Spatial Variation in Microbial Community in Response to As and Pb Contamination in Paddy Soils Near a Pb-Zn Mining Site

Zou, Lina; Lu, Yanhong; Dai, Yuxing; Khan, Muhammad Imran; Gustave, Williamson; Nie, J.; Liao, Yulin; Tang, Xianjin; Shi, Jiyan; Xu, Jianming

doi:10.3389/fenvs.2021.630668

Cited by 18 publications

(4 citation statements)

References 91 publications

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“…Several studies have shown that low As pollution (<20 mg kg −1 ) in paddy soils can negatively influence microbial community structure and reduce bacterial diversity and abundance (Chakraborty & Islam, 2018; Sheik et al, 2012). Regression analysis showed that high concentrations of As (up to 262 mg kg −1 ) had negative effects on soil bacterial diversity in rice ecosystems (Figure 2A, Figure S1), which is consistent with the findings of previous studies (Zou et al, 2021). Although the As‐detoxification genes, such as aoxB, arxA, and arsM, were ubiquitous in soil (Zhang et al, 2015; Zhang et al, 2021), As‐detoxification gene diversity (Shannon index) was low in the low‐As (from 9.76 to 19.74 mg kg −1 ) continental paddy soils (Zhang et al, 2021), reflecting the limited capacity of microbes to resist As contamination.…”

Section: Discussionsupporting

confidence: 91%

Arsenic pollution from human activities drives changes in soil microbial community characteristics

Yang

Dai

Yao

et al. 2023

Environmental Microbiology

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Soil arsenic (As) pollution not only decreases plant productivity but also soil quality, in turn hampering sustainable agricultural development. Despite the negative effects of As contamination on rice yield and quality being reported widely, the responses of microbial communities and co‐occurrence networks in paddy soil to As pollution have not been explored. Here, based on high‐throughput sequencing technologies, we investigated bacterial abundance and diversity in paddy soils with different levels of As contamination, and constructed associated microbial co‐occurrence networks. As pollution reduced soil bacterial diversity significantly (p < 0.001). In addition, bioavailable As concentrations were negatively correlated with Actinobacteria and Acidobacteria relative abundance (p < 0.05). Conversely, As pollution had a positive relationship with Chloroflexi, Betaproteobacteria, and Bacteroidetes relative abundance (p < 0.05). Firmicutes relative abundance decreased with an increase in total As concentration. The ecological clusters and key groups in bacterial co‐occurrence networks exhibited distinct trends with an increase in As pollution. Notably, Acidobacteria play an important role in maintaining microbial networks in As contaminated soils. Overall, we provide empirical evidence that As contamination influences soil microbial community structure, posing a threat to soil ecosystem health and sustainable agriculture.

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Section: Discussionsupporting

confidence: 91%

Arsenic pollution from human activities drives changes in soil microbial community characteristics

Yang

Dai

Yao

et al. 2023

Environmental Microbiology

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“…Approximate 50 g rhizosphere and non-rhizosphere sediments in pond 1, ditch, and pond 2 of these two systems were also collected at days 15, 30, and 60, representing the early, middle, and late stages of the experiment, respectively (Zou et al, 2021). About 10 g of fresh sediment samples was used to measure water contents (WC) of each sediment sample gravimetrically.…”

Section: Analysis Of Water and Sedimentsmentioning

confidence: 99%

Response of Sediment Microbial Communities to the Rural Wastewater in the Pond-Ditch Circulation System

Pan

Liu

et al. 2021

Front. Environ. Sci.

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Microorganisms played important roles in nutrient removal in Pond-ditch circulation system (PDCS). However, dynamics of microbial community in the PDCS, and responses of rhizosphere and non-rhizosphere microbial community to rural wastewater remains unclear. In this paper, average operational taxonomic units numbers of sediment microbial varied from 10,254 to 17,112, and values in rhizosphere were higher than those of the non-rhizosphere (p < 0.05). Bacillus, Clostridium sensu stricto 1, and Geobacter were the predominant genera in PDCS sediment with relative abundances of 0.52–17.61%, 0.26–8.08%, and 0.20–4.58%, respectively. However, Bacillus, Clostridium sensu stricto 1, and Geobacter genera in rhizosphere were more abundant than those in non-rhizosphere at day 30. Chao 1 index ranged from 10,225 to 17,033 and showed significant positive correlations with all sediment properties (p < 0.05). Chao 1 and Shannon indices in rhizosphere were significant positively related to tartaric acid and total organic carbon, respectively; while significant correlation between Shannon and Simpson indices in non-rhizosphere and oxidation-reduction potential were detected (p < 0.05). Redundancy analysis suggested that lactic acids, proteins, and amino acids had strong positive effects on Geobacter and Clostridiu sensu stricto 12 in the rhizosphere; while Bacillus and Clostridium in non-rhizosphere were significantly affected by sediment ammonia nitrogen and nitrate nitrogen. Environmental variables accounted for 66.9 and 60.3% of the total variation for the microbial community of non-rhizosphere and rhizosphere sediments, respectively. Our results highlight that root exudates and sediment available N alter predominant genera in the rhizosphere and non-rhizosphere, respectively, which is benefit for optimizing removal efficiency of PDCSs in large-scale applications.

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“…In contrast, the higher relative abundances of Bacteroidota near operating mines suggest that these landscapes could provide favorable conditions for some microorganisms. Bacteroidota usually harbor the majority of heavy metal resistance genes ( Yan et al, 2020 ), and is able to quickly adapt and endure high heavy metal stresses in mining polluted areas ( Zhao et al, 2020a , b ; Zou et al, 2021 ). Characterizing soil properties, assessing dust emissions from mines, and measuring heavy metal concentrations in mosses would be important next steps to further identify the environmental drivers responsible for changes in phyllosphere community structure observed in mine offsite landscapes.…”

Section: Discussionmentioning

confidence: 99%

Out of site, out of mind: Changes in feather moss phyllosphere microbiota in mine offsite boreal landscapes

et al. 2023

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Plant-microbe interactions play a crucial role in maintaining biodiversity and ecological services in boreal forest biomes. Mining for minerals, and especially the emission of heavy metal-enriched dust from mine sites, is a potential threat to biodiversity in offsite landscapes. Understanding the impacts of mining on surrounding phyllosphere microbiota is especially lacking. To investigate this, we characterized bacterial and fungal communities in the phyllosphere of feather moss Pleurozium schreberi (Brid). Mitt in boreal landscapes near six gold mine sites at different stages of the mine lifecycle. We found that (1) both mining stage and ecosystem type are drivers of the phyllosphere microbial community structure in mine offsite landscapes; (2) Bacterial alpha diversity is more sensitive than fungal alpha diversity to mining stage, while beta diversity of both groups is impacted; (3) mixed and deciduous forests have a higher alpha diversity and a distinct microbial community structure when compared to coniferous and open canopy ecosystems; (4) the strongest effects are detectable within 0.2 km from operating mines. These results confirmed the presence of offsite effects of mine sites on the phyllosphere microbiota in boreal forests, as well as identified mining stage and ecosystem type as drivers of these effects. Furthermore, the footprint was quantified at 0.2 km, providing a reference distance within which mining companies and policy makers should pay more attention during ecological assessment and for the development of mitigation strategies. Further studies are needed to assess how these offsite effects of mines affect the functioning of boreal ecosystems.

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Spatial Variation in Microbial Community in Response to As and Pb Contamination in Paddy Soils Near a Pb-Zn Mining Site

Cited by 18 publications

References 91 publications

Arsenic pollution from human activities drives changes in soil microbial community characteristics

Arsenic pollution from human activities drives changes in soil microbial community characteristics

Response of Sediment Microbial Communities to the Rural Wastewater in the Pond-Ditch Circulation System

Out of site, out of mind: Changes in feather moss phyllosphere microbiota in mine offsite boreal landscapes

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