Magnetotactic bacteria diversity of and magnetism contribution to sediment in Wudalianchi volcanic barrier lakes, NE China

Xing, Weijia; Hu, Hui-Xin; Zhao, Dan; Wang, Weidong; Hong, Pan; Zhang, Shuang; Yan, Lei

doi:10.1016/j.scitotenv.2020.137348

Cited by 11 publications

(2 citation statements)

References 41 publications

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“…Wenbo Lake has been reported to be located in the high magnetic field area of Wudalianchi and contains a high concentration of iron compounds (Xing et al . 2020). Therefore, Wenbo Lake is unique and may be an ideal habitat for FeRB.…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic diversity contributes more to sediment magnetism than abundance during incubation of iron‐reducing sediment from a non‐active volcanic lake in Northeast China

et al. 2021

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Aim This study aimed to analyse bacterial community and biomineralization products from Wudalianchi non‐active volcanic field and the relationship between magnetization and bacterial community. Methods and Results Eighteen sediment samples obtained from Wenbo Lake, high‐throughput sequencing and quantitative PCR (qPCR) were separately employed to investigate the bacterial community composition dynamics and abundance variation of the sediment sample with the highest iron‐reducing capacity during incubation. The mineralization products were characterized by transmission electron microscopy, scanning electron microscopy, X‐ray diffraction (XRD), Raman spectroscopy, vibrating sample magnetometer (VSM) and variable‐temperature magnetism analyses. The results showed that the highest iron reduction rate was 98·06%. Seven phyla were identified as dominant bacterial phyla during the incubation process. Iron‐reducing bacteria (FeRB) including Geobacter, Desulfosporosinus and Clostridium were involved in the iron mineralization process. The 16S rDNA copy numbers of sediment decreased quickly and then stayed steady during the incubation. Bacteria with rod‐shaped and spheroid species were involved in extracellular iron reduction to produce magnetic particles with massive aggregation and columnar structures on the mineral surface morphologies. The materials produced by the microbial community over the incubation period were sequentially identified as siderite, magnetite and maghemite. The magnetism of the mineral samples gradually increased from 0·31748 to 33·58423 emu g−1 with increased incubation time. The final products showed relatively stable magnetism under 0–400 K. Meanwhile, the saturation magnetization (MS) of the mineralized substance was tightly associated with bacterial diversity (P < 0·05). Conclusions Bacterial community varied during incubation of iron‐reducing sediment of volcanic lake. Various iron mineral crystals were in turn formed extracellularly by FeRB. The magnetism of mineralized products was tightly associated with bacterial community. Significance and Impact of the Study These results not only help us to better understand the iron mineralization of FeRB in the volcanic lake sediments but also provide basic information for the future application of FeRB in environmental bioremediation.

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Section: Introductionmentioning

confidence: 99%

Phylogenetic diversity contributes more to sediment magnetism than abundance during incubation of iron‐reducing sediment from a non‐active volcanic lake in Northeast China

et al. 2021

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“…The Wudalianchi volcanic area is a typical terrestrial Cenozoic monogenetic volcanic group, which originated from partial melting of the mantle composed of a carbonate asthenosphere (in the mantle transition zone) (Tian et al 2016;Lu et al 2020). Volcanic material from different volcanoes is from the same magmatic source and deposited within the Quaternary strata, resulting in similar geological and sediment chemical characteristics (Xing et al 2020). Wudalianchi volcanic rocks are the most typical Cenozoic potassic volcanic rocks in eastern China (Wang et al 1988).…”

Section: Introductionmentioning

confidence: 99%

Water-source contributions to barrier lakes and water-rock interactions in the Wudalianchi volcanic area, Northeast China

2021

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Wudalianchi is a typical continental Cenozoic volcanic group rich in potassic volcanic rocks (Northeast China). Five hydrologically connected barrier lakes (Lakes 5 to 1) and upwelling cold mineral springs occur, forming a complex lake-groundwater system. Clarifying the water-source contributions and the role of water-rock interactions in the hydrological cycling for barrier lakes remains a challenge from scientific and engineering perspectives. In this study, seasonal variations of multiple isotopes were analyzed. δ18O and δD data indicate that the Wudalianchi lakes were mainly fed by mineral springs. The values, however, were greatly influenced by precipitation (rain and snow) and varying evaporation intensities. In contrast, 87Sr/86Sr ratios varied little between seasons (0.70701–0.7079), suggesting similar water-rock interactions through time. Nonetheless, Sr isotopic mixing models suggested that shallow mineral springs generally contributed >50% of the water to lower reaches. In contrast, the upstream wetland contributed >50% to Lake 5 and decreased down-valley (10.3–53.6%). Calculations based on the δ18O and δD Rayleigh fractionation equation suggest that evaporation in upper reaches were higher than the lower reaches. The evaporation in July were generally higher than in October. This study demonstrates the homogenous water-rock interactions and the associated water mixing effects on the terrestrial volcanic area.

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Magnetic Nanoparticles from Bacteria

Markande

Mistry

Undaviya

et al. 2021

Nanotechnology in the Life Sciences

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Magnetotactic bacteria diversity of and magnetism contribution to sediment in Wudalianchi volcanic barrier lakes, NE China

Cited by 11 publications

References 41 publications

Phylogenetic diversity contributes more to sediment magnetism than abundance during incubation of iron‐reducing sediment from a non‐active volcanic lake in Northeast China

Phylogenetic diversity contributes more to sediment magnetism than abundance during incubation of iron‐reducing sediment from a non‐active volcanic lake in Northeast China

Water-source contributions to barrier lakes and water-rock interactions in the Wudalianchi volcanic area, Northeast China

Magnetic Nanoparticles from Bacteria

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