Article
Engineering, Environmental
Yi-Ju Wu, Yi-Wen Liu, Hai-Hsuan Cheng, Chih-Wen Ke, Tsair-Fuh Lin, Liang-Ming Whang
Summary: The study demonstrated that the BioNET system can effectively remove ammonia from slightly polluted river water at low hydraulic retention times. Aeration significantly affects the nitrification process of BioNET, leading to a significant increase in specific ammonia oxidization rate. Real-time quantitative PCR analysis revealed that AOB and Nitrospira are dominant in the bioreactor.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Agricultural Engineering
Yaoqi Hou, Mengqi He, Yongjie Liu, Qian Wang, Aopan Yang, Fei Yang, Zhongfang Lei, Xuesong Yi, Weiwei Huang
Summary: This study investigated the nitrogen removal mechanisms during swine manure anaerobic digestion and the effects of biogas circulation and activated carbon addition. The methane yield was increased by 25.9%, 22.3%, and 44.1% with biogas circulation, activated carbon addition, and their combination, respectively. Nitrification-denitrification was found to be the dominant ammonia removal pathway in all digesters, while anammox did not occur. Biogas circulation promoted mass transfer and enriched nitrification and denitrification bacteria and functional genes, while activated carbon facilitated ammonia removal as an electron shuttle. The combined strategies significantly reduced total ammonia nitrogen by 23.6%.
BIORESOURCE TECHNOLOGY
(2023)
Article
Soil Science
Pengpeng Duan, Xinyi Yang, Xunyang He, Yonglei Jiang, Kongcao Xiao, Kelin Wang, Dejun Li
Summary: This study investigated the pathways of N2O production in soils collected from different topographic positions in a subtropical forest. The results showed that autotrophic nitrification pathways were the major source of N2O production, while denitrification pathways were minor sources. Chronic N addition stimulated ammonia oxidation-derived N2O in both the valley and slope, but had different effects on other pathways. Overall, this study provides insights into the regulation of N2O production and its pathways in a subtropical forest.
BIOLOGY AND FERTILITY OF SOILS
(2022)
Article
Agronomy
Yang Yue, Xiangwei Gong, Yongzhao Zheng, Ping Tian, Ying Jiang, Hongyu Zhang, Hua Qi
Summary: Using organic fertilizer combined with maize straw can effectively improve soil quality and enhance the abundance of nitrifying and denitrifying microorganisms in the soil. The application of the organic fertilizer and straw returning practice is essential for optimizing the nutrient balance of farmland ecosystems in Northeast China.
Article
Biodiversity Conservation
Manman Chen, Hong Pan, Mingjie Sun, Wei He, Meng Wei, Yanhong Lou, Hui Wang, Quangang Yang, Haojie Feng, Yuping Zhuge
Summary: Organic fertilizer application increased N2O emissions from nitrification, dominated by the Nitrosospira cluster 3 lineage of AOB, while chemical N fertilizer stimulated N2O production from denitrification, dominated by the nirK lineage of Rhizobiales. The study highlights the different effects of organic and chemical fertilizers on N2O microbial emission pathways in agricultural soils.
ECOLOGICAL INDICATORS
(2021)
Article
Agronomy
Wei Zhang, Yan Ma, Xuan Yang, Xiuchun Xu, Bang Ni, Rui Liu, Fanqiao Meng
Summary: This study investigates the effects of the nitrogen stabilizers DMPP and NBPT on soil microbial communities. The results show that long-term application of DMPP and NBPT can reduce nitrous oxide emissions, and DMPP can decrease the diversity of ammonia oxidizers. Long-term urea application increases the potential nitrification rate of ammonia oxidizers, while DMPP weakens this effect.
Article
Agricultural Engineering
Xianhe Cao, Binhan Zhao, Yongming Wu, Jun Huang, Hongzhi Wang, Xianyun Sun, Shaojie Li
Summary: A novel strain AS1 of Alcaligenes aquatilis with heterotrophic nitrifying-aerobic denitrifying capacity was isolated. AS1 exhibited efficient ammonia removal under various environmental conditions and showed potential in treating actual piggery wastewater.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Qian Zhang, Yunan Zhu, Chunbo Yuan, Chu Zhang, Minglei Cui, Tiantao Zhao
Summary: A highly salt and high ammonia nitrogen tolerant heterotrophic nitrifying bacterium, Alcaligenes faecalis TF-1, was isolated from landfill leachate. The study investigated its nitrogen removal pathway and optimized nitrogen removal conditions.
BIORESOURCE TECHNOLOGY
(2022)
Article
Soil Science
Christina Hazard, James Prosser, Graeme W. Nicol
Summary: Potential rate assays are used to determine functional process rates in environmental samples, but are often misused to estimate activity based on assumed maximum rates under optimal conditions. Despite recognizing the physiological diversity within communities, potential rate assays may overlook suboptimal or inactive community members. Hence, caution is needed when using potential rate assays to determine ecological relevance.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Article
Plant Sciences
Zhen Zhang, Zhenwen Yu, Yongli Zhang, Yu Shi
Summary: This study demonstrates that split nitrogen fertilizer application (SNFA) under water-saving irrigation can significantly reduce nitrogen loss and improve nitrogen uptake by wheat, leading to increased yield and cleaner production practices in the North China Plain.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Oceanography
Guizhen Li, Qiliang Lai, Guangshan Wei, Peisheng Yan, Zongze Shao
Summary: The heterotrophic bacterium Halomonas venusta MA-ZP17-13 can simultaneously undertake nitrification and denitrification, achieving a maximum ammonium-nitrogen removal rate of 98.7% under optimal conditions. This bacterium has the potential for nitrogen removal in marine aquaculture systems.
ACTA OCEANOLOGICA SINICA
(2021)
Article
Engineering, Environmental
Yuanyuan Miao, Liang Zhang, Deshuang Yu, Jianhua Zhang, Wenke Zhang, Guocheng Ma, Xinchao Zhao, Yongzhen Peng
Summary: Intermittent aeration is an effective strategy for biological wastewater treatment, allowing for advanced nitrogen removal and reduced energy consumption. It is suitable for partial nitrification and denitrification processes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Soil Science
Nadine Loick, Elizabeth Dixon, G. Peter Matthews, Christoph Mueller, Veronica S. Ciganda, Maria Lopez-Aizpun, Miguel A. Repullo, Laura M. Cardenas
Summary: This study quantifies the production and consumption pathways of N2O in soil using labelled substrate-N, showing the impact of different water filled pore space on N-transformation processes and emissions. The research highlights the importance of heterotrophic nitrification and denitrification in the N2O emissions, demonstrating the complex relationship between water filled pore space and nitrogen transformations.
Article
Engineering, Chemical
Guillian Morgan, Rania Ahmed Hamza
Summary: In this study, AGS-SBRs were used to cultivate nitrifying and nitrifying-denitrifying granules and investigate the treatment of sidestreams generated in a WWTP. The results showed that AGS technology is a viable process for efficient nutrient removal.
Article
Environmental Sciences
Kuno Kasak, Mikk Espenberg, Tyler L. Anthony, Susannah G. Tringe, Alex C. Valach, Kyle S. Hemes, Whendee L. Silver, Ulo Mander, Keit Kill, Gavin McNicol, Daphne Szutu, Joseph Verfaillie, Dennis D. Baldocchi
Summary: The concentration of nitrous oxide (N2O) is rapidly increasing in the atmosphere, mainly originating from microbial nitrogen cycling in terrestrial ecosystems. Research shows that the abundances of nirS and nirK genes are highest in intensively managed agricultural fields, indicating high N2O production potential, while nitrogen transforming genes are more abundant in agricultural sites compared to wetland sites. Wetlands may act as a sink of N2O, suggesting that wetland restoration could be a promising natural climate solution.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Review
Plant Sciences
Nelly S. Raymond, Beatriz Gomez-Munoz, Frederik J. T. van der Bom, Ole Nybroe, Lars S. Jensen, Dorette S. Mueller-Stover, Astrid Oberson, Alan E. Richardson
Summary: Studies have shown that while phosphate-solubilising microorganisms have positive effects on plant growth under controlled conditions, field experiments do not always demonstrate the same positive responses. The mechanisms observed in vitro do not necessarily translate into improved crop phosphorus nutrition in complex soil-plant systems. Therefore, the current concept of PSM function may not provide a reliable strategy for increasing crop phosphorus nutrition.
Article
Biochemistry & Molecular Biology
Laurence J. Clarke, Leonie Suter, Rob King, Andrew Bissett, Sophie Bestley, Bruce E. Deagle
Summary: The study found that the bacterial epibiont communities associated with Antarctic krill exhibit spatial structuring, mainly driven by distance rather than environmental factors, especially for strongly krill-associated bacteria. The turnover of bacterial communities is influenced by bacterial dispersal limitation, which increases with geographic distance. Additionally, physical isolation can cause krill-associated bacterial communities to diverge, as shown by divergent epibiont communities generated from a single krill swarm split between aquarium tanks under near-identical conditions.
Article
Engineering, Environmental
Christian Stamm, Claudia R. Binder, Emmanuel Frossard, Philip M. Haygarth, Astrid Oberson, Alan E. Richardson, Christian Schaum, Oscar Schoumans, Kai M. Udert
Summary: This paper summarizes the outcomes of the 9th International Phosphorus Workshop on moving towards sustainable phosphorus management, highlighting progress in recognizing phosphorus as a finite mineable resource, technologies for phosphorus recycling, and legislative efforts towards a circular phosphorus economy. However, critical deficits exist, such as dealing with legacy phosphorus, understanding the impact of climate change on ecosystem phosphorus cycling, and developing business models to scale up existing recycling practices.
Article
Microbiology
Swan L. S. Sow, Mark Brown, Laurence J. Clarke, Andrew Bissett, Jodie van de Kamp, Thomas W. Trull, Eric J. Raes, Justin R. Seymour, Anna R. Bramucci, Martin Ostrowski, Philip W. Boyd, Bruce E. Deagle, Paula C. Pardo, Bernadette M. Sloyan, Levente Bodrossy
Summary: We investigated the regional variability of prokaryote assemblages in the Southern Ocean and suggested that it should be taken into account in the ecosystem microbial models.
ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Environmental Sciences
Katie E. Hillyer, Eric Raes, Kristen Karsh, Bronwyn Holmes, Andrew Bissett, David J. Beale
Summary: Estuaries are heavily impacted by human activities, particularly metal contaminants. A study on the metabolic effects of metal contaminants on benthic fauna found distinct metabolic signatures in different invertebrate taxa, correlating with environmental drivers. The approach combining metabolomics and traditional monitoring proved effective in detecting chronic metal exposure effects.
ENVIRONMENTAL POLLUTION
(2022)
Article
Fisheries
Eric J. Raes, Bronwyn H. Holmes, Kristen Karsh, Katie E. Hillyer, Mark Green, Jodie van de Kamp, Levente Bodrossy, Sam Whitehead, Bernadette Proemse, Ursula Taylor, Akira Weller-Wong, Andrew T. Revill, Elizabeth A. Brewer, Andrew Bissett
Summary: Omics-based monitoring using bacterial marker genes can provide valuable mechanistic insights into the functioning of ecosystems. This study found that sediment-specific variables have a larger influence over sediment bacterial communities than large-scale environmental conditions.
MARINE AND FRESHWATER RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Elle J. Bowd, Sam C. Banks, Andrew Bissett, Tom W. May, David B. Lindenmayer
Summary: Microorganisms play critical roles in terrestrial ecosystems, but disturbances can alter the composition and diversity of soil microbial communities in Mountain Ash forests.
Article
Environmental Sciences
Rohan M. Shah, Sarah Stephenson, Joseph Crosswell, Daniel Gorman, Katie E. Hillyer, Enzo A. Palombo, Oliver A. H. Jones, Stephen Cook, Levente Bodrossy, Jodie van de Kamp, Thomas K. Walsh, Andrew Bissett, Andrew D. L. Steven, David J. Beale
Summary: Vertical zonation within estuarine ecosystems has a strong impact on microbial diversity and function, while the horizontal patterns of microbial communities across an estuary have received less attention. This study investigates the environmental gradients created by the transition between dominant vegetation types in a tropical river system. The results reveal the habitat-specificity of microbial communities and metabolic pathways, as well as the high degree of metabolic redundancy in bacterial communities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Microbiology
Nine Le Reun, Anna Bramucci, James O'Brien, Martin Ostrowski, Mark V. Brown, Jodie Van de Kamp, Levente Bodrossy, Jean-Baptiste Raina, Penelope Ajani, Justin Seymour
Summary: This study investigates the spatial and temporal dynamics of diatom communities in Australian coastal waters. The results reveal significant biogeographical differences in diatom community composition, with each site having distinct community structures. Temperature and nutrients are identified as the key environmental factors influencing diatom community differences, and specific groups of bacteria also play a role in shaping the spatial dynamics of diatom communities. In addition, the study uncovers some co-occurrences between diatoms and bacteria.
Article
Soil Science
Michela Battisti, Richard J. Simpson, Adam Stefanski, Alan E. Richardson, Rebecca E. Haling
Summary: Recovering phosphorus from waste streams is an important way to conserve scarce resources. This study evaluated the fertilizer and soil pH amendment values of sewage sludge ash for pasture growth on acidic soils. The study found that the residual value of the ash was better than that of single superphosphate in soils with strong phosphorus sorption capacities.
NUTRIENT CYCLING IN AGROECOSYSTEMS
(2022)
Article
Agronomy
Alan E. Richardson, Timothy S. George, Maarten Hens, Emmanuel Delhaize, Peter R. Ryan, Richard J. Simpson, Peter J. Hocking
Summary: Organic anions can mobilize soil organic phosphorus, increasing its bioavailability. This has important implications for understanding phosphorus dynamics in natural and managed ecosystems, as well as improving phosphorus acquisition efficiency in agricultural plants.
Article
Microbiology
Michael P. Doane, Martin Ostrowski, Mark Brown, Anna Bramucci, Levente Bodrossy, Jodie van de Kamp, Andrew Bissett, Peter Steinberg, Martina A. Doblin, Justin Seymour
Summary: This study investigates the drivers of bacterioplankton assembly and finds that both environmental factors and biotic interactions are important in shaping bacterioplankton diversity. The importance of these factors varies depending on the environmental heterogeneity of the location, with environmental factors playing a larger role in more variable environments and biotic interactions being more important in stable environments.
ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Agronomy
Cathryn A. O'Sullivan, Elliott G. Duncan, Margaret M. Roper, Alan E. Richardson, John A. Kirkegaard, Mark B. Peoples
Summary: This study found that canola has biological nitrification inhibition (BNI) capacity, which can inhibit the growth of ammonia-oxidizing bacteria and reduce the nitrification rates in soil. The BNI capacity of canola may have important implications for nitrogen cycling in farming systems and the nitrogen uptake efficiency of crops in rotational farming systems.
FRONTIERS OF AGRICULTURAL SCIENCE AND ENGINEERING
(2022)
Article
Soil Science
Clive A. Kirkby, John A. Kirkegaard, Alan E. Richardson
Summary: The study found that gravel-associated carbon and nitrogen account for a significant portion of soil carbon and nitrogen stocks, especially at depths below 100 cm. Disregarding the gravel fraction may lead to underestimation of total soil carbon and nitrogen, impacting carbon accounting in agricultural soils and strategies for soil carbon sequestration.
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)