sp. nov. and sp. nov.: Novel Gut Bacteria from Red Snow Crab.

Two yellow-coloured, Gram-stain-positive, oxidase-negative, aerobic, non-motile, and rod-shaped strains, labelled as ProA8 and ProA11, were isolated from digestive tract of red snow crab (). Strain ProA8 grow at temperature range of 15-35°C, while strain ProA11 grow at temperature range of 15-40°C. Phylogenetic and 16S rRNA gene sequence analysis revealed that strains ProA8 and ProA11 belonged to the genera and , respectively.

Arvimicrobium flavum gen. nov., sp. nov., A Novel Genus in the Family Phyllobacteriaceae Isolated From Forest Soil.

During the study of microbial diversity of forest soil in the Republic of Korea, a yellow pigment-producing, Gram-stain-negative, rod-shaped, motile bacterium was isolated and designated as strain 1W2. This strain grew at temperature of 10-37 °C, at pH of 5.0-9.

sp. nov., Isolated from Soil.

An aerobic, Gram-stain-negative, catalase-positive, rod-shaped, and motile bacteria, designated as a strain WR6 was isolated from soil in Republic of Korea. Strain WR6 grew at temperatures of 10-37°C, at pH of 5.0-9.

sp. nov., sp. nov., sp. nov., sp. nov., sp. nov., and sp. nov., isolated from soil.

Four Gram-stain-positive and two Gram-stain-negative bacterial strains, designated as W4, FW7, TW48, UW52, PT-3, and RJY3, were isolated from soil samples collected from the Republic of Korea. The 16S rRNA gene sequence analysis showed that strains W4 and FW7 belonged to the genus , strains TW48 and UW52 were affiliated to the genus strain PT-3 was related to the genus , and strain RJY3 was associated with the genus . The closest phylogenetic taxa to W4, FW7, TW48, UW52, PT-3, and RJY3 were NEAU-LLE (97.

sp. nov., Isolated from Soil.

A Gram-stain-positive, aerobic, white-coloured, rod-shaped bacteria, designated as a strain dW9, was isolated from soil. Strain dW9 was catalase-positive and oxidase-negative. Strain dW9 grew at temperature of 20-37°C and at pH of 5.

sp. nov., sp. nov., and sp. nov., Isolated from Soil.

Three Gram-stain-positive, aerobic, rod-shaped, and non-motile bacteria, labelled as W11, SW19, and YR1, were isolated from soil, and performed their polyphasic taxonomic investigation. The phylogenetic and 16S rRNA gene sequence analysis showed that strains W11, SW19, and YR1 belonged to the genera , , and , respectively. Strain W11 was closely affiliated with SYSU K20354 (98.

sp. nov. and sp. nov., isolated from an automobile air conditioning system.

Two strictly aerobic and rod-shaped bacteria, labelled as DB1703 and DB2414S, were obtained from an automobile air conditioning system. Strain DB1703 was Gram-stain-negative, while strain DB2414S was Gram-stain-positive. Both strains were catalase-positive and oxidase-negative.

The release, degradation, and distribution of PVC microplastic-originated phthalate and non-phthalate plasticizers in sediments.

This study investigated the leaching of phthalate and non-phthalate plasticizers from polyvinyl chloride microplastics (MPs) into sediment and their degradation over a 30-d period via abiotic and biotic processes. The results showed that 3579% of plasticizers were released into the sediment from the MPs and > 99.9% degradation was achieved.

Distribution of mercury in modern bottom sediments of the Beaufort Sea in relation to the processes of early diagenesis: Microbiological aspect.

This study investigated the contents of total mercury (THg), trace metals, and CH and determined the signature microbes involved in various biogeochemical processes in the sediment of the Canadian Beaufort Sea. The THg ranged between 32 and 63 μg/kg and the trace metals such as Fe, Al, Mn, and Zn were significant in distributions. The pH, SO, Fe, and redox proxy metals were crucial factors in the spatial and vertical heterogeneity of geochemical distributions.

Sphingomonas flavescens sp. nov., isolated from soil.

An aerobic bacterium, designated as PT-12, was isolated from soil collected from agriculture field, and its taxonomic position was validated through a comprehensive polyphasic methodology. The strain was identified as Gram-stain-negative, non-motile, rod-shaped, and catalase- and oxidase-positive. The yellow-colored colonies showed growth ability at temperature range of 18-37 °C, NaCl content of 0-1.

Paenibacillus silvisoli sp. nov. and Paenibacillus humicola sp. nov., isolated from forest soil.

During the study of microbial ecology of forest soil, two circular, white-colored bacterial colonies were isolated and labeled as strains TW38 and TW40. Both strains were catalase positive and oxidase negative. Strains TW38 and TW40 demonstrated growth within a temperature range of 10-37 °C and 18-37 °C, respectively, and thrived within a pH range of 5.

Depth-dependent microbial communities potentially mediating mercury methylation and various geochemical processes in anthropogenically affected sediments.

Metal contamination and other geochemical alterations affect microbial composition and functional activities, disturbing natural biogeochemical cycles. Therefore, it is essential to understand the influences of multi-metal and geochemical interactions on microbial communities. This work investigated the distributions of total mercury (THg), methylmercury (MeHg), and trace metals in the anthropogenically affected sediment.

Paenibacillus agricola sp. nov., isolated from agricultural soil.

A white-coloured, rod-shaped, motile, aerobic, and Gram-stain-positive bacterial strain S3N08 was isolated from agricultural soil. The strain grew at temperature 10-40 °C, at 0-1.0% (w/v) NaCl concentration, and at pH 6.

Enrichment cultivation of VOC-degrading bacteria using diffusion bioreactor and development of bacterial-immobilized biochar for VOC bioremediation.

Volatile organic compounds (VOCs) have been globally reported at various sites. Currently, limited literature is available on VOC bioremediation using bacterial-immobilized biochar (BC-B). In this study, multiple VOC-degrading bacteria were enriched and isolated using a newly designed diffusion bioreactor.

Mercury and other trace elements distribution and profiling of microbial community in the surface sediments of East Siberian Sea.

In this study, total mercury (THg), methylmercury (MeHg), various trace elements, and microbial communities were measured in surface sediments of the East Siberian Sea (ESS). The results showed that the average values of THg and MeHg were 58.8 ± 15.

Impact of sulfur-impregnated biochar amendment on microbial communities and mercury methylation in contaminated sediment.

S-impregnation of biochar through elemental S streaming is known to increase its sorption performance against Hg and methyl mercury (MeHg). However, the effects of %S-loading on biochar's mechanism and sorption capacities for MeHg, and its consequent impact when used as an amendment material for Hg-contaminated sediments, are poorly understood, and thus, were investigated in this work. Our results showed that a minimum sulfur loading of 1% was the most effective in reducing MeHg levels in sediments.

Seasonal trends of mercury bioaccumulation and assessment of toxic effects in Asian clams and microbial community from field study of estuarine sediment.

This study investigated seasonal trends in bioaccumulation potential and toxic effects of mercury (Hg) in Asian clams (Corbicula fluminea) and microbial community. For this, a clam-exposure experiment was performed during summer, fall, and winter seasons in four different sites (HS1: control/clean site; HS2, HS3, and HS4: contaminated sites) of Hyeongsan River estuary, South Korea. Total mercury (THg) and methylmercury (MeHg) in whole sediments were highest at HS4 site during fall, sustained similar levels during winter, but decreased during summer.

Insights into Bacterial Community Structure and Metabolic Diversity of Mercury-Contaminated Sediments from Hyeongsan River, Pohang, South Korea.

This study investigated the bacterial community structure and metabolic diversity and their relationship with Hg and other environmental variables in sediments collected from different locations (HSR-1-HSR-6) in the Hyeongsan River estuary in South Korea. The results showed that the highest total mercury (THg) and methylmercury (MeHg) concentrations were in HSR-2, with values of 4585.3 µg/kg and 13.

Genome mining revealed polyhydroxybutyrate biosynthesis by Ramlibacter agri sp. nov., isolated from agriculture soil in Korea.

A white-colony-forming, facultative anaerobic, motile and Gram-stain-negative bacterium, designated G-1-2-2 was isolated from soil of agriculture field near Kyonggi University, Republic of Korea. Strain G-1-2-2 synthesized the polyhydroxybutyrate and could grow at 10-35 °C. The phylogenetic analysis based on 16S rRNA gene sequence showed that, strain G-1-2-2 formed a lineage within the family Comamonadaceae and clustered as a member of the genus Ramlibacter.

sp. nov., isolated from oil-contaminated soil.

A yellow-coloured, Gram-stain-positive, motile, aerobic and rod-shaped bacteria, designated DKR-3, was isolated from oil-contaminated experimental soil. Strain DKR-3 could grow at pH 5.0-10.

Kaistella soli sp. nov., isolated from oil-contaminated experimental soil.

A light yellow-coloured, non-motile, aerobic, Gram-stain-negative, and rod-shaped bacterial strain DKR-2 was isolated from oil-contaminated experimental soil. The strain was catalase and oxidase positive, and grew at 0-1.5% (w/v) NaCl concentration, at temperature 10-35 °C, and at pH 6.

Co-composting of food waste and swine manure augmenting biochar and salts: Nutrient dynamics, gaseous emissions and microbial activity.

The prominent characteristics of the biochar, high porosity, sorption capacity with low density improve the aeration, making it a desirable amendment material for composting process. The composting efficiency was analysed by the impact of rice husk biochar amendment (0, 2, 4, 6, 8 and 10%) in the presence of salts for the co-composting of food waste and swine manure, in composting reactors for 50 days. Results revealed that biochar amendment had improved the degradation rates by microbial activities in comparison with control.

Reduction in mercury bioavailability to Asian clams (Corbicula fluminea) and changes in bacterial communities in sediments with activated carbon amendment.

Activated carbon (AC) amendment is considered as one of the alternatives for managing and remediating mercury (Hg) contaminated sediments because of its high sorptive capacity and potential to immobilize the contaminant. For this study, the underlying mechanisms that control the reduction of Hg bioavailability in AC-amended estuarine sediments were investigated in box microcosm set-ups with 28-day Asian clam bioassay experiments. The application of diffusive gradients in thin film technique (DGT) revealed that the total mercury and methylmercury levels in sediment pore water decreased by 60%-75% in 1%-3% AC-amended sediments.