Inherent bacterial community response to multiple heavy metals in sediment from river-lake systems in the Poyang Lake, China

Zhang, Hua; Wan, Zhongping; Ding, Mingjun; Wang, Peng; Xu, Xiangde; Jiang, Yinghui

doi:10.1016/j.ecoenv.2018.09.010

Cited by 79 publications

(18 citation statements)

References 66 publications

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“…Additionally, Granulicatella-whose relative abundance has been negatively associated with dental caries 16 -decreased in abundance with higher levels of antimony. A search for microbiome studies of antimony found only 14 studies (all in soil or water) [17][18][19][20][21][22][23][24][25][26][27][28][29][30] .…”

Section: Discussionmentioning

confidence: 99%

Low levels of salivary metals, oral microbiome composition and dental decay

Davis

Bakulski

Goodrich

et al. 2020

Sci Rep

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Salivary microbiome composition can change following exposure to environmental toxicants, e.g., heavy metals. We hypothesized that levels of salivary nutrients and metals would correlate with salivary microbiome composition and be associated with dental decay. Here we assess the salivary concentrations of 5 essential minerals (cobalt, copper, manganese, molybdenum, and zinc), 4 metals with some evidence of normal physiological function (chromium, nickel, tungsten, and vanadium), and 12 with known toxicity (antimony, arsenic, barium, beryllium, cadmium, cesium, lead, mercury, platinum, thallium, tin, and uranium), and their associations with salivary microbiome composition and dental decay in 61 children and adults. 16 metals were detected in 54% of participants; 8 were found in all. Marked differences in salivary bacterial taxa were associated with levels of antimony, arsenic, and mercury, after adjusting for multiple testing. further, antimony levels were associated with the presence of decayed teeth. thus, salivary metal levels, even at low concentrations, may impact oral health. The salivary microbiome provides a window into the overall health of the body and likely changes in response to environmental exposures, such as metals. Like humans, bacteria require certain metals to carry out metabolic processes, and often compete with host cells to take up these metals through transporters and other acquisition systems 1,2. However, toxicity is a concern for bacteria, as some metals-such as cadmium and copper-are bactericidal at certain concentrations 3. Further, even essential metals can be toxic, depending on the dose (Supplemental Tables S1-S3). Therefore, we hypothesized that there will be changes in the salivary microbiome composition in response to salivary metal levels which may directly affect oral health. Dental caries is the most common chronic disease in children aged 6-19 4 and periodontal disease is the most common cause of adult tooth loss 5. The oral microbiome is an important determinant of both dental caries and periodontal disease. As it is now clear that the microbiome at all body sites responds to environmental stressors such as pathogens and environmental chemicals, it is critical to understand the implications of metal exposures on the structure, composition, and function of the oral microbiome, taking into account whether the metal is exclusively toxic, an essential mineral, or has some physiological functions. When certain toxic metals, e.g., lead or cadmium, are measured in blood or urine the resulting levels can be compared to guidelines for concentrations of concern 6 ; however, no guidelines exist for salivary metal levels. Saliva biomarker exposure assessment could be particularly useful in studies where the oral cavity is the primary target region of toxicity (e.g., studies of the oral microbiome or dental health). Some studies have assessed salivary metals, but the number of publications and the scope of metals assessed are limited. Lead 7,8 and mercury 9 have been of particular intere...

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Section: Discussionmentioning

confidence: 99%

Low levels of salivary metals, oral microbiome composition and dental decay

Davis

Bakulski

Goodrich

et al. 2020

Sci Rep

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“…The river-lake network is an important channel in the Responsible Editor: Lucy Seldin. transformation of terrigenous substance into the wetland ecosystem [2]. It also becomes a natural accumulation hotspot of nutrients due to the violent change of hydrological condition and peculiar characteristics of sedimentary environments [3].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the level of microorganism community composition and possible regulating factors in this lake were under-evaluated. Most of the research focused on the bacterial communities of water [18,19] or sediment [1,2,16,17] separately; little is currently known about the comparison of the microbial diversity and activity between the freshwater and sediment ecological niches. Therefore, the deeper study needs to be explored to understand the relationships of microbial community and environmental parameters between the freshwater and sediment niches.…”

Section: Introductionmentioning

confidence: 99%

The correlation analyses of bacterial community composition and spatial factors between freshwater and sediment in Poyang Lake wetland by using artificial neural network (ANN) modeling

Sun

Fan

et al. 2020

Braz J Microbiol

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As one of the most important components of the lake ecosystem, microorganisms from the freshwater and sediment play an important role in many ecological processes. However, the difference and correlation of bacterial community between these two niches were not clear. This study investigated the diversity of microbial community of freshwater and sediment samples from fifteen locations in Poyang Lake wetland. The correlation between the bacterial community and physicochemical property of Poyang Lake wetland was analyzed by artificial neural network (ANN). Our results demonstrated that the freshwater and sediment bacterial community were dominated by groups of the Bacteroidetes (23.33%) and β-Proteobacteria (22.54%) separately, whereas, Canalipalpata, Bacillariophyta, Gemmatimonadetes, and Verrucomicrobia were detected in freshwater niches only. Phylogenetic analysis further indicated that bacterial composition in freshwater significantly differed with the sediment niches. There are 34 unique species accounted for 85% in fresh water samples and 28 unique species accounted for 82% in sediment samples. Cluster analysis further proved that all the samples from freshwater niches clustered closely together, far from the rest sediment samples. ANN analysis revealed that the freshwater with high N and P nutrients will greatly increase the diversity of the bacterial communities. In general, both environmental physicochemical properties, not each factor independently, contributed to the shift in the bacterial community structure. The five tributaries (Gan, Fu, Xin, Rao, Xiu Rivers) play a vital role in shaping the bacterial communities of Poyang Lake. This study provides new insights for understanding of microbial community compositions and structures of Poyang Lake wetland.

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“…3. The mC d presented the total Ef of heavy elements in environments without regard to the antagonism or mutualism among elements [28,46]. All mC d values for heavy elements at center, extension, and fringe area with two seasons ranged from 2 to 5, which suggested that the street dusts in Nanchang suffered from moderate enrichment by heavy elements.…”

Section: Pollution Assessment Of Heavy Elements In Street Dustsmentioning

confidence: 99%

Pollution Characteristics of Heavy Elements in Nanchang, China Street Dust

Xu¹,

Zhang²,

Xiong³

et al. 2019

Pol. J. Environ. Stud.

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Heavy elements are always the major pollutants in urban areas, and their pollution levels and spatial distributions vary among various land use types. In this study, we investigated the concentrations, pollution levels, spatial-temporal distributions, and health risks of 23 elements in street dusts (<63 μm) along the urban expansion in metropolitan Nanchang. The average concentrations of Cu, Zn, Cd, Pb, Sr, Te, Ba, Sn, Sb, and Bi were distinctly higher than their background values, and most of their enrichment factor (Ef) >2, indicating anthropogenic inputs as the major sources. The majority of elements in dust had high spatial heterogeneities and area characteristics. Seasonality had a minor effect on the variation of element concentrations, but had a significant effect on the modified degree of contamination index (mC d) of elements. The quantity of elements with characteristics of anthropogenic fingerprint (Ef>2) was identified as an indicator of urban expansion due to it being consistent with the distributions of population density and traffic flow. The enrichment of Cd, Sr, and Sb contributed 36.38-46.96% to the mC d. The mC d values decreased significantly along urban expansion, which happened only in summer. Most elements in street dusts had multiple sources and were highly related to the traffic input due to their close correlation with the recognized anthropogenic-related elements such as Cd and Pb. The HI values for all the elements were below the safe level, suggesting a non-carcinogenic risk to inhabitants. The exposure for As and Cd in dusts caused significant carcinogenic risk to inhabitants. High concentration, Ef value, and HI value of Sb possibly caused adverse health risks and requires more attention.

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Inherent bacterial community response to multiple heavy metals in sediment from river-lake systems in the Poyang Lake, China

Cited by 79 publications

References 66 publications

Low levels of salivary metals, oral microbiome composition and dental decay

Low levels of salivary metals, oral microbiome composition and dental decay

The correlation analyses of bacterial community composition and spatial factors between freshwater and sediment in Poyang Lake wetland by using artificial neural network (ANN) modeling

Pollution Characteristics of Heavy Elements in Nanchang, China Street Dust

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