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Wang Q, Zheng G, Ni L, Wang H, Li W, Guo P, Wang Y, Zheng D, Wu J, Zhang D. Colonization characteristics and dynamic transition of archaea communities on polyethylene and polypropylene microplastics in the sediments of mangrove ecosystems. JOURNAL OF HAZARDOUS MATERIALS 2024; 471:134343. [PMID: 38640671 DOI: 10.1016/j.jhazmat.2024.134343] [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: 12/03/2023] [Revised: 02/28/2024] [Accepted: 04/16/2024] [Indexed: 04/21/2024]
Abstract
Microplastics are a growing concern in mangrove ecosystems; however, their effects on archaeal communities and related ecological processes remain unclear. We conducted in situ biofilm-enrichment experiments to investigate the ecological influence of polyethylene (PE) and polypropylene microplastics on archaeal communities in the sediments of mangrove ecosystems. The archaeal community present on microplastics was distinct from that of the surrounding sediments at an early stage but became increasingly similar over time. Bathyarchaeota, Thaumarchaeota, Euryarchaeota, and Asgardaeota were the most abundant phyla. Methanolobus, an archaeal biomarker, was enriched in PE biofilms, and significantly controlled by homogeneous selection in the plastisphere, indicating an increased potential risk of methane emission. The dominant archaeal assembly process in the sediments was deterministic (58.85%-70.47%), while that of the PE biofilm changed from stochastic to deterministic during the experiment. The network of PE plastispheres showed less complexity and competitive links, and higher modularity and stability than that of sediments. Functional prediction showed an increase in aerobic ammonia oxidation during the experiment, whereas methanogenesis and chemoheterotrophy were significantly higher in the plastisphere. This study provides novel insights into the impact of microplastic pollution on archaeal communities and their mediating ecological functions in mangrove ecosystems.
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Affiliation(s)
- Qiong Wang
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China; Donghai Laboratory, Zhoushan 316021, Zhejiang, China; Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei, China
| | - Gang Zheng
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China; Xianghu Laboratory, Hangzhou 311231, Zhejiang, China
| | - Lingfang Ni
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China
| | - Heng Wang
- Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, Zhoushan 316021, Zhejiang, China
| | - Weiye Li
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China
| | - Peng Guo
- Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei, China
| | - Yi Wang
- Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei, China
| | - Daoqiong Zheng
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China; Donghai Laboratory, Zhoushan 316021, Zhejiang, China
| | - Jiaping Wu
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China
| | - Dongdong Zhang
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China; Donghai Laboratory, Zhoushan 316021, Zhejiang, China; Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, Zhoushan 316021, Zhejiang, China.
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Choi JS, Yoon H, Heo Y, Kim TH, Park JW. Comparison of gut toxicity and microbiome effects in zebrafish exposed to polypropylene microplastics: Interesting effects of UV-weathering on microbiome. JOURNAL OF HAZARDOUS MATERIALS 2024; 470:134209. [PMID: 38581880 DOI: 10.1016/j.jhazmat.2024.134209] [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: 02/05/2024] [Revised: 03/22/2024] [Accepted: 04/02/2024] [Indexed: 04/08/2024]
Abstract
Weathered microplastics (MPs) exhibit different physicochemical properties compared to pristine MPs, thus, their effects on the environment and living organisms may also differ. In the present study, we investigated the gut-toxic effects of virgin polypropylene MPs (PP) and UV-weathered PP MPs (UV-PP) on zebrafish. The zebrafish were exposed to the two types of PP MPs at a concentration of 50 mg/L each for 14 days. After exposure, MPs accumulated primarily within the gastrointestinal tract, with UV-PP exhibiting a higher accumulation than PP. The ingestion of PP and UV-PP induced gut damage in zebrafish and increased the gene expression and levels of enzymes related to oxidative stress and inflammation, with no significant differences between the two MPs. Analysis of the microbial community confirmed alterations in the abundance and diversity of zebrafish gut microorganisms in the PP and UV-PP groups, with more pronounced changes in the PP-exposed group. Moreover, the Kyoto Encyclopedia of Genes and Genomes pathway analysis confirmed the association between changes in the gut microorganisms at the phylum and genus levels with cellular responses, such as oxidative stress, inflammation, and tissue damage. This study provides valuable insights regarding the environmental impact of MPs on organisms.
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Affiliation(s)
- Jin Soo Choi
- Environmental Exposure & Toxicology Research Center, Korea Institute of Toxicology, 17 Jegok-gil, Jinju 52834, Republic of Korea
| | - Hakwon Yoon
- Department of Biological Enivronment, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Yunwi Heo
- Environmental Exposure & Toxicology Research Center, Korea Institute of Toxicology, 17 Jegok-gil, Jinju 52834, Republic of Korea
| | - Tae Hee Kim
- Advanced Textile R&D Department, Korea Institute of Industrial Technology, Ansan 426-171, Republic of Korea
| | - June-Woo Park
- Environmental Exposure & Toxicology Research Center, Korea Institute of Toxicology, 17 Jegok-gil, Jinju 52834, Republic of Korea; Human and Environmental Toxicology Program, Korea University of Science and Technology (UST), 217, Gajeong-ro, Daejeon 34113, Republic of Korea.
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3
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Sofield CE, Anderton RS, Gorecki AM. Mind over Microplastics: Exploring Microplastic-Induced Gut Disruption and Gut-Brain-Axis Consequences. Curr Issues Mol Biol 2024; 46:4186-4202. [PMID: 38785524 PMCID: PMC11120006 DOI: 10.3390/cimb46050256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 04/22/2024] [Accepted: 04/29/2024] [Indexed: 05/25/2024] Open
Abstract
As environmental plastic waste degrades, it creates an abundance of diverse microplastic particles. Consequently, microplastics contaminate drinking water and many staple food products, meaning the oral ingestion of microplastics is an important exposure route for the human population. Microplastics have long been considered inert, however their ability to promote microbial dysbiosis as well as gut inflammation and dysfunction suggests they are more noxious than first thought. More alarmingly, there is evidence for microplastics permeating from the gut throughout the body, with adverse effects on the immune and nervous systems. Coupled with the now-accepted role of the gut-brain axis in neurodegeneration, these findings support the hypothesis that this ubiquitous environmental pollutant is contributing to the rising incidence of neurodegenerative diseases, like Alzheimer's disease and Parkinson's disease. This comprehensive narrative review explores the consequences of oral microplastic exposure on the gut-brain-axis by considering current evidence for gastrointestinal uptake and disruption, immune activation, translocation throughout the body, and neurological effects. As microplastics are now a permanent feature of the global environment, understanding their effects on the gut, brain, and whole body will facilitate critical further research and inform policy changes aimed at reducing any adverse consequences.
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Affiliation(s)
- Charlotte E. Sofield
- School of Health Sciences, University of Notre Dame Australia, Fremantle, WA 6160, Australia; (C.E.S.); (R.S.A.)
| | - Ryan S. Anderton
- School of Health Sciences, University of Notre Dame Australia, Fremantle, WA 6160, Australia; (C.E.S.); (R.S.A.)
- Institute for Health Research, University of Notre Dame Australia, Fremantle, WA 6160, Australia
| | - Anastazja M. Gorecki
- School of Health Sciences, University of Notre Dame Australia, Fremantle, WA 6160, Australia; (C.E.S.); (R.S.A.)
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Song H, Xiao S, Zhou X, Li Y, Tao M, Wu F, Xu X. Temporal dynamics of bacterial colonization on five types of microplastics in a freshwater lake. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 913:169697. [PMID: 38163614 DOI: 10.1016/j.scitotenv.2023.169697] [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: 11/01/2023] [Revised: 12/22/2023] [Accepted: 12/24/2023] [Indexed: 01/03/2024]
Abstract
Microplastics (MPs), as a new substrate, provide a unique niche for microbial colonization in the freshwater ecosystems; however, the impacts of long-term MP exposure on colonized bacteria are still unclear. In this study, five MP types were exposed in a freshwater lake for approximately one year, and the MP particles, together with the surrounding water, were collected on days 60, 150, 250 and 330 during the in situ field experiment. Bacteria on the MP surface, as well as free-living bacteria in the surrounding water, were analyzed to evaluate the temporal dynamics of these bacterial communities. Results show that all five MP types exhibited signs of degradation during the exposure process. Additionally, the alpha diversity, community structure and composition of MP-attached bacteria significantly differed from that of the free-living bacteria in the surrounding water, indicating that the five MP types could provide a preferable niche for bacterial colonization in a freshwater environment. Proteobacteria, Chloroflexi, Verrucomicrobiota, Actinobacteriota and Firmicutes were the top five dominant phyla. Some plastic-degrading bacteria included in these phyla were detected, verifying that MP-attached biofilms had a certain degree of MP degradation potential. Some potentially pathogenic bacteria were also detected, suggesting an ecological threat for spreading disease in the aquatic ecosystem. Furthermore, the bacterial community and some metabolic pathways were significantly affected by the MP type (P < 0.01) and exposure time (P < 0.01), indicating that the presence of MPs not only alters the bacterial community structure and composition, but also influences their potential functional properties in freshwater ecosystems. Multiple factors, including the physicochemical properties related to MPs and the environmental parameters of the surrounding water, affect the community composition and the function of MP-attached bacteria to different degrees. Our findings indicate that the presence of MPs has a potential ecological impact on freshwater ecosystems.
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Affiliation(s)
- Haiya Song
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Sisi Xiao
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Xiaohong Zhou
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Yanan Li
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Miaomiao Tao
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Fan Wu
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Xiaohong Xu
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
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Zhang W, Liang S, Grossart HP, Christie-Oleza JA, Gadd GM, Yang Y. Convergence effect during spatiotemporal succession of lacustrine plastisphere: loss of priority effects and turnover of microbial species. ISME COMMUNICATIONS 2024; 4:ycae056. [PMID: 38711932 PMCID: PMC11073396 DOI: 10.1093/ismeco/ycae056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 04/01/2024] [Accepted: 04/16/2024] [Indexed: 05/08/2024]
Abstract
Succession is a fundamental aspect of ecological theory, but studies on temporal succession trajectories and ecological driving mechanisms of plastisphere microbial communities across diverse colonization environments remain scarce and poorly understood. To fill this knowledge gap, we assessed the primary colonizers, succession trajectories, assembly, and turnover mechanisms of plastisphere prokaryotes and eukaryotes from four freshwater lakes. Our results show that differences in microbial composition similarity, temporal turnover rate, and assembly processes in the plastisphere do not exclusively occur at the kingdom level (prokaryotes and eukaryotes), but also depend on environmental conditions and colonization time. Thereby, the time of plastisphere colonization has a stronger impact on community composition and assembly of prokaryotes than eukaryotes, whereas for environmental conditions, the opposite pattern holds true. Across all lakes, deterministic processes shaped the assembly of the prokaryotes, but stochastic processes influenced that of the eukaryotes. Yet, they share similar assembly processes throughout the temporal succession: species turnover over time causes the loss of any priority effect, which leads to a convergent succession of plastisphere microbial communities. The increase and loss of microbial diversity in different kingdoms during succession in the plastisphere potentially impact the stability of entire microbial communities and related biogeochemical cycles. Therefore, research needs to integrate temporal dynamics along with spatial turnovers of the plastisphere microbiome. Taking the heterogeneity of global lakes and the diversity of global climate patterns into account, we highlight the urgency to investigate the spatiotemporal succession mechanism of plastisphere prokaryotes and eukaryotes in more lakes around the world.
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Affiliation(s)
- Weihong Zhang
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Danjiangkou Wetland Ecosystem Field Scientific Observation and Research Station, Chinese Academy of Sciences & Hubei Province, Wuhan 430074, China
| | - Shuxin Liang
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- School of Ecology and Environment, Tibet University, Lhasa 850000, China
| | - Hans-Peter Grossart
- Leibniz-Institute for Freshwater Ecology and Inland Fisheries (IGB), Neuglobsow 16775, Germany
- Institute for Biochemistry and Biology, Potsdam University, Potsdam 14469, Germany
| | | | - Geoffrey Michael Gadd
- Geomicrobiology Group, School of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, United Kingdom
- State Key Laboratory of Heavy Oil Processing, State Key Laboratory of Petroleum Pollution Control, China University of Petroleum, Beijing 102249, China
| | - Yuyi Yang
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Danjiangkou Wetland Ecosystem Field Scientific Observation and Research Station, Chinese Academy of Sciences & Hubei Province, Wuhan 430074, China
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Zhang W, Bhagwat G, Palanisami T, Liang S, Wan W, Yang Y. Lacustrine plastisphere: Distinct succession and assembly processes of prokaryotic and eukaryotic communities and role of site, time, and polymer types. WATER RESEARCH 2024; 248:120875. [PMID: 37992636 DOI: 10.1016/j.watres.2023.120875] [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: 08/08/2023] [Revised: 11/02/2023] [Accepted: 11/14/2023] [Indexed: 11/24/2023]
Abstract
Microplastics as a carrier can promote microbial diffusion, potentially influencing the ecological functions of microbial communities in aquatic environments. However, our understanding of the assembly mechanism of microbial communities on different microplastic polymers in freshwater lakes during succession is still insufficient, especially for the eukaryotes. Here, the colonization time, site, and polymer types of microplastics were comprehensively considered to investigate the composition and assembly of prokaryotic and eukaryotic communities and their driving factors during the lacustrine plastisphere formation. Results showed that the particle-associated microorganisms in water were the main source of the plastisphere prokaryotes, while the free-living microorganisms in water mainly accounted for the plastisphere eukaryotes. The response of prokaryotic communities to different microplastic polymers was stronger than eukaryotic communities. The assembly of plastisphere prokaryotic communities was dominated by homogenizing processes (mainly homogenous selection), while the assembly of eukaryotic communities was dominated by differentiating processes (mainly dispersal limitation). Colonization time was an important factor affecting the composition of prokaryotic and eukaryotic communities during the formation of the plastisphere. The Chao1 richness of prokaryotic communities in the plastisphere increased with the increase of colonization time, whereas the opposite was true in eukaryotic communities. This differential response of species diversity and composition of prokaryotic and eukaryotic communities in the plastisphere during dynamic succession could lead to their distinct assembly processes. Overall, the results suggest that distinct assembly of microbial communities in the plastisphere may depend more on specific microbial sub-communities and colonization time than polymer types and colonization site.
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Affiliation(s)
- Weihong Zhang
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Danjiangkou Wetland Ecosystem Field Scientific Observation and Research Station, the Chinese Academy of Sciences & Hubei Province, Wuhan 430074, China
| | - Geetika Bhagwat
- Environmental Plastic and Innovation Cluster, Global Innovation Centre for Advanced Nanomaterials, The University of Newcastle, 2308, NSW, Australia
| | - Thava Palanisami
- Environmental Plastic and Innovation Cluster, Global Innovation Centre for Advanced Nanomaterials, The University of Newcastle, 2308, NSW, Australia
| | - Shuxin Liang
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China; School of Ecology and Environment, Tibet University, Lhasa 850000, China
| | - Wenjie Wan
- University of Chinese Academy of Sciences, Beijing, 100049, China; Danjiangkou Wetland Ecosystem Field Scientific Observation and Research Station, the Chinese Academy of Sciences & Hubei Province, Wuhan 430074, China
| | - Yuyi Yang
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Danjiangkou Wetland Ecosystem Field Scientific Observation and Research Station, the Chinese Academy of Sciences & Hubei Province, Wuhan 430074, China.
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7
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Yang Y, Suyamud B, Liang S, Liang X, Wan W, Zhang W. Distinct spatiotemporal succession of bacterial generalists and specialists in the lacustrine plastisphere. Environ Microbiol 2023; 25:2746-2760. [PMID: 37190986 DOI: 10.1111/1462-2920.16400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 05/02/2023] [Indexed: 05/17/2023]
Abstract
The assembly processes of generalists and specialists and their driving mechanisms during spatiotemporal succession is a central issue in microbial ecology but a poorly researched subject in the plastisphere. We investigated the composition variation, spatiotemporal succession, and assembly processes of bacterial generalists and specialists in the plastisphere, including non-biodegradable (NBMPs) and biodegradable microplastics (BMPs). Although the composition of generalists and specialists on NBMPs differed from that of BMPs, colonization time mainly mediated the composition variation. The relative abundance of generalists and the relative contribution of species replacement were initially increased and then decreased with colonization time, while the specialists initially decreased and then increased. Besides, the richness differences also affected the composition variation of generalists and specialists in the plastisphere, and the generalists were more susceptible to richness differences than corresponding specialists. Furthermore, the assembly of generalists in the plastisphere was dominated by deterministic processes, while stochastic processes dominated the assembly of specialists. The network stability test showed that the community stability of generalists on NBMPs and BMPs was lower than corresponding specialists. Our results suggested that different ecological assembly processes shaped the spatiotemporal succession of bacterial generalists and specialists in the plastisphere, but were less influenced by polymer types.
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Affiliation(s)
- Yuyi Yang
- State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, China
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
- Danjiangkou Wetland Ecosystem Field Scientific Observation and Research Station, Chinese Academy of Sciences & Hubei Province, Wuhan, China
| | - Bongkotrat Suyamud
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
- NUS Environmental Research Institute, National University of Singapore, Singapore, Singapore
| | - Shuxin Liang
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
- College of Science, Tibet University, Lhasa, China
| | - Xinjin Liang
- School of Mechanical and Aerospace Engineering, Queen's University Belfast, Belfast, UK
| | - Wenjie Wan
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
- Danjiangkou Wetland Ecosystem Field Scientific Observation and Research Station, Chinese Academy of Sciences & Hubei Province, Wuhan, China
| | - Weihong Zhang
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China
- University of Chinese Academy of Sciences, Beijing, China
- Danjiangkou Wetland Ecosystem Field Scientific Observation and Research Station, Chinese Academy of Sciences & Hubei Province, Wuhan, China
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Xie M, Lv M, Zhao Z, Li L, Jiang H, Yu Y, Zhang X, Liu P, Chen J. Plastisphere characterization in habitat of the highly endangered Shinisaurus crocodilurus: Bacterial composition, assembly, function and the comparison with surrounding environment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 900:165807. [PMID: 37506917 DOI: 10.1016/j.scitotenv.2023.165807] [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: 07/15/2023] [Accepted: 07/24/2023] [Indexed: 07/30/2023]
Abstract
Plastisphere is a new niche for microorganisms that complicate the ecological effects of plastics, and may profoundly influence biodiversity and habitat conservation. The DaGuishan National Nature Reserve, one of the largest habitats of the highly endangered crocodile lizard (Shinisaurus crocodilurus), is experiencing plastic pollution without sufficient attention. Here, plastisphere collected from captive tanks of crocodile lizards in this nature reserve was characterized for the first time. Three types of plastic (PE-PP, PE1, and PE2) together with the surrounding water and soil samples, were collected, and 16S rRNA sequencing technology was used to characterize the bacterial composition. The results demonstrated that plastisphere was driven by stochastic process and had a distinct bacterial community with higher diversity than that in surrounding water (p < 0.05). Bacteria related to nitrogen and carbon cycles (Pseudomonas psychrotolerans, Methylobacterium-Methylorubrum) were more abundant in plastisphere than in water or soil (p < 0.05). More importantly, plastics recruited pathogens and those bacteria function in antibiotic resistant genes (ARGs) coding. Bacteria related to polymer degradation also proliferated in plastisphere, especially Bacillus subtilis with a fold change of 42.01. The PE2 plastisphere, which had the lowest diversity and was dominated by Methylobacterium-Methylorubrum differed from PE 1 and PE-PP plastispheres totally. Plastics' morphology and aquatic nutrient levels contributed to the heterogeneity of different plastispheres. Overall, this study demonstrated that plastispheres diversify in composition and function, affecting ecosystem services directly or indirectly. Pathogens and bacteria related to ARGs expression enriched in the plastisphere should not be ignored because they may threaten the health of crocodile lizards by increasing the risk of infection. Plastic pollution control should be included in conservation efforts for crocodile lizards. This study provides new insights into the potential impacts of plastisphere, which is important for ecological risk assessments of plastic pollution in the habitats of endangered species.
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Affiliation(s)
- Mujiao Xie
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China
| | - Mei Lv
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China
| | - Zhiwen Zhao
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China
| | - Linmiao Li
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China
| | - Haiying Jiang
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China
| | - Yepin Yu
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China
| | - Xiujuan Zhang
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China
| | - Ping Liu
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China
| | - Jinping Chen
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China.
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Li Z, Wang X, Zhang B, Li B, Du H, Wu Z, Rashid A, Mensah CO, Lei M. Transmission mechanisms of antibiotic resistance genes in arsenic-contaminated soil under sulfamethoxazole stress. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 326:121488. [PMID: 36958659 DOI: 10.1016/j.envpol.2023.121488] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 03/02/2023] [Accepted: 03/21/2023] [Indexed: 06/18/2023]
Abstract
Numerous studies have revealed the spread mechanism of antibiotic resistance genes (ARGs) in single antibiotic-contaminated soils. However, the comprehensive impacts of heavy metals and antibiotics on ARGs and the underlying mechanisms are still unknown. Here, high-throughput quantitative PCR and high-throughput sequencing were used to investigate changes in ARGs and bacterial communities under various sulfamethoxazole (SMX) regimes (0, 1, 10, 50 mg kg-1) in arsenic (As) contaminated soils. The study found that the abundances of ARGs, mobile genetic elements (MGEs), and heavy metal resistance genes (HMRGs) significantly increased in the soil fortified at 10 and 50 mg kg-1 SMX concentrations. The ARGs abundance increased with the increase in the MGEs abundance. Many significant positive correlations between various ARGs subtypes and HMRGs subtypes were found. These results indicate that the HMRGs and MGEs positively contributed to the enrichment of ARGs in As-contaminated soils under SMX stress. Meanwhile, the abundance of copiotrophic (Actinobacteriota) reduced and oligotrophic (Gemmatimonadota) increased, indicating that the life history strategy of the community changed. In addition, Gemmatimonadota was positively correlated to ARGs, HMRGs, and MGEs, suggesting that Gemmatimonadota, which can cope with As and SMX stress, was the host for resistance genes in the soil. Finally, the study found that MGEs play a determinant role in ARGs proliferation due to the direct utilization of HGT, and the indirect effect for ARGs spread under a co-selection mechanism of ARGs and HMRGs, while the bacterial community showed indirect influences by altering environmental factors to act on MGEs. Collectively, this study revealed new insights into the mechanisms of resistance gene transmission under combined SMX and As contamination in soil ecosystems.
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Affiliation(s)
- Zhuoqing Li
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China
| | - Xinqi Wang
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China
| | - Beibei Zhang
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China
| | - Bingyu Li
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China
| | - Huihui Du
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China
| | - Zhibin Wu
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China
| | - Azhar Rashid
- Department of Environmental Sciences, The University of Haripur, Haripur, Pakistan
| | - Caleb Oppong Mensah
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China
| | - Ming Lei
- College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, PR China.
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Zhang W, Wan W, Liu X, Yang Y, Liu M. Stronger Geographic Limitations Shape a Rapid Turnover and Potentially Highly Connected Network of Core Bacteria on Microplastics. MICROBIAL ECOLOGY 2023; 85:1179-1189. [PMID: 35355087 DOI: 10.1007/s00248-022-02000-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 03/17/2022] [Indexed: 05/10/2023]
Abstract
Core microbiota is shared microbial taxa within the same habitat, which is important for understanding the stable and consistent components of the complex microbial assembly. However, information on the microplastic core bacteria from the river ecosystems is poor. Here, we investigated the composition and function of microplastic core bacteria from the Three Gorges Reservoir area along the approximate 662 km of the Yangtze River via full-length 16S rRNA gene sequencing, compared with those in water, sediment, and soil. The results showed that the spatial turnover of bacterial communities in four habitats supported deterministic processes dominated by niche differentiation, which shaped their core bacteria. The composition and function of microplastic core bacteria were significantly different from those in the other three habitats. Rhodobacteraceae was the main component of microplastic core bacteria, while the main component of core bacteria in water, sediment, and soil were Burkholderiaceae (21.90%), Burkholderiaceae (5.01%), Nitrosomonadaceae (4.61%), respectively. Furthermore, microplastic core bacteria had stronger geographic limitations along the Yangtze River in the Three Gorges Reservoir area. Stronger geographic limitations shaped the rapid community turnover and a potentially more connected network for the microplastic core bacteria than water, sediment, and soil. More importantly, microplastic core bacteria had strong potential functions of drug resistance and could cause risks to ecosystems and human health. Microplastic core bacteria were mainly influenced by sediment core bacteria, although the bacteria colonizing on microplastics could be from all the contact environments and original sources. These findings provide important insights into the composition, function, and association of microplastic core bacteria with their surrounding environment.
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Affiliation(s)
- Weihong Zhang
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wenjie Wan
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaoning Liu
- State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, 430072, China
| | - Yuyi Yang
- State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, 430072, China.
- Center of the Plant Ecology, Core Botanical Gardens, Wuhan Botanical Garden Chinese Academy of Sciences, Lumo Road No.1, Wuchang District, Wuhan, 430074, China.
| | - Minxia Liu
- College of Forestry, Shanxi Agricultural University, Taigu County, 030801, China
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Zhang X, Li Y, Lei J, Li Z, Tan Q, Xie L, Xiao Y, Liu T, Chen X, Wen Y, Xiang W, Kuzyakov Y, Yan W. Time-dependent effects of microplastics on soil bacteriome. JOURNAL OF HAZARDOUS MATERIALS 2023; 447:130762. [PMID: 36638676 DOI: 10.1016/j.jhazmat.2023.130762] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 12/26/2022] [Accepted: 01/08/2023] [Indexed: 06/17/2023]
Abstract
Microplastic threats to biodiversity, health and ecological safety are adding to concern worldwide, but the real impacts on the functioning of organisms and ecosystems are obscure owing to their inert characteristics. Here we investigated the long-lasting ecological effects of six prevalent microplastic types: polyethylene (PE), polypropylene (PP), polyamide (PA), polystyrene (PS), polyethylene terephthalate (PET), and polyvinyl chloride (PVC) on soil bacteria at a 2 % (w/w) level. Due to the inertia and lack of available nitrogen of these microplastics, their effects on bacteriome tended to converge after one year and were strongly different from their short-term effects. The soil volumes around microplastics were very specific, in which the microplastic-adapted bacteria (e.g., some genera in Actinobacteria) were enriched but the phyla Bacteroidetes and Gemmatimonadetes declined, resulting in higher microbial nitrogen requirements and reduced organic carbon mineralization. The reshaped bacteriome was specialized in the genetic potential of xenobiotic and lipid metabolism as well as related oxidation, esterification, and hydrolysis processes, but excessive oxidative damage resulted in severe weakness in community genetic information processing. According to model predictions, microplastic effects are indirectly derived from nutrients and oxidative stress, and the effects on bacterial functions are stronger than on structure, posing a heavy risk to soil ecosystems.
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Affiliation(s)
- Xuyuan Zhang
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China; National Engineering Laboratory for Applied Forest Ecological Technology in Southern China, Changsha 410004, China; College of Landscape Architecture, Central South University of Forestry and Technology, Changsha 410004, China
| | - Yong Li
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China; National Engineering Laboratory for Applied Forest Ecological Technology in Southern China, Changsha 410004, China; Laboratory of Urban Forest Ecology of Hunan Province, Changsha 410004, China.
| | - Junjie Lei
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
| | - Ziqian Li
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
| | - Qianlong Tan
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
| | - Lingli Xie
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
| | - Yunmu Xiao
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
| | - Ting Liu
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China; National Engineering Laboratory for Applied Forest Ecological Technology in Southern China, Changsha 410004, China
| | - Xiaoyong Chen
- College of Arts and Sciences, Governors State University, University Park, IL 60484, USA
| | - Yafeng Wen
- College of Landscape Architecture, Central South University of Forestry and Technology, Changsha 410004, China
| | - Wenhua Xiang
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China; National Engineering Laboratory for Applied Forest Ecological Technology in Southern China, Changsha 410004, China; Laboratory of Urban Forest Ecology of Hunan Province, Changsha 410004, China
| | - Yakov Kuzyakov
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China; Department of Agricultural Soil Science, University of Goettingen, 37077 Göttingen, Germany; Dept. of Soil Science of Temperate Ecosystems, University of Goettingen, 37077 Göttingen, Germany; Peoples Friendship University of Russia (RUDN University), 117198 Moscow, Russia
| | - Wende Yan
- College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China; National Engineering Laboratory for Applied Forest Ecological Technology in Southern China, Changsha 410004, China; Laboratory of Urban Forest Ecology of Hunan Province, Changsha 410004, China.
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Geographic Dispersal Limitation Dominated Assembly Processes of Bacterial Communities on Microplastics Compared to Water and Sediment. Appl Environ Microbiol 2022; 88:e0048222. [PMID: 35695570 PMCID: PMC9275213 DOI: 10.1128/aem.00482-22] [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] [Indexed: 12/15/2022] Open
Abstract
Microplastics provide new microbial niches in aquatic environments. Nevertheless, information on the assembly processes and potential ecological mechanisms of bacterial communities on microplastics from reservoirs is lacking. Here, we investigated the assembly processes and potential ecological mechanisms of bacterial communities on microplastics through full-length 16S rRNA sequencing in the Three Gorges Reservoir area of the Yangtze River, compared to water and sediment. The results showed that the Burkholderiaceae were the dominant composition of bacterial communities in microplastics (9.95%), water (25.14%), and sediment (7.22%). The niche width of the bacterial community on microplastics was lower than those in water and sediment. For the microplastics and sediment, distance-decay relationship results showed that the bacterial community similarity was significantly decreased with increasing geographical distance. In addition, the spatial turnover rate of the bacterial community on microplastics along the ~662-km reaches of the Yangtze River in the Three Gorges Reservoir area was higher than that in sediment. Null model analysis showed that the assembly processes of the bacterial community on microplastics were also different from those in water and sediments. Dispersal limitation (52.4%) was the primary assembly process of the bacterial community on microplastics, but variable selection was the most critical assembly process of the bacterial communities in water (47.6%) and sediment (66.7%). Thus, geographic dispersal limitation dominated the assembly processes of bacterial communities on microplastics. This study can enhance our understanding of the assembly mechanism of bacterial communities caused by the selection preference for microplastics from the surrounding environment. IMPORTANCE In river systems, microplastics create new microbial niches that significantly differ from those of the surrounding environment. However, the potential relationships between the biogeographic distribution and assembly processes of microbial communities on microplastics were still not well understood. This study could help us address the lack of knowledge about the assembly processes of bacterial communities on microplastics caused by selection from the surrounding environment. In this study, strong geographic dispersal limitation dominated assembly processes of bacterial communities on microplastics, compared to water and sediment, which may be responsible for the microplastic bacterial richness, and the niche distance was lower than those in water and sediment. In addition, sediment may be the main potential source of bacterial communities on microplastics in the Three Gorges Reservoir area, which makes higher community similarity between microplastics and sediment than between microplastics and water.
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