotic Processes of Hydroxylamine and Nitrite in Estuarine and Coastal Ecosystems: A Review. JOURNAL OF MARINE SCIENCE AND ENGINEERING 2022. [DOI: 10.3390/jmse10050623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abiotic processes of nitrogen (N) are suggested to contribute to nitrous oxide (N2O) production; however, the important role of these processes in N2O emissions is invariably ignored. This review synthesized the main abiotic processes of hydroxylamine and nitrite and associated biogeochemical controls in estuarine and coastal ecosystems. Abiotic processes of hydroxylamine and nitrite are availably detected in estuarine and coastal environments. The abiotic processes of hydroxylamine contribute more to N2O production than the abiotic processes of nitrite in estuarine and coastal environments, suggesting that hydroxylamine plays an important role in N2O production. The isotopic fractionation effects of N can occur during the abiotic processes of hydroxylamine and nitrite and are enriched with the increasing rates of N reactions. In addition, abiotic processes of hydroxylamine and nitrite are highly dependent on pH, oxygen, Fe2+, Fe3+, and Mn4+ and are also triggered by the increasing substrate contents. These results suggest that abiotic processes of hydroxylamine and nitrite have been greatly concerned for the estuarine and coastal environments, whereas the dynamics of these processes are still sparse for projecting N fates and dynamics in response to environmental factors changes. This review highlights the importance of abiotic processes of N and associated environmental implications and presents the future trend of N cycling in estuarine and coastal environments.
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5
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Epova EY, Shevelev AB, Akbayev RM, Biryukova YK, Zylkova MV, Bogdanova ES, Guseva MA, Tynio YY, Egorov VV. Heterotrophic Microbiota from the Oligotrophic Waters of Lake Vostok, Antarctica. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19074025. [PMID: 35409708 PMCID: PMC8998000 DOI: 10.3390/ijerph19074025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/26/2022] [Accepted: 03/27/2022] [Indexed: 11/16/2022]
Abstract
Lake Vostok is the deepest lake of Antarctica but has poor accessibility for study due to a thick glacial cover, however, water samples of this lake have become available for study just recently. Previously, only the microbiome of the ice cover samples was characterized. Here we report results of bacteriological seeding with subsequent identification of the heterotrophic microorganisms (bacteria and micellar fungi) present by 16S rDNA sequencing as well as results of a direct molecular study of the water microbiome. Surprisingly, the data obtained gave evidence of a predominant occurrence of common chemoorganotrophs that were rather psychrotolerant than psychrophilic. We isolated and described strains belonging to eight heterotrophic microbial species able to grow in a rich medium: six bacterial strains belonging to the species Microbacterium testaceum and Microbacterium trichothecenolyticum, Brevundimonas diminuta, Sphingomonas oligophenolica, Sphingomonas sp. and Sphingobium limneticum; and two fungal strains belonging to Dendryphion sp. and Cladosporium fusiforme. Direct study of 16S rDNA purified water samples confirmed the predominance of the Brevundimonas, Microbacterium, Bradyrhizobium, and Bacillus (Bacillus cereus) genera.
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Affiliation(s)
- Ekaterina Y. Epova
- Vavilov Institute of General Genetics, Russian Academy of Sciences, 119991 Moscow, Russia; (E.Y.E.); (A.B.S.); (M.V.Z.); (E.S.B.); (M.A.G.); (Y.Y.T.)
| | - Alexei B. Shevelev
- Vavilov Institute of General Genetics, Russian Academy of Sciences, 119991 Moscow, Russia; (E.Y.E.); (A.B.S.); (M.V.Z.); (E.S.B.); (M.A.G.); (Y.Y.T.)
| | - Ramazan M. Akbayev
- Skryabin Moscow State Academy of Veterinary Medicine and Biotechnology, 109472 Moscow, Russia; (R.M.A.); (V.V.E.)
| | - Yulia K. Biryukova
- Vavilov Institute of General Genetics, Russian Academy of Sciences, 119991 Moscow, Russia; (E.Y.E.); (A.B.S.); (M.V.Z.); (E.S.B.); (M.A.G.); (Y.Y.T.)
- Correspondence: ; Tel.: +7-909-682-85-61
| | - Marina V. Zylkova
- Vavilov Institute of General Genetics, Russian Academy of Sciences, 119991 Moscow, Russia; (E.Y.E.); (A.B.S.); (M.V.Z.); (E.S.B.); (M.A.G.); (Y.Y.T.)
| | - Elena S. Bogdanova
- Vavilov Institute of General Genetics, Russian Academy of Sciences, 119991 Moscow, Russia; (E.Y.E.); (A.B.S.); (M.V.Z.); (E.S.B.); (M.A.G.); (Y.Y.T.)
| | - Marina A. Guseva
- Vavilov Institute of General Genetics, Russian Academy of Sciences, 119991 Moscow, Russia; (E.Y.E.); (A.B.S.); (M.V.Z.); (E.S.B.); (M.A.G.); (Y.Y.T.)
| | - Yaroslav Y. Tynio
- Vavilov Institute of General Genetics, Russian Academy of Sciences, 119991 Moscow, Russia; (E.Y.E.); (A.B.S.); (M.V.Z.); (E.S.B.); (M.A.G.); (Y.Y.T.)
| | - Vladislav V. Egorov
- Skryabin Moscow State Academy of Veterinary Medicine and Biotechnology, 109472 Moscow, Russia; (R.M.A.); (V.V.E.)
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6
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Wei J, Zhang X, Xia L, Yuan W, Zhou Z, Brüggmann N. Role of chemical reactions in the nitrogenous trace gas emissions and nitrogen retention: A meta-analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 808:152141. [PMID: 34871694 DOI: 10.1016/j.scitotenv.2021.152141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 11/07/2021] [Accepted: 11/28/2021] [Indexed: 06/13/2023]
Abstract
Increasing evidence has been found that chemical reactions affect significantly the terrestrial nitrogen (N) cycle, which was previously assumed to be mainly dominated by biological processes. Due to the limitation of knowledge and analytical techniques, it is currently challenging to discern the contribution of biotic and abiotic processes to the terrestrial N cycle for geobiologists and biogeochemists alike. To better understand the role of abiotic reactions in the terrestrial N cycle, it is necessary to comprehend the chemical controls on nitrogenous trace gas emissions and N retention in soil under various environmental conditions. In this manuscript, we assess the role of abiotic reactions in nitrous oxide (N2O) and nitric oxide (NO) emissions as well as N retention through a meta-analysis using all related peer-reviewed publications before August 2020. Results show that abiotic reactions contributed 29.3-37.7% and 44.0-57.0% to the total N2O emission and N retention, representing 3.7-4.7 and 4.0-6.0 Tg year-1 of global terrestrial N2O emission and N retention, respectively. Much higher NO production was observed in sterilized soils than that in unsterilized treatments indicating the major contribution of chemical reactions to NO emission and rapid microbial reduction of NO to N2O and N2. Chemical hydroxylamine oxidation accounts for the largest abiotic contribution to N2O emission, while chemical nitrite reduction and fixation represent for the largest contribution to abiotic NO production and soil N retention, respectively. Factors influencing the abiotic processes include pH, total organic carbon (TOC), total nitrogen (TN), the ratio of carbon to nitrogen (C/N), and transition metals. These results broadened our knowledge about the mechanisms involved in chemical N reactions and provided a simplified estimation about their contribution to nitrogenous trace gas emission and N retention, which is meaningful to further study interactions of biologically and chemically mediated reactions in biogeochemical N cycle.
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Affiliation(s)
- Jing Wei
- School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, Guangdong 519082, China; Forschungszentrum Jülich GmbH, Institute of Bio- and Geosciences, Agrosphere (IBG-3), Wilhelm-Johnen-Straße, 52425 Jülich, Germany; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, Guangdong 519082, China.
| | - Xinying Zhang
- College of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China
| | - Longlong Xia
- Institute for Meteorology and Climate Research (IMK-IFU), Karlsruhe Institute of Technology, Garmisch-Partenkirchen 82467, Germany
| | - Wenping Yuan
- School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, Guangdong 519082, China; Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Zhuhai 519082, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, Guangdong 519082, China
| | - Zhanyan Zhou
- School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, Guangdong 519082, China
| | - Nicolas Brüggmann
- Forschungszentrum Jülich GmbH, Institute of Bio- and Geosciences, Agrosphere (IBG-3), Wilhelm-Johnen-Straße, 52425 Jülich, Germany
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7
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Murphy AE, Bulseco AN, Ackerman R, Vineis JH, Bowen JL. Sulphide addition favours respiratory ammonification (DNRA) over complete denitrification and alters the active microbial community in salt marsh sediments. Environ Microbiol 2020; 22:2124-2139. [DOI: 10.1111/1462-2920.14969] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Revised: 02/14/2020] [Accepted: 02/28/2020] [Indexed: 11/28/2022]
Affiliation(s)
- Anna E. Murphy
- Department of Marine and Environmental Sciences Marine Science Center, Northeastern University Nahant Massachusetts 01908 USA
- INSPIRE Environmental, Inc 513 Broadway Suite 314, Newport Rhode Island 02840 USA
| | - Ashley N. Bulseco
- Department of Marine and Environmental Sciences Marine Science Center, Northeastern University Nahant Massachusetts 01908 USA
- The Ecosystems Center Marine Biological Laboratory Woods Hole Massachusetts 02543 USA
| | - Ross Ackerman
- Biology Department, Bates College Lewiston Maine 04240 USA
| | - Joseph H. Vineis
- Department of Marine and Environmental Sciences Marine Science Center, Northeastern University Nahant Massachusetts 01908 USA
| | - Jennifer L. Bowen
- Department of Marine and Environmental Sciences Marine Science Center, Northeastern University Nahant Massachusetts 01908 USA
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8
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Du ZY, Zienkiewicz K, Vande Pol N, Ostrom NE, Benning C, Bonito GM. Algal-fungal symbiosis leads to photosynthetic mycelium. eLife 2019; 8:47815. [PMID: 31307571 PMCID: PMC6634985 DOI: 10.7554/elife.47815] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 06/17/2019] [Indexed: 12/23/2022] Open
Abstract
Mutualistic interactions between free-living algae and fungi are widespread in nature and are hypothesized to have facilitated the evolution of land plants and lichens. In all known algal-fungal mutualisms, including lichens, algal cells remain external to fungal cells. Here, we report on an algal-fungal interaction in which Nannochloropsis oceanica algal cells become internalized within the hyphae of the fungus Mortierella elongata. This apparent symbiosis begins with close physical contact and nutrient exchange, including carbon and nitrogen transfer between fungal and algal cells as demonstrated by isotope tracer experiments. This mutualism appears to be stable, as both partners remain physiologically active over months of co-cultivation, leading to the eventual internalization of photosynthetic algal cells, which persist to function, grow and divide within fungal hyphae. Nannochloropsis and Mortierella are biotechnologically important species for lipids and biofuel production, with available genomes and molecular tool kits. Based on the current observations, they provide unique opportunities for studying fungal-algal mutualisms including mechanisms leading to endosymbiosis.
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Affiliation(s)
- Zhi-Yan Du
- Department of Energy-Plant Research Laboratory, Michigan State University, East Lansing, United States.,Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, United States.,Department of Plant Biology, Michigan State University, East Lansing, United States
| | - Krzysztof Zienkiewicz
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, United States.,Department of Plant Biochemistry, Albrecht-von-Haller-Institute for Plant Sciences, Georg-August-University, Göttingen, Germany.,Centre of Modern Interdisciplinary Technologies, Nicolaus Copernicus University in Toruń, Toruń, Poland
| | - Natalie Vande Pol
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, United States
| | - Nathaniel E Ostrom
- Department of Integrative Biology, Michigan State University, East Lansing, United States.,DOE Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, United States
| | - Christoph Benning
- Department of Energy-Plant Research Laboratory, Michigan State University, East Lansing, United States.,DOE Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, United States.,Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, United States.,Department of Plant Biology, Michigan State University, East Lansing, United States
| | - Gregory M Bonito
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, United States.,DOE Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, United States.,Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, United States
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9
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Liu T, Chen D, Li X, Li F. Microbially mediated coupling of nitrate reduction and Fe(II) oxidation under anoxic conditions. FEMS Microbiol Ecol 2019; 95:5371120. [DOI: 10.1093/femsec/fiz030] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 03/06/2019] [Indexed: 11/12/2022] Open
Affiliation(s)
- Tongxu Liu
- Guangzhou Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou 510650, P. R. China
| | - Dandan Chen
- Guangzhou Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou 510650, P. R. China
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiaomin Li
- The Environmental Research Institute, MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, P. R. China
| | - Fangbai Li
- Guangzhou Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou 510650, P. R. China
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10
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Hyodo A, Malghani S, Zhou Y, Mushinski RM, Toyoda S, Yoshida N, Boutton TW, West JB. Biochar amendment suppresses N 2 O emissions but has no impact on 15 N site preference in an anaerobic soil. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2019; 33:165-175. [PMID: 30304571 DOI: 10.1002/rcm.8305] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 10/03/2018] [Accepted: 10/04/2018] [Indexed: 06/08/2023]
Abstract
RATIONALE Biochar amendments often decrease N2 O gas production from soil, but the mechanisms and magnitudes are still not well characterized since N2 O can be produced via several different microbial pathways. We evaluated the influence of biochar amendment on N2 O emissions and N2 O isotopic composition, including 15 N site preference (SP) under anaerobic conditions. METHODS An agricultural soil was incubated with differing levels of biochar. Incubations were conducted under anaerobic conditions for 10 days with and without acetylene, which inhibits N2 O reduction to N2 . The N2 O concentrations were measured every 2 days, the SPs were determined after 5 days of incubation, and the inorganic nitrogen concentrations were measured after the incubation. RESULTS The SP values with acetylene were consistent with N2 O production by bacterial denitrification and those without acetylene were consistent with bacterial denitrification that included N2 O reduction to N2 . There was no effect of biochar on N2 O production in the presence of acetylene between day 3 and day 10. However, in the absence of acetylene, soils incubated with 4% biochar produced less N2 O than soils with no biochar addition. Different amounts of biochar amendment did not change the SP values. CONCLUSIONS Our study used N2 O emission rates and SP values to understand biochar amendment mechanisms and demonstrated that biochar amendment reduces N2 O emissions by stimulating the last step of denitrification. It also suggested a possible shift in N2 O-reducing microbial taxa in 4% biochar samples.
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Affiliation(s)
- Ayumi Hyodo
- Department of Ecosystem Science and Management, Texas A&M University, College Station, TX, 77843, USA
| | - Saadatullah Malghani
- Department of Ecosystem Science and Management, Texas A&M University, College Station, TX, 77843, USA
- School of Civil and Environmental Engineering, Yonsei University, Yonsei-ro 50 Saedaemun-gu, Seoul, 03722, South Korea
| | - Yong Zhou
- Department of Ecosystem Science and Management, Texas A&M University, College Station, TX, 77843, USA
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, 06511, USA
| | - Ryan M Mushinski
- Department of Ecosystem Science and Management, Texas A&M University, College Station, TX, 77843, USA
- School of Public and Environmental Affairs, Indiana University, Bloomington, IN, 47405, USA
| | - Sakae Toyoda
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Naohiro Yoshida
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
- Earth-Life Science Institute, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Thomas W Boutton
- Department of Ecosystem Science and Management, Texas A&M University, College Station, TX, 77843, USA
| | - Jason B West
- Department of Ecosystem Science and Management, Texas A&M University, College Station, TX, 77843, USA
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11
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Stanton CL, Reinhard CT, Kasting JF, Ostrom NE, Haslun JA, Lyons TW, Glass JB. Nitrous oxide from chemodenitrification: A possible missing link in the Proterozoic greenhouse and the evolution of aerobic respiration. GEOBIOLOGY 2018; 16:597-609. [PMID: 30133143 DOI: 10.1111/gbi.12311] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 06/23/2018] [Accepted: 07/02/2018] [Indexed: 05/26/2023]
Abstract
The potent greenhouse gas nitrous oxide (N2 O) may have been an important constituent of Earth's atmosphere during Proterozoic (~2.5-0.5 Ga). Here, we tested the hypothesis that chemodenitrification, the rapid reduction of nitric oxide by ferrous iron, would have enhanced the flux of N2 O from ferruginous Proterozoic seas. We empirically derived a rate law, d N 2 O d t = 7.2 × 10 - 5 [ Fe 2 + ] 0.3 [ NO ] 1 , and measured an isotopic site preference of +16‰ for the reaction. Using this empirical rate law, and integrating across an oceanwide oxycline, we found that low nM NO and μM-low mM Fe2+ concentrations could have sustained a sea-air flux of 100-200 Tg N2 O-N year-1 , if N2 fixation rates were near-modern and all fixed N2 was emitted as N2 O. A 1D photochemical model was used to obtain steady-state atmospheric N2 O concentrations as a function of sea-air N2 O flux across the wide range of possible pO2 values (0.001-1 PAL). At 100-200 Tg N2 O-N year-1 and >0.1 PAL O2 , this model yielded low-ppmv N2 O, which would produce several degrees of greenhouse warming at 1.6 ppmv CH4 and 320 ppmv CO2 . These results suggest that enhanced N2 O production in ferruginous seawater via a previously unconsidered chemodenitrification pathway may have helped to fill a Proterozoic "greenhouse gap," reconciling an ice-free Mesoproterozoic Earth with a less luminous early Sun. A particularly notable result was that high N2 O fluxes at intermediate O2 concentrations (0.01-0.1 PAL) would have enhanced ozone screening of solar UV radiation. Due to rapid photolysis in the absence of an ozone shield, N2 O is unlikely to have been an important greenhouse gas if Mesoproterozoic O2 was 0.001 PAL. At low O2 , N2 O might have played a more important role as life's primary terminal electron acceptor during the transition from an anoxic to oxic surface Earth, and correspondingly, from anaerobic to aerobic metabolisms.
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Affiliation(s)
- Chloe L Stanton
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia
- Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania
| | - Christopher T Reinhard
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia
| | - James F Kasting
- Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania
| | - Nathaniel E Ostrom
- Department of Integrative Biology, Michigan State University, East Lansing, Michigan
- DOE Great Lakes Bioenergy Research Institute, Michigan State University, East Lansing, Michigan
| | - Joshua A Haslun
- Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan
| | - Timothy W Lyons
- Department of Earth Sciences, University of California, Riverside, California
| | - Jennifer B Glass
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia
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12
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Bryce C, Blackwell N, Schmidt C, Otte J, Huang YM, Kleindienst S, Tomaszewski E, Schad M, Warter V, Peng C, Byrne JM, Kappler A. Microbial anaerobic Fe(II) oxidation - Ecology, mechanisms and environmental implications. Environ Microbiol 2018; 20:3462-3483. [DOI: 10.1111/1462-2920.14328] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 06/15/2018] [Accepted: 06/16/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Casey Bryce
- Geomicrobiology; University of Tübingen; Tübingen Germany
| | - Nia Blackwell
- Geomicrobiology; University of Tübingen; Tübingen Germany
| | | | - Julia Otte
- Geomicrobiology; University of Tübingen; Tübingen Germany
| | - Yu-Ming Huang
- Geomicrobiology; University of Tübingen; Tübingen Germany
| | | | | | - Manuel Schad
- Geomicrobiology; University of Tübingen; Tübingen Germany
| | - Viola Warter
- Geomicrobiology; University of Tübingen; Tübingen Germany
| | - Chao Peng
- Geomicrobiology; University of Tübingen; Tübingen Germany
| | - James M. Byrne
- Geomicrobiology; University of Tübingen; Tübingen Germany
| | - Andreas Kappler
- Geomicrobiology; University of Tübingen; Tübingen Germany
- Center for Geomicrobiology, Department of Bioscience; Aarhus University; Aarhus Denmark
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13
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Wang Y, Cao W, Zhang X, Guo J. Abiotic nitrate loss and nitrogenous trace gas emission from Chinese acidic forest soils. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:22679-22687. [PMID: 28815366 DOI: 10.1007/s11356-017-9797-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 07/19/2017] [Indexed: 06/07/2023]
Abstract
There are an increasing number of studies, which have shown the potential importance of abiotic denitrification in nitrogen biogeochemistry through pure chemical coupling between nitrate/nitrite reduction and Fe(II) oxidation. However, there is little direct evidence showing the environmental significance of abiotic nitrate (NO3-) reduction in acidic soils. We assessed the magnitude and gaseous product stoichiometry of abiotic nitrate reduction in acidic forest soils based on sterilized anoxic soil incubations at different soil pHs and nitrate loadings. The results showed that 24.9, 53.4, and 88.7% of added nitrate (70 mg N kg-1) were lost during 15 days incubation at pHs 3.9, 4.8, and 5.6, respectively. Nitrous oxide (N2O) was found as the dominant gaseous product of abiotic nitrate reduction, accounting for 5.0, 28.9, and 47.9% of nitrate losses at three pH levels, respectively. Minor but clear NO accumulations were observed for all nitrate-amended treatments, with the maxima at intermediate pH 4.8. The percentage of NO increased significantly with soil pH decline, leading to a negative correlation between NO/N2O ratio and soil pH. Though saturations were found under excessive nitrogen loading (i.e., 140 mg N kg-1), we still pose that abiotic nitrate reduction may represent a potentially important pathway for nitrate loss from acidic forest soils receiving nitrogen deposition. Our results here highlight the importance of abiotic nitrate reduction in the soil nitrogen cycle, with special relevance to nitrate removal and nitrogenous trace gas (NO and N2O) emissions from acidic soils.
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Affiliation(s)
- Yajing Wang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, China Agricultural University, Beijing, 100193, China
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Wenchao Cao
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Xinmu Zhang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, China Agricultural University, Beijing, 100193, China
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Jingheng Guo
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, China Agricultural University, Beijing, 100193, China.
- College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China.
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