Article
Environmental Sciences
Maria Schuck, Maria Greger
Summary: This study compared the chloride removal capacity of 34 wetland plant species native to Sweden and further examined the salt tolerance and tissue chloride concentration of Carex pseudocyperus, C. riparia, and Phalaris arundinacea. The results showed variations in chloride removal capacity, accumulation, and tolerance among the species. C. riparia and P. arundinacea were identified as suitable candidates for further phytodesalination studies due to their high tolerance, large biomass, and high accumulation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Cheng Cheng, Jian Zhang, Qiang He, Haiming Wu, Yi Chen, Huijun Xie, Spyros G. Pavlostathis
Summary: This study found that under anoxic conditions, the consumption of N2O can drive the oxidation of CH4, mainly mediated by methanotrophs in the microbial community. The research reveals the potential mechanisms of N2O-driven CH4 oxidation and highlights the significant role of methanotrophs in carbon and nitrogen cycles.
Article
Geosciences, Multidisciplinary
Syed Azharuddin, Pawan Govil, Ravi Mishra, Shailesh Agrawal, Arun Deo Singh
Summary: The study analyzed sediment samples from the upper margin of the Oxygen Minimum Zone (OMZ) in the Arabian Sea to reconstruct the biogeochemical response during the Early-Middle Holocene. The results showed that the OMZ conditions were relatively mild during the early Holocene and intensified during the mid-Holocene. The findings are consistent with other denitrification records in the Arabian Sea, indicating large-scale changes in the OMZ during the mid-Holocene.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Neha Sharma, Elaine D. Flynn, Jeffrey G. Catalano, Daniel E. Giammar
Summary: Denitrification is an important process mediated by microorganisms that can be influenced by the presence of copper. This study found that adding trace amounts of copper enhanced the reduction rate of nitrous oxide (N2O) to nitrogen gas (N2) in wetland soils and stream sediments. A kinetic model showed that the presence of copper significantly increased the conversion of N2O to N2. The study also suggested that in some cases, the overall denitrification process is driven by abiotic reduction of nitrite (NO2-). These findings highlight the significance of copper in controlling denitrification in natural aquatic systems.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Microbiology
Zhiyue Wang, Nisha Vishwanathan, Sophie Kowaliczko, Satoshi Ishii
Summary: This study compared the N2O reduction kinetics of different bacteria under aerobic and anaerobic conditions and categorized them into oxygen-tolerant, sensitive, and intolerant N2O reducers. It was found that the ability to tolerate oxygen was not directly related to the structure of N2O reductase but rather to the scavenging of oxygen in the cells and/or accessory proteins encoded by the nos cluster.
MICROBIOLOGY SPECTRUM
(2023)
Review
Environmental Sciences
Khushboo Gupta, Raushan Kumar, Kushal Kumar Baruah, Samarendra Hazarika, Susmita Karmakar, Nirmali Bordoloi
Summary: Agricultural soil, especially rice paddies, play a significant role in emitting greenhouse gases such as methane and nitrous oxide. Understanding the mechanisms and factors influencing the production and release of these gases is crucial in developing strategies to reduce emissions and mitigate global climate change impacts.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Dongdan Yuan, Lei Zheng, Yong-Xin Liu, Hongguang Cheng, Aizhong Ding, Xiaomin Wang, Qiuyang Tan, Xue Wang, Yuzi Xing, En Xie, Haoming Wu, Shanyun Wang, Guibing Zhu
Summary: Through the use of double tracer technique and metagenomic sequencing, we found that the production of N2O in plateau wetlands is promoted by nitrifier denitrification, with the key functional genes belonging to comammox bacteria Nitrospira nitrificans. The comammox bacterial species N. nitrificans and ammonia oxidizing bacterial species Nitrosomonas europaea cooperate to produce N2O in plateau wetland sediments. Environmental factors such as elevation and total organic matter influence the cooperation pattern via N. nitrificans, thus affecting N2O production activity in plateau wetland sediments.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Chengliang Zhang, Xiaojun Wang, Lai Wei, Boguang Wang, Shaohua Chen
Summary: The study found that N2O emissions in landfill reservoirs are mainly from heterotrophic denitrification, with higher release under 0% and 21% oxygen concentrations. Significant differences in richness and diversity of denitrifying bacterial communities were observed in the simulated landfill.
ENVIRONMENT INTERNATIONAL
(2021)
Article
Environmental Sciences
Veeraswamy Davamani, Ramesh Poornima, Subramanian Arulmani, Ettiyagounder Parameswari, Joseph Ezra John, Mohan Deepasri
Summary: The impact of nitrous oxide emissions from fertilized agro-ecosystems is a growing concern, but controlling fertilizer requirements and using nitrification inhibitors can effectively reduce N2O emissions. In irrigated tomato cultivation, the use of potassium thiosulfate and neem-coated urea resulted in lower N2O emissions and increased nitrogen retention.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Soil Science
Liuqing Yang, Xiaojun Zhang, Xiaotang Ju, Di Wu
Summary: Oxygen plays a crucial role in regulating the expression of N-cycle-related genes and nitrogenous gas production in soil. Increasing ammonium application accelerates oxygen consumption in the headspace and induces higher N2O accumulation under oxic conditions. Changes in oxygen status significantly impact the structure of soil microbiota.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Article
Engineering, Environmental
Xiangyu Chen, Jing Yang, Raymond Jianxiong Zeng, Shuping Qin, Xing Liu, Yuzhen Zhang, Shungui Zhou, Man Chen
Summary: Reactive oxygen species (ROS) have been found to play an essential role in promoting N2O emissions in soil/sediment during the anoxic-oxic transition. ROS inhibits the rate of nitrate reduction and increases N2O emissions by inhibiting the step of N2O reduction. Hydrogen peroxide is the dominant ROS species inhibiting N2O reduction, while hydroxyl radicals have negligible effects.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Carla Eloisa Diniz dos Santos, Rachel Biancalana Costa, Camila Abreu Borges Silva Rabelo, Antonio Djalma Nunes Ferraz Junior, Gabriela Felix Persinoti, Eloisa Pozzi, Eugenio Foresti, Marcia Helena Rissato Zamariolli Damianovic
Summary: The microbial community in a structured-bed reactor was able to adapt to different organic and nitrogen loads and shift according to changes in the C/N ratio, with no impact on reactor performance in terms of COD and Total-N removal. Under different C/N ratios, different bacterial families prevailed, including those capable of using organic matter, ammonia oxidizers, aerobic denitrifiers, and Anammox bacteria. The stratification of aerobic, anoxic, and anaerobic zones enabled the establishment of various nitrogen degradation pathways within the reactor.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2021)
Article
Engineering, Environmental
M. Beier, I Feldkaemper, A. Freyschmidt
Summary: A new approach has been developed to forecast biological N2O formation and emission at high-strength reject water treatment, which was calibrated and evaluated through extensive batch tests and long-term measurement campaigns. The proposed modelling approach has proven to accurately represent the observed trends of N2O formation, emission, and reduction, allowing for a reliable estimation of N2O emissions under different operational conditions.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Lei Huang, Haifeng Xiong, Chunli Jiang, Jinke He, Wanlin Lyu, Yucheng Chen
Summary: Constructed wetlands (CWs) with biochar addition showed enhanced removal rates for NH4+-N, total nitrogen, and chemical oxygen demand, while reducing N2O emissions. Nitrous oxide (N2O) emission was mainly contributed by nitrification, denitrification, and simultaneous nitrification and denitrification processes. Adding biochar resulted in significant reduction rates for these processes. The relative abundance of nitrogen-transforming microbes increased after biochar addition, promoting nitrogen removal and reducing N2O emissions. Functional gene copy number and enzyme activity responsible for nitrogen conversion were increased with biochar addition, facilitating efficient NH4+-N oxidation and nitrite elimination, thus reducing N2O emissions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Ping Yang, Kam W. Tang, Chuan Tong, Derrick Y. F. Lai, Linhai Zhang, Xiao Lin, Hong Yang, Lishan Tan, Yifei Zhang, Yan Hong, Chen Tang, Yongxin Lin
Summary: Land reclamation poses a major threat to coastal wetlands worldwide and its effects on the nitrogen biogeochemical cycling in coastal regions are still poorly understood. In this study, the N2O emissions from a brackish marsh and converted shrimp aquaculture ponds in Southeast China were compared over a three-year period. The results showed that the aquaculture ponds had significantly lower N2O emissions compared to the marsh, which could be attributed to diminished nutrient input, changes in microbial community, and lower N2O production capacity of the sediment. Better management of pond water and sediment could further mitigate N2O emissions from aquaculture operations.
Article
Ecology
Janet S. Prevey, Sarah Claire Elmendorf, Anne Bjorkman, Juha M. Alatalo, Isabel Ashton, Jakob J. Assmann, Robert G. Bjork, Mats P. Bjorkman, Nicoletta Cannone, Michele Carbognani, Chelsea Chisholm, Karin Clark, Courtney G. Collins, Elisabeth J. Cooper, Bo Elberling, Esther R. Frei, Gregory R. H. Henry, Robert D. Hollister, Toke Thomas Hoye, Ingibjorg Svala Jonsdottir, Jeffrey T. Kerby, Kari Klanderud, Christopher Kopp, Esther Levesque, Marguerite Mauritz, Ulf Molau, Isla H. Myers-Smith, Susan M. Natali, Steven F. Oberbauer, Zoe Panchen, Alessandro Petraglia, Eric Post, Christian Rixen, Heidi Rodenhizer, Sabine B. Rumpf, Niels Martin Schmidt, Ted Schuur, Philipp Semenchuk, Jane Griffin Smith, Katharine Suding, Orjan Totland, Tiffany Troxler, Henrik Wahren, Jeffrey M. Welker, Sonja Wipf, Yue Yang
Summary: Observations of phenology changes in tundra study areas provide strong evidence of the impact of climate change on terrestrial ecosystems. The International Tundra Experiment established a protocol to measure plant phenology globally, and the collected data over the decades show the responses of plants in colder regions to temperature changes. The database contains over 150,434 phenology observations of 278 plant species from 28 study areas, ranging from 1 to 26 years.
Article
Environmental Sciences
Laura H. Rasmussen, Wenxin Zhang, Per Ambus, Per-Erik Jansson, Barbara Kitzler, Bo Elberling
Summary: Future Arctic tundra productivity and vegetation composition will be influenced by nitrogen availability. Winter nitrogen mineralization has limited impact on plant growth and carbon sequestration, while summer near-surface warming promotes plant biomass and nitrogen uptake.
Article
Environmental Sciences
Laura H. Rasmussen, Wenxin Zhang, Per Ambus, Anders Michelsen, Per-Erik Jansson, Barbara Kitzler, Bo Elberling
Summary: Understanding N budgets of tundra ecosystems is crucial for projecting future changes in plant community composition, greenhouse gas balances and soil N stocks. Winter warming can lead to higher tundra winter nitrogen (N) mineralization rates, while summer warming may increase both growing season N mineralization and plant N demand. The study found that different plant species utilize nitrogen input differently depending on the season, highlighting the importance of considering lateral nitrogen inputs in future projections of tundra ecosystem responses.
Article
Biodiversity Conservation
Peiyan Wang, Jinsong Wang, Bo Elberling, Lu Yang, Weinan Chen, Lei Song, Yingjie Yan, Song Wang, Junxiao Pan, Yunlong He, Shuli Niu
Summary: Pronounced nongrowing season warming and changes in soil freeze-thaw cycles can significantly impact methane uptake in alpine ecosystems. The study found that warming increased the mean methane uptake rate during the cold season, with different effects under low-level and high-level warming. Moisture content and temperature were identified as key factors controlling methane uptake during different periods of the freeze-thaw cycle. Soil pH, available phosphorus, and methanotroph abundance were also found to play important roles in regulating annual methane uptake under warming conditions.
GLOBAL CHANGE BIOLOGY
(2022)
Article
Environmental Sciences
Wenyi Xu, Bo Elberling, Per Lennart Ambus
Summary: Fire in combination with summer warming can increase microbial P pools, enhance soil N retention, and potentially increase N uptake by recovering plants. Additionally, fire may alter N uptake differently among dominant shrub species in the tundra ecosystem, potentially changing plant species composition in the longer term.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Hans Frederik Engvej Hansen, Bo Elberling
Summary: The study found that Arctic permafrost contains bioavailable inorganic nitrogen, with significantly higher concentrations of NH4+ in the upper permafrost compared to the root zone. The release of inorganic nitrogen from permafrost thawing was calculated to be on the same order of magnitude as biological nitrogen fixation in relatively dry tundra ecosystems and less significant in wet ecosystems.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Environmental Sciences
M. M. T. Lakshani, T. K. K. Chamindu Deepagoda, Shoichiro Hamamoto, Bo Elberling, Wei Fu, Ting Yang, Jun Fan, Xiaoyi Ma, Timothy Clough, Kathleen M. M. Smits, T. G. Parameswaran, G. L. Sivakumar Babu, H. Chanakya
Summary: The relation between soil gas diffusivity and soil moisture is crucial for understanding and quantifying essential functions of terrestrial ecosystems. This study developed a novel gas diffusivity model based on soil air saturation, which showed better performance than classical predictive models. The model can differentiate moisture effects in different soil structural states.
VADOSE ZONE JOURNAL
(2023)
Article
Biology
Kevin K. Newsham, Birgitte Kortegaard Danielsen, Elisabeth Machteld Biersma, Bo Elberling, Guy Hillyard, Priyanka Kumari, Anders Prieme, Cheolwoon Woo, Naomichi Yamamoto
Summary: The effects of warming and increased water availability on soil microbes in the High Arctic are not well understood. An experiment conducted on Svalbard revealed that a rise in summertime soil temperature and irrigation led to increased greenhouse gas emissions and bacterial abundance.
Article
Soil Science
Wenyi Xu, Laura Lonstrup Frendrup, Anders Michelsen, Bo Elberling, Per Lennart Ambus
Summary: The impacts of increased winter snowfall and warmer summer air temperatures on nitrous oxide (N2O) dynamics in arctic tundra are uncertain. The study evaluated surface N2O dynamics in wet and dry tundra in West Greenland, and found that summer warming and deepened snow significantly increased N2O emissions in dry tundra, but not in wet tundra. The findings suggest that projected increases in winter precipitation and summer air temperatures may increase N2O emissions, particularly in the dry tundra dominant region.
SOIL BIOLOGY & BIOCHEMISTRY
(2023)
Article
Engineering, Environmental
Sebastian F. Zastruzny, Thomas Ingeman-Nielsen, Wenxin Zhang, Bo Elberling
Summary: Erosion and infrastructure in the Arctic can alter the thickness of the active layer by changing the thermal-hydrological regime and drainage patterns. Field experiments and simulations show that adding or removing soil can affect the thickness of the saturated zone in the active layer, leading to changes in permafrost thawing and water movement. These findings have important implications for the Arctic ecosystem and local communities' living conditions.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Soil Science
Yijing Liu, Birger U. Hansen, Bo Elberling, Andreas Westergaard-Nielsen
Summary: This study analyzes the snow dynamics in an Arctic ecosystem manipulation experiment on Disko Island, West Greenland, over 8 years. The results show that snow depth is the decisive factor affecting the difference between soil and air temperature, and there is a lagged effect of snow on soil temperature.
Article
Ecology
Matej Znaminko, Lukas Falteisek, Kristyna Vrbicka, Petra Klimova, Jesper R. Christiansen, Christian J. Jorgensen, Marek Stibal
Summary: Subglacial environments provide conditions suitable for microbial methane production, and high methane emissions have been discovered at a glacier in Greenland. The microbial assemblage exported in meltwater from the methane release hotspot is mainly composed of methylotrophs, and their relative abundance increases as the melt season progresses.
Article
Soil Science
Hanbo Yun, Qing Zhu, Jing Tang, Wenxin Zhang, Deliang Chen, Philippe Ciais, Qingbai Wu, Bo Elberling
Summary: This study quantified the effects of warming and permafrost thawing on nitrogen availability and plant growth in permafrost-affected ecosystems. The results showed that most sites on the Tibetan Plateau have experienced warming and thawing, leading to increased inorganic nitrogen availability. Deep-rooted plant species were able to utilize the added nitrogen, and a feedback mechanism of climate warming was identified, where released nitrogen favored deep-rooted plants. These findings explain the important changes in plant composition and growth observed across the study sites.
SOIL BIOLOGY & BIOCHEMISTRY
(2023)
Article
Environmental Sciences
M. M. Tharindi Lakshani, T. K. K. Chamindu Deepagoda, Yuan Li, H. F. E. Hansen, Bo Elberling, Sarath P. Nissanka, Dassanayake M. J. B. Senanayake, Shoichiro Hamamoto, G. L. Sivakumar Babu, Hoysala N. Chanakya, T. G. Parameswaran, Pandit G. Arunkumar, Bjoern Ole Sander, Timothy J. Clough, Kathleen Smits
Summary: The study suggests that alternative wetting and draining (AWD) is a promising method to reduce methane emissions, conserve water resources, and maintain crop productivity in paddy systems.
Article
Geosciences, Multidisciplinary
Peter Stimmler, Mathias Goeckede, Bo Elberling, Susan Natali, Peter Kuhry, Nia Perron, Fabrice Lacroix, Gustaf Hugelius, Oliver Sonnentag, Jens Strauss, Christina Minions, Michael Sommer, Joerg Schaller
Summary: Arctic soils store significant amounts of organic carbon and various elements, including amorphous silicon, calcium, iron, aluminum, and phosphorous. The Arctic is expected to experience the most prominent effects of global warming, resulting in the thawing of permafrost and altering the availability of soil elements. This study analyzed the content of amorphous silicon (ASi) in Arctic soils, as well as the availability of silicon, calcium, iron, phosphorous, and aluminum using Mehlich III extractions. The findings revealed substantial differences in ASi fraction and element availability among different lithologies and Arctic regions, which were summarized in pan-Arctic maps.
EARTH SYSTEM SCIENCE DATA
(2023)
Article
Soil Science
C. Beraud, F. Piola, J. Gervaix, G. Meiffren, C. Creuze des Chatelliers, A. Delort, C. Boisselet, S. Poussineau, E. Lacroix, A. A. M. Cantarel
Summary: This study investigated the soil factors influencing the development of biological denitrification inhibition (BDI) and found that initial soil moisture, ammonium concentration, and the initial abundance of certain microbial genes play significant roles in BDI development. Additionally, the research highlighted the relevance of biotic factors in explaining BDI and proposed the use of procyanidin concentration from plant belowground system as a new proxy for measuring BDI intensity.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Yizhu Qiao, Tingting Wang, Qiwei Huang, Hanyue Guo, He Zhang, Qicheng Xu, Qirong Shen, Ning Ling
Summary: Soil microbial community coalescence, the mixing and interaction of microbial communities, has been found to enhance the stability and complexity of rhizobacterial networks, leading to improved plant health and biomass. This study investigated the effects of different degrees of bacterial community coalescence on plant disease resistance by mixing soils from healthy and diseased habitats for watermelon planting. The results showed that mixing in more healthy soil reduced the plant disease index and increased biomass by improving the stability and complexity of the rhizobacterial network. Core taxa Nitrospirillum and Singulisphaera were enriched in the rhizosphere from healthy soils and played important roles in disease suppression and regulating the positive cohesion and modularity of the networks. Overall, these findings provide insights into the potential mechanism of microbial community coalescence for improving plant microbial community function and suggest new tools for enhancing plant fitness via soil microbiota mixing.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Mengqiu He, Shending Chen, Lei Meng, Xiaoqian Dan, Wenjie Wang, Qinying Zhu, Zucong Cai, Jinbo Zhang, Pierfrancesco Nardi, Christoph Mueller
Summary: Maize genotypes directly affect gene expression and nitrogen uptake capacity. The feedback between maize genotypes and soil nitrogen transformations, as well as their regulations on nitrogen uptake capacity, have been studied. The findings suggest that maize genotypes play a central role in regulating these feedbacks, which are important for maize breeding and enhancing maize production.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Ke Shi, Jiahui Liao, Xiaoming Zou, Han Y. H. Chen, Manuel Delgado-Baquerizo, Zhengming Yan, Tingting Ren, Honghua Ruan
Summary: Through rewilding, microbial extracellular and cellular residues can continuously accumulate in soils and significantly contribute to soil organic carbon sequestration. Extracellular residues are mainly driven by fine root biomass, while cellular residues are mainly driven by soil nitrogen and organic carbon content.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Sensen Chen, Ying Teng, Yongming Luo, Eiko Kuramae, Wenjie Ren
Summary: This study comprehensively assesses the effects of NMs on the soil microbiome through a global meta-analysis. The results reveal significant negative impacts of NMs on soil microbial diversity, biomass, activity, and function. Metal NMs, especially Ag NMs, have the most pronounced negative effects on various soil microbial community metrics.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Shareen K. D. Sanders, Gerard Martinez-De Leon, Ludovico Formenti, Madhav P. Thakur
Summary: Collembolans, the diverse group of soil invertebrates, are affected by anthropogenic climate warming, which alters their diversity and density. In addition to abiotic stressors, changes in food availability, specifically the abundance of saprotrophic and mycorrhizal fungi, influence Collembola responses to climate warming. Collembolans prefer saprotrophic fungi but rely on mycorrhizal fungi when food sources are scarce. Understanding the mechanisms behind these dietary shifts in warm-dry and warm-wet soil conditions is crucial for predicting the impact of climate change on Collembola-fungal interactions.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Wimonsiri Pingthaisong, Sergey Blagodatsky, Patma Vityakon, Georg Cadisch
Summary: A study found that mixing high-C/N ratio rice straw with low-C/N ratio groundnut stover can improve the chemical composition of the input, stimulate microbial growth, decrease the loss of residue-derived carbon in the soil, and reduce native soil carbon and nitrogen consumption.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
Article
Soil Science
Jiachen Wang, Jie Zhao, Rong Yang, Xin Liu, Xuyuan Zhang, Wei Zhang, Xiaoyong Chen, Wende Yan, Kelin Wang
Summary: Nitrogen is vital for ecosystem productivity, restoration, and succession processes. This study found that legume intercropping was more effective than chemical nitrogen fertilizers in promoting the complexity and stability of the soil micro-food web, as it increased microbial and nematode communities and enhanced energy flow patterns.
SOIL BIOLOGY & BIOCHEMISTRY
(2024)
