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Wang Y, Liu Y, Xu Z, Chai L, Wang H. Variation in the sensitivity of intestine and skin of Bufo gargarizans and Rana chensinensis tadpoles in relation to zinc exposure. CHEMOSPHERE 2024; 363:142874. [PMID: 39019178 DOI: 10.1016/j.chemosphere.2024.142874] [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: 05/23/2024] [Revised: 07/06/2024] [Accepted: 07/14/2024] [Indexed: 07/19/2024]
Abstract
Zinc (Zn) contaminants in the aquatic environment have an intricate impact on amphibians. Amphibian gut and skin microbiota are participated in regulating their normal physiological functions. Here, we investigated the effects of Zn on the gut and skin tissues and microbiota of Bufo gargarizans and Rana chensinensis tadpoles using histological methods and 16S rRNA sequencing technology. Our results showed a decrease in the height of enterocytes and skin epithelial cells after Zn treatment. Furthermore, Zn exposure elicited alterations in the composition and structure of the gut and skin microbiota at the phylum and genus levels in Bufo gargarizans and Rana chensinensis tadpoles. The feature predictions revealed an elevation in the abundance of potentially pathogenic bacteria and stress-tolerant bacteria in the gut and skin of both tadpoles after zinc exposure. We also speculated that microbiota from various species and organs exhibit varying degrees of sensitivity to zinc based on the functional predictions results. In the context of increasing environmental pollution and the global amphibians decline, our research enriches the current understanding of effects of zinc on amphibian microbiota and provides new framework for artificial breeding and amphibian conservation.
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Affiliation(s)
- Yaxi Wang
- College of Life Science, Shaanxi Normal University, Xi'an, 710119, China.
| | - Ying Liu
- College of Life Science, Shaanxi Normal University, Xi'an, 710119, China
| | - Zhangying Xu
- College of Life Science, Shaanxi Normal University, Xi'an, 710119, China
| | - Lihong Chai
- School of Water and Environment, Chang'an University, Xi'an, 710054, China; Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang'an University, Xi'an, 710062, China
| | - Hongyuan Wang
- College of Life Science, Shaanxi Normal University, Xi'an, 710119, China.
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Shen Y, Jiang Z, Zhong X, Wang H, Liu Y, Li X. Manipulation of cadmium and diethylhexyl phthalate on Rana chensinensis tadpoles affects the intestinal microbiota and fatty acid metabolism. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 821:153455. [PMID: 35093358 DOI: 10.1016/j.scitotenv.2022.153455] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 01/17/2022] [Accepted: 01/22/2022] [Indexed: 06/14/2023]
Abstract
Gastrointestinal tract and intestine microbiota can both have deep effects on the lipid metabolism and immune function of amphibians. Additionally, the composition and structure of the microbial community are influenced by environmental pollutions. It is noteworthy that environmental compounds such as Cd and DEHP are pervasive in the aquatic environment and do not exist in isolation, and single exposure experiments cannot well explain the effects of unpredictable interactions between co-existing compounds on amphibians. In this study, we calculated the parameters of morphological and histological indices of Rana chensinensis tadpoles after treated with Cd and/or DEHP. The 16S rRNA gene sequencing technology was used to assess the relative abundance of intestinal microbial community among tadpoles from each treatment groups. We also examined the mRNA expression levels of lipid digestion and absorption and SCFAs related-genes. Our results indicated that all morphological and histological indices were significantly declined in the Cd treatment group, while the mixed treatment group was similar to the control group. Compared with the control group, the relative abundances of Firmicutes, Proteobacteria and Verrucomicrobia exhibited distinctive differences in Cd and/or DEHP treatment groups. Further, RT-qPCR results revealed that the expression levels of lipid metabolism and SCFAs related-genes were also significantly altered among the treatment groups. Taken together, the present study highlighted a new evidence that the alterations in intestinal microbial community and mRNA expression levels of larval amphibians after exposure to Cd and/or DEHP may impair lipid storage and transport, as well as reduce anti-inflammatory capacity, which may ultimately lead to a decline in amphibian populations.
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Affiliation(s)
- Yujia Shen
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Zhaoyang Jiang
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Xinyi Zhong
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Hemei Wang
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Yutian Liu
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Xinyi Li
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China.
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Li Z, Xu S, Xiao G, Qian L, Song Y. Removal of hexavalent chromium from groundwater using sodium alginate dispersed nano zero-valent iron. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 244:33-39. [PMID: 31108308 DOI: 10.1016/j.jenvman.2019.04.130] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 04/23/2019] [Accepted: 04/30/2019] [Indexed: 05/28/2023]
Abstract
Hexavalent chromium (Cr), one of the most common heavy metals, is widely found in contaminated soil and groundwater. Nano zero-valent iron (nZVI) is used to treat Cr(VI) in polluted groundwater. However, due to agglomeration, rapid sedimentation, and limited mobility of nanoparticles in the aquatic environment, nZVI is not widely used in groundwater treatment. In this study, we used sodium alginate (SA) to modify nZVI to generate dispersed SA-nZVI. SA-nZVI particles were found to embed in the polymer material and exist as an amorphous state with a diameter less than 100 nm. Compared with traditional nZVI and carboxymethyl cellulose (CMC)-nZVI, SA-nZVI had better stability and higher absolute zeta potential. The presence of SA enhanced mobility of nZVI and effectively prevented sedimentation and aggregation. Furthermore, SA-nZVI had a higher Cr(VI) removal rate than (CMC)-nZVI under both acidic and alkaline conditions. XPS analysis showed that Cr(VI) was reduced to Cr(III) and formed Cr(OH)3 as precipitates after treatment with SA-nZVI. In addition, NO3- had no effect on the final removal rate of Cr(VI) by SA-nZVI. These results suggest that SA-nZVI has high penetration and a high removal rate in Cr(VI) removal and can be used to stabilize nZVI to remediate Cr(VI)-contaminated groundwater in the future.
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Affiliation(s)
- Zihan Li
- Environmental Protection Research Institute of Light Industry, Beijing Academy of Science and Technology, Beijing, China
| | - Shuyuan Xu
- Environmental Protection Research Institute of Light Industry, Beijing Academy of Science and Technology, Beijing, China
| | - Guanghui Xiao
- College of Life Science, Shaanxi Normal University, Xi'an, China
| | - Limin Qian
- Environmental Protection Research Institute of Light Industry, Beijing Academy of Science and Technology, Beijing, China
| | - Yun Song
- Environmental Protection Research Institute of Light Industry, Beijing Academy of Science and Technology, Beijing, China; Beijing Key Laboratory of Industrial Land Contamination and Remediation, Beijing, China.
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Wei X, Liang W. Multifactor relationships between stand structure and soil and water conservation functions of Robinia pseudoacacia L. in the Loess Region. PLoS One 2019; 14:e0219499. [PMID: 31291341 PMCID: PMC6619771 DOI: 10.1371/journal.pone.0219499] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Accepted: 06/25/2019] [Indexed: 11/20/2022] Open
Abstract
Ninety-six sample plots were established for a tree census to explore the multifactor relationships between the soil and water conservation functions and the stand structure in a typical black locust (Robinia pseudoacacia L.) plantation in the Caijiachuan watershed of the Loess Plateau, Western Shanxi Province, China. Based on the observational and experimental data, a topography-structure-function model was built using a structural equation modeling (SEM) approach. The latent variables were the topographical factors, horizontal structure, vertical structure, soil and water conservation, and sediment reduction. The results indicated that the horizontal structure of the Robinia pseudoacacia L. forest was the most obvious latent variable, which was expressed in the path coefficient (pc = 0.85) corresponding to the sediment reduction; the stand density and tree competition index were the major drivers of the structure, with path coefficients of −0.96 and −0.92 and influence coefficients of −0.997 and −0.998. These factors are easily regulated. Among these factors the stand density of the arbor layer is recommended to be kept stable within the range from 1600 to 1700 trees/hm2. These relationships showed that reducing the tree competition index and changing the microtopography could effectively enhance the soil and water conservation functions in this ecologically significant loess area.
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Affiliation(s)
- Xi Wei
- College of Forestry, Shanxi Agricultural University, Taigu, China
- Ji County Station, Chinese National Ecosystem Research Network (CNERN), Beijing, China
| | - Wenjun Liang
- College of Forestry, Shanxi Agricultural University, Taigu, China
- * E-mail:
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Shen Y, Ji Y, Li C, Luo P, Wang W, Zhang Y, Nover D. Effects of Phytoremediation Treatment on Bacterial Community Structure and Diversity in Different Petroleum-Contaminated Soils. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15102168. [PMID: 30279389 PMCID: PMC6211031 DOI: 10.3390/ijerph15102168] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Revised: 09/09/2018] [Accepted: 09/19/2018] [Indexed: 01/18/2023]
Abstract
Increased exploitation and use of petroleum resources is leading to increased risk of petroleum contamination of soil and groundwater. Although phytoremediation is a widely-used and cost-effective method for rehabilitating soils polluted by petroleum, bacterial community structure and diversity in soils undergoing phytoremediation is poorly understood. We investigate bacterial community response to phytoremediation in two distinct petroleum-contaminated soils (add prepared petroleum-contaminated soils) from northwest China, Weihe Terrace soil and silty loam from loess tableland. High-throughput sequencing technology was used to compare the bacterial communities in 24 different samples, yielding 18,670 operational taxonomic units (OTUs). The dominant bacterial groups, Proteobacteria (31.92%), Actinobacteria (16.67%), Acidobacteria (13.29%) and Bacteroidetes (6.58%), increased with increasing petroleum concentration from 3000 mg/kg–10,000 mg/kg, while Crenarchaeota (13.58%) and Chloroflexi (4.7%) decreased. At the order level, RB41, Actinomycetales, Cytophagales, envOPS12, Rhodospirillales, MND1 and Xanthomonadales, except Nitrososphaerales, were dominant in Weihe Terrace soil. Bacterial community structure and diversity in the two soils were significantly different at similar petroleum concentrations. In addition, the dominant genera were affected by available nitrogen, which is strongly associated with the plants used for remediation. Overall, the bacterial community structure and diversity were markedly different in the two soils, depending on the species of plants used and the petroleum concentration.
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Affiliation(s)
- Yuanyuan Shen
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710064, Shaanxi, China.
- School of Biological and Environmental, Xi'an University, Xi'an 710065, Shaanxi, China.
- Engineering Research Center for Groundwater and Eco-Environment of Shaanxi Province, Xi'an 710054, Shaanxi, China.
| | - Yu Ji
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710064, Shaanxi, China.
| | - Chunrong Li
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710064, Shaanxi, China.
| | - Pingping Luo
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710064, Shaanxi, China.
| | - Wenke Wang
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710064, Shaanxi, China.
| | - Yuan Zhang
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, Xi'an 710064, Shaanxi, China.
| | - Daniel Nover
- School of Engineering, University of California-Merced, Merced, CA 95343, USA.
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de Souza JM, Rabelo LM, de Faria DBG, Guimarães ATB, da Silva WAM, Rocha TL, Estrela FN, Chagas TQ, de Oliveira Mendes B, Malafaia G. The intake of water containing a mix of pollutants at environmentally relevant concentrations leads to defensive response deficit in male C57Bl/6J mice. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 628-629:186-197. [PMID: 29432930 DOI: 10.1016/j.scitotenv.2018.02.040] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 02/03/2018] [Accepted: 02/03/2018] [Indexed: 06/08/2023]
Abstract
Previous studies have individually confirmed the toxic effects from different pollutants on mammals. However, effects resulting from the exposure of these animals to multi-pollutant mixes have not been studied so far. Thus, the aim of the current study is to assess the effect from the chronic exposure (105days) of C57Bl/6J mice to a mix of pollutants on their response to potential predators. In order to do so, the following groups were formed: "control", "Mix 1× [compounds from 15 pollutants identified in surface waters at environmentally relevant concentration (ERC)]", "Mix 10×" and "Mix 25×" (concentrations 10 and 25 times higher than the ERC). From the 100th experimental day on, the animals were subjected to tests in order to investigate whether they showed locomotor, visual, olfactory and auditory changes, since these abilities are essential to their anti-predatory behavior. Next, the animals' behavior towards potential predators (Felis catus and Pantherophis guttatus) was assessed. The herein collected data did not show defensive response from any of the experimental groups to the predatory stimulus provided by P. guttatus. However, the control animals, only, presented anti-predatory behavior when F. catus was introduced in the apparatus, fact that suggests defensive response deficit resulting from the treatments. Thus, the current study is pioneer in showing that the chronic intake of water containing a mix of pollutants (even at low concentrations) leads to behavioral disorders able to affect the survival and population dynamics of mammalian species at ecological level.
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Affiliation(s)
- Joyce Moreira de Souza
- Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute of Education, Science and Technology, Urutaí Campus, GO, Brazil
| | | | - Denise Braga Gomes de Faria
- Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute of Education, Science and Technology, Urutaí Campus, GO, Brazil
| | - Abraão Tiago Batista Guimarães
- Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute of Education, Science and Technology, Urutaí Campus, GO, Brazil
| | - Wellington Alves Mizael da Silva
- Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute of Education, Science and Technology, Urutaí Campus, GO, Brazil
| | - Thiago Lopes Rocha
- Laboratory of Environmental Biotechnology and Ecotoxicology, Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, Goiás, Brazil
| | | | | | - Bruna de Oliveira Mendes
- Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute of Education, Science and Technology, Urutaí Campus, GO, Brazil
| | - Guilherme Malafaia
- Post-Graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute of Education, Science and Technology, Urutaí Campus, GO, Brazil; Biological Research Laboratory, Goiano Federal Institute, Urutaí Campus, GO, Brazil.
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