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Belykh E, Maystrenko T, Velegzhaninov I, Tavleeva M, Rasova E, Rybak A. Taxonomic Diversity and Functional Traits of Soil Bacterial Communities under Radioactive Contamination: A Review. Microorganisms 2024; 12:733. [PMID: 38674676 PMCID: PMC11051952 DOI: 10.3390/microorganisms12040733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 03/28/2024] [Accepted: 04/01/2024] [Indexed: 04/28/2024] Open
Abstract
Studies investigating the taxonomic diversity and structure of soil bacteria in areas with enhanced radioactive backgrounds have been ongoing for three decades. An analysis of data published from 1996 to 2024 reveals changes in the taxonomic structure of radioactively contaminated soils compared to the reference, showing that these changes are not exclusively dependent on contamination rates or pollutant compositions. High levels of radioactive exposure from external irradiation and a high radionuclide content lead to a decrease in the alpha diversity of soil bacterial communities, both in laboratory settings and environmental conditions. The effects of low or moderate exposure are not consistently pronounced or unidirectional. Functional differences among taxonomic groups that dominate in contaminated soil indicate a variety of adaptation strategies. Bacteria identified as multiple-stress tolerant; exhibiting tolerance to metals and antibiotics; producing antioxidant enzymes, low-molecular antioxidants, and radioprotectors; participating in redox reactions; and possessing thermophilic characteristics play a significant role. Changes in the taxonomic and functional structure, resulting from increased soil radionuclide content, are influenced by the combined effects of ionizing radiation, the chemical toxicity of radionuclides and co-contaminants, as well as the physical and chemical properties of the soil and the initial bacterial community composition. Currently, the quantification of the differential contributions of these factors based on the existing published studies presents a challenge.
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Affiliation(s)
- Elena Belykh
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28 Kommunisticheskaya St., Syktyvkar 167982, Russia (I.V.); (E.R.)
| | - Tatiana Maystrenko
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28 Kommunisticheskaya St., Syktyvkar 167982, Russia (I.V.); (E.R.)
| | - Ilya Velegzhaninov
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28 Kommunisticheskaya St., Syktyvkar 167982, Russia (I.V.); (E.R.)
| | - Marina Tavleeva
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28 Kommunisticheskaya St., Syktyvkar 167982, Russia (I.V.); (E.R.)
- Department of Biology, Institute of Natural Sciences, Pitirim Sorokin Syktyvkar State University, 55 Oktyabrsky Prospekt, Syktyvkar 167001, Russia
| | - Elena Rasova
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28 Kommunisticheskaya St., Syktyvkar 167982, Russia (I.V.); (E.R.)
| | - Anna Rybak
- Institute of Biology of Komi Scientific Centre, Ural Branch of Russian Academy of Sciences, 28 Kommunisticheskaya St., Syktyvkar 167982, Russia (I.V.); (E.R.)
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Mallet C, Rossi F, Hassan-Loni Y, Holub G, Thi-Hong-Hanh L, Diez O, Michel H, Sergeant C, Kolovi S, Chardon P, Montavon G. Assessing the chronic effect of the bioavailable fractions of radionuclides and heavy metals on stream microbial communities: A case study at the Rophin mining site. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 919:170692. [PMID: 38325491 DOI: 10.1016/j.scitotenv.2024.170692] [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: 10/18/2023] [Revised: 01/08/2024] [Accepted: 02/02/2024] [Indexed: 02/09/2024]
Abstract
This study aimed to assess the potential impact of long-term chronic exposure (69 years) to naturally-occurring radionuclides (RNs) and heavy metals on microbial communities in sediment from a stream flowing through a watershed impacted by an ancient mining site (Rophin, France). Four sediment samples were collected along a radioactivity gradient (for 238U368 to 1710 Bq.Kg-1) characterized for the presence of the bioavailable fractions of radionuclides (226Ra, 210Po), and trace metal elements (Th, U, As, Pb, Cu, Zn, Fe). Results revealed that the available fraction of contaminants was significant although it varied considerably from one element to another (0 % for As and Th, 5-59 % for U). Nonetheless, microbial communities appeared significantly affected by such chronic exposure to (radio)toxicities. Several microbial functions carried by bacteria and related with carbon and nitrogen cycling have been impaired. The high values of fungal diversity and richness observed with increasing downstream contamination (H' = 4.4 and Chao1 = 863) suggest that the community had likely shifted toward a more adapted/tolerant one as evidenced, for example, by the presence of the species Thelephora sp. and Tomentella sp. The bacterial composition was also affected by the contaminants with enrichment in Myxococcales, Acidovorax or Nostocales at the most contaminated points. Changes in microbial composition and functional structure were directly related to radionuclide and heavy metal contaminations, but also to organic matter which also significantly affected, directly or indirectly, bacterial and fungal compositions. Although it was not possible to distinguish the specific effects of RNs from heavy metals on microbial communities, it is essential to continue studies considering the available fraction of elements, which is the only one able to interact with microorganisms.
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Affiliation(s)
- Clarisse Mallet
- Université Clermont-Auvergne, CNRS, Laboratoire Microorganismes: Génome et Environnement, F-63170 Aubière, France; LTSER "Zone Atelier Territoires Uranifères", F-63170, France.
| | - Florent Rossi
- Département de biochimie, de microbiologie et de bio-informatique, Faculté des sciences et de génie, Université Laval, Québec, Canada; Centre de recherche de l'institut de cardiologie et de pneumologie de Québec, Québec, Canada
| | - Yahaya Hassan-Loni
- SUBATECH, IMT Atlantique, Nantes Université, CNRS, F-44000 Nantes, France
| | - Guillaume Holub
- Univ. Bordeaux, CNRS, LP2I Bordeaux, UMR5797, F- 33170 Gradignan, France; LTSER "Zone Atelier Territoires Uranifères", F-63170, France
| | - Le Thi-Hong-Hanh
- ICN UMR 7272, Université Côte d'Azur, 28 avenue Valrose, 06108 Nice, France; LTSER "Zone Atelier Territoires Uranifères", F-63170, France
| | - Olivier Diez
- Institut de Radioprotection et Sureté Nucléaire (IRSN), PSE-ENV/SPDR/LT2S, 31 Avenue de la division Leclerc, F-922602 Fontenay-aux-Roses, France; LTSER "Zone Atelier Territoires Uranifères", F-63170, France
| | - Hervé Michel
- ICN UMR 7272, Université Côte d'Azur, 28 avenue Valrose, 06108 Nice, France; LTSER "Zone Atelier Territoires Uranifères", F-63170, France
| | - Claire Sergeant
- Univ. Bordeaux, CNRS, LP2I Bordeaux, UMR5797, F- 33170 Gradignan, France; LTSER "Zone Atelier Territoires Uranifères", F-63170, France
| | - Sofia Kolovi
- Université Clermont-Auvergne, CNRS, LPC Clermont, F-63170 Aubière, France; LTSER "Zone Atelier Territoires Uranifères", F-63170, France
| | - Patrick Chardon
- Université Clermont-Auvergne, CNRS, LPC Clermont, F-63170 Aubière, France; LTSER "Zone Atelier Territoires Uranifères", F-63170, France
| | - Gilles Montavon
- SUBATECH, IMT Atlantique, Nantes Université, CNRS, F-44000 Nantes, France; LTSER "Zone Atelier Territoires Uranifères", F-63170, France.
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Gao W, Liu P, Ye Z, Zhou J, Wang X, Huang X, Deng X, Ma L. Divergent prokaryotic microbial assembly, co-existence patterns and functions in surrounding river sediments of a Cu-polymetallic deposit in Tibet. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 851:158192. [PMID: 35988602 DOI: 10.1016/j.scitotenv.2022.158192] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 08/16/2022] [Accepted: 08/17/2022] [Indexed: 06/15/2023]
Abstract
The exploitation of polymetallic deposits produces large amounts of mine drainage, which poses great challenges to the surrounding aquatic ecosystem. However, the prokaryotic microbial community assembly and co-existence patterns in the polluted area are poorly understood, especially in high-altitude localities. Herein, we investigated the prokaryotic microbial assembly, co-existence patterns and their potential functional responses in surrounding river sediments of a Cu-polymetallic deposit in Tibet. The sediments from mine drainage and surrounding tributaries exhibited distinct geochemical gradients, especially the changes in Cu content. The microbial community structure changed significantly, accompanied by decreased richness and diversity with increased Cu content. Interestingly, the relative abundances of some potential functional bacteria (e.g., Planctomycetota) actually increased as the Cu levels raised. In low contaminated area, ecological drift was the most important assembly process, whereas deterministic processes gained importance with pollution levels. Meanwhile, negative interactions in co-occurrence networks were more frequent with higher modularity and reduced keystone taxa in high contaminated area. Notably, the functions related to ABC transporters and quorum sensing (QS) were more abundant with high Cu content, which helped bacteria work together to cope with the stressful environment. Taken together, the physicochemical gradients dominated by Cu content drove the distribution, assembly and co-existence patterns of microbial communities in surrounding river sediments of a Cu-polymetallic deposit. These findings provide new insights into the maintenance mechanisms of prokaryotic microbial communities in response to heavy metal stress at high altitudes.
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Affiliation(s)
- Weikang Gao
- Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Peng Liu
- Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Zhihang Ye
- Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Jianwei Zhou
- Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Xingjie Wang
- Institute of Geological Survey, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Xinping Huang
- Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Xiaoyu Deng
- Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China
| | - Liyuan Ma
- Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, Hubei, China.
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Rogiers T, Van Houdt R, Williamson A, Leys N, Boon N, Mijnendonckx K. Molecular Mechanisms Underlying Bacterial Uranium Resistance. Front Microbiol 2022; 13:822197. [PMID: 35359714 PMCID: PMC8963506 DOI: 10.3389/fmicb.2022.822197] [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: 11/25/2021] [Accepted: 01/27/2022] [Indexed: 11/16/2022] Open
Abstract
Environmental uranium pollution due to industries producing naturally occurring radioactive material or nuclear accidents and releases is a global concern. Uranium is hazardous for ecosystems as well as for humans when accumulated through the food chain, through contaminated groundwater and potable water sources, or through inhalation. In particular, uranium pollution pressures microbial communities, which are essential for healthy ecosystems. In turn, microorganisms can influence the mobility and toxicity of uranium through processes like biosorption, bioreduction, biomineralization, and bioaccumulation. These processes were characterized by studying the interaction of different bacteria with uranium. However, most studies unraveling the underlying molecular mechanisms originate from the last decade. Molecular mechanisms help to understand how bacteria interact with radionuclides in the environment. Furthermore, knowledge on these underlying mechanisms could be exploited to improve bioremediation technologies. Here, we review the current knowledge on bacterial uranium resistance and how this could be used for bioremediation applications.
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Affiliation(s)
- Tom Rogiers
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium
- Center for Microbial Ecology and Technology, Ghent University, Ghent, Belgium
| | - Rob Van Houdt
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium
| | - Adam Williamson
- Centre Etudes Nucléaires de Bordeaux Gradignan (CENBG), Bordeaux, France
| | - Natalie Leys
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium
| | - Nico Boon
- Center for Microbial Ecology and Technology, Ghent University, Ghent, Belgium
| | - Kristel Mijnendonckx
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium
- *Correspondence: Kristel Mijnendonckx,
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Zhu F, Zhao B, Min W, Li J. Characteristics of groundwater microbial communities and the correlation with the environmental factors in a decommissioned acid in-situ uranium mine. Front Microbiol 2022; 13:1078393. [PMID: 36909843 PMCID: PMC9992980 DOI: 10.3389/fmicb.2022.1078393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 12/29/2022] [Indexed: 02/24/2023] Open
Abstract
Microorganisms play an important role in the bioremediation process for the decommissioned acid in-situ leaching uranium mine. It is crucial to understand the original microbial community characteristics before the in-situ bioremediation. However, there are limited studies on the groundwater microbial characteristics in the decommissioned acid in-situ uranium mine. To this end, we collected groundwater samples, including the groundwater that originally residual in the borehole (RW) and the aquifer water (AW), from a decommissioned acid in-situ uranium mine in the southern margin of Ili Basin in Xinjiang, China. The occurrence characteristics of the groundwater microbial communities and their correlation with environmental factors were systematically studied based on the high throughput 16S rRNA gene sequencing data and geochemical data. Results found that the AW samples had higher alpha- and beta- diversity than the RW samples. The relative abundance of Sporosarcina, Sulfobacillus, Pedobacter and Pseudomonas were significantly different in the AW and RW samples, which had significant correlation with pH, metals, and sulfate, etc. A series of reducing microorganisms were discovered, such as sulfate reduction (e.g., Desulfosporosinus) and metal reduction (e.g., Arthrobacter, Bacillus, Clostridium, Pseudomonas, and Rhodanobacter), which have the potential to attenuate sulfate and uranium in groundwater. In addition, we found that pH and redox potential (Eh) were the dominant environmental factors affecting the microbial composition. This study extends our knowledge of microbial community structure changes in the decommissioned acid in-situ uranium mine and has positive implications for assessing the potential of natural attenuation and bioremediation strategies.
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Affiliation(s)
- Fangfang Zhu
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, Jiangxi, China.,School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang, Jiangxi, China
| | - Bei Zhao
- School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, China
| | - Wenwen Min
- School of Information Science and Engineering, Yunnan University, Kunming, Yunnan, China
| | - Jiang Li
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, Jiangxi, China.,School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang, Jiangxi, China
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Chatzipanagiotou KR, Jourdin L, Bitter H, Strik D. Concentration-dependent effects of nickel doping on activated carbon biocathodes. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02151f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In microbial electrosynthesis (MES), microorganisms grow on a cathode electrode as biofilm, or in the catholyte as planktonic biomass, and utilize CO2 for their growth and metabolism. Modification of the...
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Lu Z, Su H. Employing gene chip technology for monitoring and assessing soil heavy metal pollution. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 194:2. [PMID: 34862584 DOI: 10.1007/s10661-021-09650-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Accepted: 11/21/2021] [Indexed: 06/13/2023]
Abstract
Soil heavy metals pollution can cause many serious environment problems because of involving a very complex pollution process for soil health. Therefore, it is very important to explore methods that can effectively evaluate heavy metal pollution. Researchers were actively looking for new ideas and new methods for evaluating and predicting levels of soil heavy metal pollution. The study on microbial communities is one of the effective methods using gene chip technology. Gene chip technology, as a high-throughput metagenomics analysis technique, has been widely used for studying the structure and function of complex microbial communities in different polluted environments from different pollutants, including the soil polluted by heavy metals. However, there is still a lack of a systematic summarization for the polluted soil by heavy metals. This paper systematically analyzed soil heavy metals pollution via reviewing previous studies on applying gene chip technology, including single species, tolerance mechanisms, enrichment mechanisms, anticipation and evaluation of soil remediation, and multi-directional analysis. The latest gene chip technologies and corresponding application cases for discovering critical species and functional genes via analyzing microbial communities and evaluating heavy metal pollution of soil were also introduced in this paper. This article can provide scientific guidance for researchers actively investigating the soil polluted by heavy metals.
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Affiliation(s)
- ZiChun Lu
- College of Hehai, Chongqing University of Technology, Chongqing, 400717, China
| | - HaiFeng Su
- Key Laboratory of Degraded and Unused Land Consolidation Engineering, the Ministry of Natural and Resources, Xi'an, Shanxi, 710075, China.
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Science, Chongqing, 400714, China.
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Rogiers T, Claesen J, Van Gompel A, Vanhoudt N, Mysara M, Williamson A, Leys N, Van Houdt R, Boon N, Mijnendonckx K. Soil microbial community structure and functionality changes in response to long-term metal and radionuclide pollution. Environ Microbiol 2021; 23:1670-1683. [PMID: 33415825 PMCID: PMC8048617 DOI: 10.1111/1462-2920.15394] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 12/09/2020] [Accepted: 01/04/2021] [Indexed: 12/20/2022]
Abstract
Microbial communities are essential for a healthy soil ecosystem. Metals and radionuclides can exert a persistent pressure on the soil microbial community. However, little is known on the effect of long‐term co‐contamination of metals and radionuclides on the microbial community structure and functionality. We investigated the impact of historical discharges of the phosphate and nuclear industry on the microbial community in the Grote Nete river basin in Belgium. Eight locations were sampled along a transect to the river edge and one location further in the field. Chemical analysis demonstrated a metal and radionuclide contamination gradient and revealed a distinct clustering of the locations based on all metadata. Moreover, a relation between the chemical parameters and the bacterial community structure was demonstrated. Although no difference in biomass was observed between locations, cultivation‐dependent experiments showed that communities from contaminated locations survived better on singular metals than communities from control locations. Furthermore, nitrification, a key soil ecosystem process seemed affected in contaminated locations when combining metadata with microbial profiling. These results indicate that long‐term metal and radionuclide pollution impacts the microbial community structure and functionality and provides important fundamental insights into microbial community dynamics in co‐metal‐radionuclide contaminated sites.
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Affiliation(s)
- Tom Rogiers
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium.,Center for Microbial Ecology and Technology (CMET), UGent, Ghent, Belgium
| | - Jürgen Claesen
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium
| | - Axel Van Gompel
- Biosphere Impact Studies, Interdisciplinary Biosciences, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium
| | - Nathalie Vanhoudt
- Biosphere Impact Studies, Interdisciplinary Biosciences, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium
| | - Mohamed Mysara
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium
| | - Adam Williamson
- Center for Microbial Ecology and Technology (CMET), UGent, Ghent, Belgium
| | - Natalie Leys
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium
| | - Rob Van Houdt
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium
| | - Nico Boon
- Center for Microbial Ecology and Technology (CMET), UGent, Ghent, Belgium
| | - Kristel Mijnendonckx
- Microbiology Unit, Interdisciplinary Biosciences, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium
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An F, Li H, Diao Z, Lv J. The soil bacterial community in cropland is vulnerable to Cd contamination in winter rather than in summer. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:114-125. [PMID: 30382516 DOI: 10.1007/s11356-018-3531-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Accepted: 07/03/2018] [Indexed: 06/08/2023]
Abstract
Potentially toxic metal contamination exerts a significant impact on soil microbes, thus deteriorating soil quality. The seasonality also has effects in shaping soil microbial community. The soil microbial community is a crucial factor representing soil health. However, whether the influence of potentially toxic metals on the microbial community differs in different seasons are still unknown. In this study, we established nine mesocosms of three cadmium treatments to investigate the impact of Cd amendments on the bacterial community of croplands in winter and summer. High bacterial diversity was revealed from the soil samples with 31 phyla. In winter, the abundance of dominant phylum Bacteroidetes, Gemmatimonadetes, and Verrucomicrobia increased, but Firmicutes decreased in Cd-contaminated soil in winter. Meanwhile, the abundance of Actinobacteria, Planctomycetes, and Chloroflexi showed Cd dose-dependent pattern in winter. In summer, the phylum Gemmatimonadetes and Verrucomicrobia decreased along with Cd dosing, while the dose-effect of Cd was found on the abundance of Actinobacteria and Chloroflexi. At the genus level, 55 genera of bacteria were significantly affected by Cd stress in winter, 24 genera decreased, 11 genera increased along with Cd gradients, and 20 genera changed depending on Cd dosage. In particular, genera Lactococcus, Psychrobacter, Brochothrix, Enhydrobacter, and Carnobacterium disappeared in Cd treatments, suggesting high sensitivity to Cd stress in winter. In summer, one genus decreased, seven genera increased with Cd dosing, and three genera were dose-dependent. The contrasting effects of Cd on soil bacterial community could be due to different edaphic factors in winter (moisture, available phosphorus, and total Cd) and summer (available Cd). Collectively, the winter-induced multiple stressors increase the impact of Cd on bacterial community in cropland. In further studies, the seasonal factor should be taken into consideration during the sampling stage.
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Affiliation(s)
- Fengqiu An
- College of Natural Resources and Environment, Ministry of Agriculture Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Northwest A&F University, Yangling, 712100, China
- College of Environmental and Chemical Engineering, Polytechnic University, Xi'an, 710048, China
| | - Haihong Li
- College of Environmental and Chemical Engineering, Polytechnic University, Xi'an, 710048, China
| | - Zhan Diao
- College of Natural Resources and Environment, Ministry of Agriculture Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Northwest A&F University, Yangling, 712100, China
- Law School & Intellectual Property School, JiNan University, Guangzhou, 510632, China
| | - Jialong Lv
- College of Natural Resources and Environment, Ministry of Agriculture Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, Northwest A&F University, Yangling, 712100, China.
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Zhang F, Zhao X, Li Q, Liu J, Ding J, Wu H, Zhao Z, Ba Y, Cheng X, Cui L, Li H, Zhu J. Bacterial community structure and abundances of antibiotic resistance genes in heavy metals contaminated agricultural soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:9547-9555. [PMID: 29357075 DOI: 10.1007/s11356-018-1251-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 01/09/2018] [Indexed: 06/07/2023]
Abstract
Soil contamination with heavy metals is a worldwide problem especially in China. The interrelation of soil bacterial community structure, antibiotic resistance genes, and heavy metal contamination in soil is still unclear. Here, seven agricultural areas (G1-G7) with heavy metal contamination were sampled with different distances (741 to 2556 m) to the factory. Denaturing gradient gel electrophoresis (DGGE) and Shannon index were used to analyze bacterial community diversity. Real-time fluorescence quantitative PCR was used to detect the relative abundance of ARGs sul1, sul2, tetA, tetM, tetW, one mobile genetic elements (MGE) inti1. Results showed that all samples were polluted by Cadmium (Cd), and some of them were polluted by lead (Pb), mercury (Hg), arsenic (As), copper (Cu), and zinc (Zn). DGGE showed that the most abundant bacterial species were found in G7 with the lightest heavy metal contamination. The results of the principal component analysis and clustering analysis both showed that G7 could not be classified with other samples. The relative abundance of sul1 was correlated with Cu, Zn concentration. Gene sul2 are positively related with total phosphorus, and tetM was associated with organic matter. Total gene abundances and relative abundance of inti1 both correlated with organic matter. Redundancy analysis showed that Zn and sul2 were significantly related with bacterial community structure. Together, our results indicate a complex linkage between soil heavy metal concentration, bacterial community composition, and some global disseminated ARG abundance.
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Affiliation(s)
- Fengli Zhang
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Xiaoxue Zhao
- Jiyuan City Key Laboratory of Heavy-Metal Monitoring and Pollution Control, Jiyuan, 459000, China
| | - Qingbo Li
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Jia Liu
- Department of Leukemia, Henan Cancer Hospital, Zhengzhou, 450003, China
| | - Jizhe Ding
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Huiying Wu
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Zongsheng Zhao
- Jiyuan City Key Laboratory of Heavy-Metal Monitoring and Pollution Control, Jiyuan, 459000, China
| | - Yue Ba
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Xuemin Cheng
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Liuxin Cui
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Hongping Li
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Jingyuan Zhu
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China.
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Wang N, Zhang S, He M. Bacterial community profile of contaminated soils in a typical antimony mining site. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:141-152. [PMID: 28039624 DOI: 10.1007/s11356-016-8159-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Accepted: 11/28/2016] [Indexed: 06/06/2023]
Abstract
The soils around the world's largest antimony mine have been contaminated by high concentrations of Sb and As, which might influence microbial diversity in the surrounding soils. The ecological effects of bioavailable Sb and As on the composition and diversity of microbial community in soils remain unknown. In this study, the relative abundance, taxonomic diversity and composition of bacterial community in soils from a typical Sb mine area, and the relationship between the bacterial community and bioavailable concentrations as well as environmental factors have been investigated comprehensively using high-throughput sequencing (HTS) and diffusive gradients in thin films (DGT). The results indicated that Proteobacteria, Acidobacteria, Chloroflexi, Bacteroidetes, Actinobacteria, Gemmatimonadetes, and Cyanobacteria were the dominant bacterial populations at phylum level in all soil samples, accounting for more than 80% of the bacteria sequenced. The abundance and diversity of bacterial community vary along a metal contamination gradient. Redundancy discriminate analysis (RDA) revealed that 74.74% of bacterial community variation in the contaminated soils was explained by six environmental factors (pH, SbDGT, AsDGT, potential ecological risk index (RI), TC, TN), among which pH, SbDGT, and AsDGT were dominant factors influencing the composition and diversity of bacteria. This study contributes to our understanding of microbial diversity in a local ecosystem and introduces the option of studying bioavailable Sb and As using DGT.
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Affiliation(s)
- Ningning Wang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, People's Republic of China
| | - Suhuan Zhang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, People's Republic of China
| | - Mengchang He
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, People's Republic of China.
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Cao J, Hafermann L, Köhler JM. Stochastically reduced communities-Microfluidic compartments as model and investigation tool for soil microorganism growth in structured spaces. Eng Life Sci 2017; 17:792-800. [PMID: 32624825 DOI: 10.1002/elsc.201600264] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 02/03/2017] [Accepted: 02/20/2017] [Indexed: 11/09/2022] Open
Abstract
Microbial community in soil is a complex and dynamic system. Using traditional culture experiments it is difficult to model the stochastic distribution of single organisms of microbial communities in the soil pore's structure. Droplet-based micro-segmented flow technique allows the transfer of the principle of stochastic confinement of stochastically reduced communities from soil micro pores into nanoliter droplets. Microfluidics was applied for the investigation and comparison of soil samples from ancient mining areas by highly resolved concentration-dependent screenings. As results, the generation, incubation, and in situ optical characterization of nanoliter droplets of suspensions of unknown soil microbial communities allowed the identification of different response characteristics toward heavy metal exposition. The investigations proved the high potential of microfluidics for investigations of soil microbial communities. It may be in the future helpful to detect bacteria and consortia with special biosorption characteristics, which could be useful for the development of biological accumulation and detoxification strategies.
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Affiliation(s)
- Jialan Cao
- Physical Chemistry and Microreaction Technology, Institute for Micro- und Nanotechnologies / Institute for Chemistry and Biotechnique Ilmenau University of Technology Ilmenau Germany
| | - Lars Hafermann
- Physical Chemistry and Microreaction Technology, Institute for Micro- und Nanotechnologies / Institute for Chemistry and Biotechnique Ilmenau University of Technology Ilmenau Germany
| | - J Michael Köhler
- Physical Chemistry and Microreaction Technology, Institute for Micro- und Nanotechnologies / Institute for Chemistry and Biotechnique Ilmenau University of Technology Ilmenau Germany
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