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Zorz J, Paquette AJ, Gillis T, Kouris A, Khot V, Demirkaya C, De La Hoz Siegler H, Strous M, Vadlamani A. Coordinated proteome change precedes cell lysis and death in a mat-forming cyanobacterium. THE ISME JOURNAL 2023; 17:2403-2414. [PMID: 37914776 PMCID: PMC10689466 DOI: 10.1038/s41396-023-01545-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 10/12/2023] [Accepted: 10/16/2023] [Indexed: 11/03/2023]
Abstract
Cyanobacteria form dense multicellular communities that experience transient conditions in terms of access to light and oxygen. These systems are productive but also undergo substantial biomass turnover through cell death, supplementing heightened heterotrophic respiration. Here we use metagenomics and metaproteomics to survey the molecular response of a mat-forming cyanobacterium undergoing mass cell lysis after exposure to dark and anoxic conditions. A lack of evidence for viral, bacterial, or eukaryotic antagonism contradicts commonly held beliefs on the causative agent for cyanobacterial death during dense growth. Instead, proteogenomics data indicated that lysis likely resulted from a genetically programmed response triggered by a failure to maintain osmotic pressure in the wake of severe energy limitation. Cyanobacterial DNA was rapidly degraded, yet cyanobacterial proteins remained abundant. A subset of proteins, including enzymes involved in amino acid metabolism, peptidases, toxin-antitoxin systems, and a potentially self-targeting CRISPR-Cas system, were upregulated upon lysis, indicating possible involvement in the programmed cell death response. We propose this natural form of cell death could provide new pathways for controlling harmful algal blooms and for sustainable bioproduct production.
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Affiliation(s)
- Jackie Zorz
- Department of Earth, Energy, and Environment, University of Calgary, Calgary, AB, Canada.
| | - Alexandre J Paquette
- Department of Earth, Energy, and Environment, University of Calgary, Calgary, AB, Canada
| | - Timber Gillis
- Department of Earth, Energy, and Environment, University of Calgary, Calgary, AB, Canada
| | - Angela Kouris
- Department of Earth, Energy, and Environment, University of Calgary, Calgary, AB, Canada
- Synergia Biotech Inc., Calgary, AB, Canada
| | - Varada Khot
- Department of Earth, Energy, and Environment, University of Calgary, Calgary, AB, Canada
| | - Cigdem Demirkaya
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, Canada
| | | | - Marc Strous
- Department of Earth, Energy, and Environment, University of Calgary, Calgary, AB, Canada
| | - Agasteswar Vadlamani
- Department of Earth, Energy, and Environment, University of Calgary, Calgary, AB, Canada
- Synergia Biotech Inc., Calgary, AB, Canada
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Ritschel T, Totsche KU. Reductive transformation of birnessite by low-molecular-weight organic acids. CHEMOSPHERE 2023; 325:138414. [PMID: 36925012 DOI: 10.1016/j.chemosphere.2023.138414] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 02/23/2023] [Accepted: 03/13/2023] [Indexed: 06/18/2023]
Abstract
Soil biogeochemistry is intrinsically coupled to the redox cycling of iron and manganese. Oxidized manganese forms various (hydr)oxides that may reductively transform and dissolve, thereby serving as electron acceptors for microbial metabolisms. Furthermore, manganese oxides might reduce purely abiotically by oxidation of dissolved Mn2+ in a specific route of transformation from birnessite (MnIVO2) into metastable feitknechtite (β-MnIIIOOH) and stable manganite (γ-MnIIIOOH). In natural soil solutions, however, dissolved Mn2+ is not abundant and organic substances such as low-molecular-weight organic acids (LMWOA) may be oxidized and serve as an electron donor for manganese oxide reduction instead. We investigated whether LMWOA would impact the transformation of birnessite at a temperature of 290 ± 2 K under ambient pressure for up to 1200 d. We found that birnessite was reductively transformed into feitknechtite, which subsequently alters into the more stable manganite without releasing Mn2+ into the solution. Instead, LMWOA served as electron donors and were oxidized from lactate into pyruvate, acetate, oxalate, and finally, inorganic carbon. We conclude that the reductive transformation of short-range ordered minerals like birnessite by the abiotic oxidation of LMWOA is a critical process controlling the abundance of LMWOA in natural systems besides their microbial consumption. Our results further suggest that the reduction of MnIV oxides not necessarily results in their dissolution at neutral and alkaline pH but also forms more stable MnIII oxyhydroxides with less oxidative degradation potential for organic contaminants.
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Affiliation(s)
- Thomas Ritschel
- Department of Hydrogeology, Institute for Geosciences, Friedrich Schiller University Jena, Burgweg 11, 07749, Jena, Germany
| | - Kai Uwe Totsche
- Department of Hydrogeology, Institute for Geosciences, Friedrich Schiller University Jena, Burgweg 11, 07749, Jena, Germany.
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Niu Y, Qu M, Du J, Wang X, Yuan S, Zhang L, Zhao J, Jin B, Wu H, Wu S, Cao X, Pang L. Effects of multiple key factors on the performance of petroleum coke-based constructed wetland-microbial fuel cell. CHEMOSPHERE 2023; 315:137780. [PMID: 36623598 DOI: 10.1016/j.chemosphere.2023.137780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/03/2023] [Accepted: 01/05/2023] [Indexed: 06/17/2023]
Abstract
In this study, two constructed wetland-microbial fuel cells (CW-MFC), including a closed-circuit system (CCW-MFC) and an open-circuit system (OCW-MFC) with petroleum coke as electrode and substrate, were constructed to explore the effect of multiple key factors on their operation performances. Compared to a traditional CW, the CCW-MFC system showed better performance, achieving an average removal efficiency of COD, NH4+-N, and TN of 94.49 ± 1.81%, 94.99 ± 4.81%, and 84.67 ± 5.6%, respectively, when the aeration rate, COD concentration, and hydraulic retention time were 0.4 L/min, 300 mg/L, and 3 days. The maximum output voltage (425.2 mV) of the CCW-MFC system was achieved when the aeration rate was 0.2 L/min. In addition, the CCW-MFC system showed a greater denitrification ability due to the higher abundance of Thiothrix that might attract other denitrifying bacteria, such as Methylotenera and Hyphomicrobium, to participate in the denitrifying process, indicating the quorum sensing could be stimulated within the denitrifying microbial community.
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Affiliation(s)
- Yulong Niu
- School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Mingxiang Qu
- School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Jingjing Du
- School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China; Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Henan, China.
| | - Xilin Wang
- School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Shuaikang Yuan
- School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Lingyan Zhang
- School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China
| | - Jianguo Zhao
- School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China; Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Henan, China
| | - Baodan Jin
- School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China; Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Henan, China
| | - Haiming Wu
- School of Environmental Science & Engineering, Shandong University, Qingdao, China
| | - Shubiao Wu
- Department of Agroecology, Aarhus University, Tjele, Denmark
| | - Xia Cao
- School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China; Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Henan, China.
| | - Long Pang
- School of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China; Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Henan, China
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Sarkodie EK, Jiang L, Li K, Yang J, Guo Z, Shi J, Deng Y, Liu H, Jiang H, Liang Y, Yin H, Liu X. A review on the bioleaching of toxic metal(loid)s from contaminated soil: Insight into the mechanism of action and the role of influencing factors. Front Microbiol 2022; 13:1049277. [PMID: 36569074 PMCID: PMC9767989 DOI: 10.3389/fmicb.2022.1049277] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 11/18/2022] [Indexed: 12/12/2022] Open
Abstract
The anthropogenic activities in agriculture, industrialization, mining, and metallurgy combined with the natural weathering of rocks, have led to severe contamination of soils by toxic metal(loid)s. In an attempt to remediate these polluted sites, a plethora of conventional approaches such as Solidification/Stabilization (S/S), soil washing, electrokinetic remediation, and chemical oxidation/reduction have been used for the immobilization and removal of toxic metal(loid)s in the soil. However, these conventional methods are associated with certain limitations. These limitations include high operational costs, high energy demands, post-waste disposal difficulties, and secondary pollution. Bioleaching has proven to be a promising alternative to these conventional approaches in removing toxic metal(loid)s from contaminated soil as it is cost-effective, environmentally friendly, and esthetically pleasing. The bioleaching process is influenced by factors including pH, temperature, oxygen, and carbon dioxide supply, as well as nutrients in the medium. It is crucial to monitor these parameters before and throughout the reaction since a change in any, for instance, pH during the reaction, can alter the microbial activity and, therefore, the rate of metal leaching. However, research on these influencing factors and recent innovations has brought significant progress in bioleaching over the years. This critical review, therefore, presents the current approaches to bioleaching and the mechanisms involved in removing toxic metal(loid)s from contaminated soil. We further examined and discussed the fundamental principles of various influencing factors that necessitate optimization in the bioleaching process. Additionally, the future perspectives on adding omics for bioleaching as an emerging technology are discussed.
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Affiliation(s)
- Emmanuel Konadu Sarkodie
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, China
| | - Luhua Jiang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, China
| | - Kewei Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, China
| | - Jiejie Yang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, China
| | - Ziwen Guo
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, China
| | - Jiaxin Shi
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, China
| | - Yan Deng
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, China
| | - Hongwei Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, China
| | - Huidan Jiang
- Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha, China
| | - Yili Liang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, China
| | - Huaqun Yin
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, China
| | - Xueduan Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, China
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Super-hydration and reduction of manganese oxide minerals at shallow terrestrial depths. Nat Commun 2022; 13:1942. [PMID: 35410458 PMCID: PMC9001738 DOI: 10.1038/s41467-022-29328-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 02/21/2022] [Indexed: 11/21/2022] Open
Abstract
Manganese oxides are ubiquitous marine minerals which are redox sensitive. As major components of manganese nodules found on the ocean floor, birnessite and buserite have been known to be two distinct water-containing minerals with manganese octahedral interlayer separations of ~7 Å and ~10 Å, respectively. We show here that buserite is a super-hydrated birnessite formed near 5 km depth conditions. As one of the most hydrous minerals containing ca. 34.5 wt. % water, super-hydrated birnessite, i.e., buserite, remains stable up to ca. 70 km depth conditions, where it transforms into manganite by releasing ca. 24.3 wt. % water. Subsequent transformations to hausmannite and pyrochroite occur near 100 km and 120 km depths, respectively, concomitant with a progressive reduction of Mn4+ to Mn2+. Our work forwards an abiotic geochemical cycle of manganese minerals in subduction and/or other aqueous terrestrial environments, with implications for water storage and cycling, and the redox capacity of the region. The enigmatic relationship of birnessite and buserite, the two most representative phases in submarine nodules, has been established to reveal that buserite is a super-hydrated form of birnessite, forming at shallow terrestrial depth in the presence of water
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Xu D, Li B, Dou X, Feng L, Zhang L, Liu Y. Enhanced performance and mechanisms of sulfamethoxazole removal in vertical subsurface flow constructed wetland by filling manganese ore as the substrate. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 812:152554. [PMID: 34952087 DOI: 10.1016/j.scitotenv.2021.152554] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 12/13/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
Sulfamethoxazole (SMX), a typical sulfonamide antibiotic, is ubiquitous in secondary effluent and may pose undesirable effects on the aquatic ecosystem and human health. Constructed wetland (CW) is more and more applied in advanced sewage treatment, and the substrate plays an important role in removing pollutants. Manganese (Mn) ore has been widely concerned as a new type of substrate to remove pollutants in CW due to its high adsorption and redox properties. However, the removal mechanism of antibiotics by Mn ore CW is still unclear. In this study, Mn ore was selected as the substrate of a vertical flow constructed wetland (VFCW) while gravel substrate was selected as a control group, and the removal efficiencies of SMX in two VFCWs were investigated and compared. Experimental devices were layered as different regions, including anaerobic (0-32 cm), anoxic (32-64 cm) and aerobic (64-80 cm) zones, to examine the removal characteristics of SMX in different regions. And the removal mechanism of SMX was also explored by examining the adsorption and oxidation of Mn ore and the microbial degradation performance. The results showed that the final removal efficiency of SMX in CW filled with Mn ore substrate (M-CW) (48.4%) increased by 39.6%, compared with CW filled with gravel substrate (G-CW) (8.8%). According to the calculation of mass balance, the total loss of SMX caused by the oxidation of Mn ore and biodegradation accounted for 33.0% of the total SMX input in M-CW, the SMX loss caused by the biodegradation in G-CW accounted for 13.0%, and the substrate adsorption in M-CW and G-CW occupied 15.0% and 7.0% of the total SMX input, respectively. Mn(II) was formed during the oxidation of SMX by Mn(III, IV) and dissimilated Mn(III, IV) reduction by microorganisms in anaerobic environment (0-32 cm). Whereafter, the produced Mn(II) entered into the aerobic zone (64-80 cm) with the water flow and was re-oxidized into biogenic Mn oxides (BioMnOx) which had high adsorption and oxidation performance for SMX. Therefore, Mn ore could enhance SMX removal efficiency in anaerobic and aerobic zones by Mn redox process.
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Affiliation(s)
- Dandan Xu
- Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, Beijing Forestry University, Beijing 100083, China
| | - Benhang Li
- Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, Beijing Forestry University, Beijing 100083, China
| | - Xudan Dou
- Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, Beijing Forestry University, Beijing 100083, China
| | - Li Feng
- Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, Beijing Forestry University, Beijing 100083, China
| | - Liqiu Zhang
- Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, Beijing Forestry University, Beijing 100083, China.
| | - Yongze Liu
- Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, Beijing Forestry University, Beijing 100083, China.
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Mansor M, Xu J. Benefits at the nanoscale: a review of nanoparticle-enabled processes favouring microbial growth and functionality. Environ Microbiol 2020; 22:3633-3649. [PMID: 32705763 DOI: 10.1111/1462-2920.15174] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/17/2020] [Accepted: 07/21/2020] [Indexed: 11/29/2022]
Abstract
Nanoparticles are ubiquitous and co-occur with microbial life in every environment on Earth. Interactions between microbes and nanoparticles impact the biogeochemical cycles via accelerating various reaction rates and enabling biological processes at the smallest scales. Distinct from microbe-mineral interactions at large, microbe-nanoparticle interactions may involve higher levels of active recognition and utilization of the reactive, changeable, and thereby 'moldable' nano-sized inorganic phases by microbes, which has been given minimal attention in previous reviews. Here we have compiled the various cases of microbe-nanoparticle interactions with clear and potential benefits to the microbial cells and communities. Specifically, we discussed (i) the high bioavailabilities of nanoparticles due to increased specific surface areas and size-dependent solubility, with a focus on environmentally-relevant iron(III) (oxyhydr)oxides and pyrite, (ii) microbial utilization of nanoparticles as 'nano-tools' for electron transfer, chemotaxis, and storage units, and (iii) speculated benefits of precipitating 'moldable' nanoparticles in extracellular biomineralization. We further discussed emergent questions concerning cellular level responses to nanoparticle-associated cues, and the factors that affect nanoparticles' bioavailabilities beyond size-dependent effects. We end the review by proposing a framework towards more quantitative approaches and by highlighting promising techniques to guide future research in this exciting field.
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Affiliation(s)
- Muammar Mansor
- Geomicrobiology, Center for Applied Geoscience, University of Tuebingen, Tuebingen, 72076, Germany
| | - Jie Xu
- Department of Geological Sciences, the University of Texas at El Paso, El Paso, Texas, 79968, USA
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Macaulay BM, Boothman C, van Dongen BE, Lloyd JR. A Novel "Microbial Bait" Technique for Capturing Fe(III)-Reducing Bacteria. Front Microbiol 2020; 11:330. [PMID: 32218773 PMCID: PMC7078115 DOI: 10.3389/fmicb.2020.00330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 02/14/2020] [Indexed: 11/29/2022] Open
Abstract
Microbial reduction of Fe(III) is a key geochemical process in anoxic environments, controlling the degradation of organics and the mobility of metals and radionuclides. To further understand these processes, it is vital to develop a reliable means of capturing Fe(III)-reducing microorganisms from the field for analysis and lab-based investigations. In this study, a novel method of capturing Fe(III)-reducing bacteria using Fe(III)-coated pumice "microbe-baits" was demonstrated. The methodology involved the coating of pumice (approximately diameter 4 to 6 mm) with a bioavailable Fe(III) mineral (akaganeite), and was verified by deployment into a freshwater spring for 2 months. On retrieval, the coated pumice baits were incubated in a series of lab-based microcosms, amended with and without electron donors (lactate and acetate), and incubated at 20°C for 8 weeks. 16S rRNA gene sequencing using the Illumina MiSeq platform showed that the Fe(III)-coated pumice baits, when incubated in the presence of lactate and acetate, enriched for Deltaproteobacteria (relative abundance of 52% of the sequences detected corresponded to Geobacter species and 24% to Desulfovibrio species). In the absence of added electron donors, Betaproteobacteria were the most abundant class detected, most heavily represented by a close relative to Rhodoferax ferrireducens (15% of species detected), that most likely used organic matter sequestered from the spring waters to support Fe(III) reduction. In addition, TEM-EDS analysis of the Fe(III)-coated pumice slurries amended with electron donors revealed that a biogenic Fe(II) mineral, magnetite, was formed at the end of the incubation period. These results demonstrate that Fe(III)-coated pumice "microbe baits" can potentially help target metal-reducing bacteria for culture-dependent studies, to further our understanding of the nano-scale microbe-mineral interactions in aquifers.
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Affiliation(s)
- Babajide Milton Macaulay
- Department of Earth and Environmental Sciences, The University of Manchester, Manchester, United Kingdom
- Williamson Research Centre for Molecular Environmental Science, The University of Manchester, Manchester, United Kingdom
- Environmental Biology and Public Health Unit, Department of Biology, The Federal University of Technology, Akure, Nigeria
| | - Christopher Boothman
- Department of Earth and Environmental Sciences, The University of Manchester, Manchester, United Kingdom
- Williamson Research Centre for Molecular Environmental Science, The University of Manchester, Manchester, United Kingdom
| | - Bart E. van Dongen
- Department of Earth and Environmental Sciences, The University of Manchester, Manchester, United Kingdom
- Williamson Research Centre for Molecular Environmental Science, The University of Manchester, Manchester, United Kingdom
| | - Jonathan Richard Lloyd
- Department of Earth and Environmental Sciences, The University of Manchester, Manchester, United Kingdom
- Williamson Research Centre for Molecular Environmental Science, The University of Manchester, Manchester, United Kingdom
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