Article
Environmental Sciences
Derek G. Tollette, Behzad Mortazavi, Corianne Tatariw, Nikaela Flournoy, Patricia A. Sobecky
Summary: Coastal marshes play a crucial role in removing excess nitrogen from coastal waters. This study investigates the impact of water accommodated fraction (WAF) of oil on nitrogen cycling capacity in marsh sediments. The results show that oil contamination alters the microbial community structure and affects nitrogen cycling processes in salt marsh sediments.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Agricultural Engineering
Kejin Chen, Xiajie Deng, Li 'ao Wang, Rong He, Yinghuan Yang, Jiaojiao Jiang, Chao Zhang, Shuiwen Yang, Li Fan, Lei Wang, Xiang Wang
Summary: The study found that adding specific functional strains can promote the decomposition of organic matter in the fermentation process of domestic waste, improve gas production efficiency, and thus improve the energy recovery efficiency of landfills.
BIOMASS & BIOENERGY
(2021)
Article
Environmental Sciences
Zhenzhen Teng, Yu Zhen, Zhigang Yu, Tiezhu Mi, Tao Cai
Summary: In this study, the community structure and function of denitrifying and anammox microorganisms in the sediments of the Yangtze Estuary and its adjacent sea were analyzed using high-throughput sequencing, qPCR, and isotope techniques. The results showed that denitrification was the dominant contributor to nitrogen removal processes, and sediment Chla was a key factor regulating the rates of denitrification and anammox.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Microbiology
Valerie Van Eesbeeck, Ruben Props, Mohamed Mysara, Pauline C. M. Petit, Corinne Rivasseau, Jean Armengaud, Pieter Monsieurs, Jacques Mahillon, Natalie Leys
Summary: The microbial community in the water basin surrounding the BR2 nuclear research reactor in Belgium showed significant shifts between operation cycles and shutdowns, with the system remaining stable over a two-year period. Radiation was hypothesized to decrease cell numbers, while temperature had the opposite effect. Chemoautotrophic use of H-2 and dead cell recycling were proposed as strategies for nutrient retrieval in this extremely oligotrophic environment.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Yolanda Espin, Alfonso Menchen, Jose Luis Moreno, David Sanz, Manuel Alvarez-Orti, Jose Antonio Fernandez, Juan Jose Gomez-Alday
Summary: Lake Alboraj in southeast Spain was declared a natural Microreserve and included in the European Natura-2000 Network due to its environmental heritage contribution. However, the lake's ecological status has dramatically changed, largely due to groundwater abstractions for irrigation. Research shows a clear gradient in bacterial community structure in the lake, supporting the co-existence of assimilatory and dissimilatory microbial mediated reactions.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Alexey V. Safonov, Anatoly E. Boguslavsky, Olga L. Gaskova, Kirill A. Boldyrev, Olga S. Shvartseva, Albina A. Khvashchevskaya, Nadezhda M. Popova
Summary: This study reveals that nitrate influences the redox conditions in groundwater, impacting the behavior of uranium, and highlights the need to assess the long-term stability of uranium in environments related to radioactive sludge storage facilities.
APPLIED SCIENCES-BASEL
(2021)
Article
Environmental Sciences
Yongchao Gao, Liyuan Yuan, Jianhua Du, Hui Wang, Xiaodong Yang, Luchun Duan, Liwen Zheng, Md Mezbaul Bahar, Qingqing Zhao, Wen Zhang, Yanju Liu, Zhaoyang Fu, Wei Wang, Ravi Naidu
Summary: Crude oil contamination has a significant impact on soil bacterial community, leading to an increase in hydrocarbon-degrading bacteria and a decrease in nitrogen availability. The soils around oil wells in the Yellow River Delta Natural Reserve harbor various aerobic and anaerobic hydrocarbon-degrading bacteria, which could be beneficial for the bioremediation of crude oil-contaminated soil.
Article
Green & Sustainable Science & Technology
Xiao Zha, Jun Ma, Juanhong Li, Xiwu Lu
Summary: Investigating microbial communities is beneficial for evaluating the effectiveness of wastewater treatment devices. A novel five-section anoxic/aerobic device was proposed and proved feasible in bio-ecosystems, with distinct microbial communities formed in different sections. The device's diverse microbial community efficiently removes pollutants, making it suitable for rural areas with low-strength wastewater.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
B. Read-Daily, S. Ben Maamar, F. Sabba, S. Green, R. Nerenberg
Summary: This study found that N2O has a significant impact on mixed denitrifying communities. The presence of N2O alone selects for a low-diversity, fully denitrifying community, while the presence of N2O with NO2- or NO3- promotes more diverse microbial communities.
Article
Microbiology
Limin Xue, Liu Tang, Juanjuan Zhao, Zhenjuan Fang, Hanxu Liu, Jianjun Qiao, Guishan Zhang
Summary: Strain WN066(T) isolated from saline-alkali wetland soil in Tianjin, China represents a novel species within the genus Bacillus, named B. salipaludis sp. nov. This strain is able to grow under high salt and alkaline conditions, and possesses unique cellular fatty acids and polar lipids.
ARCHIVES OF MICROBIOLOGY
(2021)
Article
Engineering, Environmental
Alessio Fenu, Lennert Dockx, Van Damme Sandra, Wynants Frederik, Kirke Verhaeghe, Van Laer Koen, Roels Joris, Delgado Rosalia
Summary: Glycerol is commonly used for denitrification in wastewater treatment, but it is inefficient in non-acclimatized biomass. This study found that the acclimatization of biomass to glycerol is driven by the microbial enrichment of specific bacteria. However, this strategy leads to nitrite accumulation and unexpected nitrous oxide emissions.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Food Science & Technology
Yuzhao Ling, Hongyuan Tan, Lingwei Shen, Lingyun Wei, Guangquan Xiong, Lan Wang, Wenjin Wu, Yu Qiao
Summary: The effects of ozone water and ultrasound cleaning on the microbial community diversity of crayfish were studied through microbial viable count and 16S rRNA gene sequencing. The results showed that the combined treatment significantly reduced the viable count of various microorganisms. Sensory evaluation indicated that the crayfish treated with ozone water and ultrasound cleaning provided a satisfactory sensory experience.
Article
Microbiology
Yin Huang, Rashidin Abdugheni, Jinbiao Ma, Rui Wang, Lei Gao, Yonghong Liu, Wenjun Li, Man Cai, Li Li
Summary: A new species of Halomonas, named Halomonas flagellata sp. nov., was isolated from soil in Xinjiang, China. It is a motile bacterium with multiple flagella and shows high similarity to other Halomonas strains.
ARCHIVES OF MICROBIOLOGY
(2023)
Article
Multidisciplinary Sciences
Han Li, Ying Cui, Fei Wang, Jinghua Li, Dafu Wu, Jing Fan
Summary: In this experiment, the efficiency of nitrate nitrogen removal using different microbial inoculates varied among voltages in an electrochemical denitrification device. Low current (produced by the applied voltage) increased the diversity and richness of microorganisms, while the applied voltage significantly affected the abundance of specific microbial groups.
Article
Environmental Sciences
Tingxuan An, Xiaolan Lu, Yangchun Han, Chong Guo, Jingfeng Guo, Guorong Zhu, Wen Tian, Baoyi Lv
Summary: Accurate detection of bacterial communities in ballast water and sediments is crucial for risk management. This study utilized full-length 16S rRNA gene sequencing to investigate the bacterial communities, particularly focusing on identifying pathogens. The findings highlighted the significance of full-length sequencing in providing more accurate species diversity information. It was observed that there is a significant difference in bacterial communities between ballast water and sediments, despite both being dominated by the Proteobacteria phylum. Full-length sequencing identified 30 human and fish pathogens, whereas only five pathogens were detected through V3-V4 sequencing. Notably, emerging pathogens such as Citrobacter freundii and Nocardia nova, which are harmful to aquaculture and human health, were detected in the samples. In addition, several opportunistic pathogens were also identified. Overall, this study provides valuable insights into the bacterial communities in ballast water and sediments, emphasizing the necessity for rigorous management.
MARINE POLLUTION BULLETIN
(2023)
Article
Ecology
Antti J. Rissanen, Moritz Buck, Sari Peura
Summary: A putative novel methanotrophic genus, Candidatus Methylumidiphilus, was found to be ubiquitous and abundant in water columns of oxygen-stratified lakes and ponds in boreal and subarctic areas. However, it may have been missed in previous studies due to insufficient database coverage. By screening metagenome-assembled genomes (MAGs), researchers discovered two unique 16S rRNA gene sequences belonging to this genus, which could enhance its detection in environmental samples.
AQUATIC MICROBIAL ECOLOGY
(2022)
Article
Environmental Sciences
Sanni L. Aalto, Suvi Suurnakki, Mathis von Ahnen, Marja Tiirola, Per Bovbjerg Pedersen
Summary: Woodchip bioreactors are effective in removing nitrate from aquaculture effluents, with microbial communities including sulfate reducing bacteria (SRB) and sulfate oxidizing bacteria (SOB) playing crucial roles. The conditions within the bioreactors shape the microbial communities, with similar design and operational settings leading to similar functions. Autotrophic denitrifiers can significantly contribute to H2S consumption and nitrate removal in woodchip bioreactors, improving their overall environmental benefit.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Fisheries
Sanni L. Aalto, Elisavet Syropoulou, Kim Joao de Jesus Gregersen, Marja Tiirola, Per Bovbjerg Pedersen, Lars-Flemming Pedersen
Summary: This study examined the effects of ozone treatment and foam fractionation, alone and combined, on the microbiology of recirculating aquaculture systems (RAS) with rainbow trout. The results showed that foam fractionation had minimal effects on microbial abundance and overall community composition. In contrast, ozone treatment had a significant impact on microbial abundance and composition in both free-living and biofilm communities. Combining the two methods did not provide any additional benefits compared to ozone treatment alone. Additionally, foam fractionation led to changes in the nitrifying microbial community in the biofilm. Overall, the results suggest that these two water treatment methods have different mechanisms and may yield different outcomes under long-term application.
Article
Marine & Freshwater Biology
Helena Jantti, Tom Jilbert, Sanni L. Aalto, Asko Simojoki, Rahul Mangayil, Sari Peura, Antti J. Rissanen
Summary: Microbial processes play a vital role in nitrogen availability, greenhouse gas emissions, and trophic levels in lakes. This study investigated the impact of organic matter degradability and availability of ferrous iron on denitrification and dissimilatory nitrate reduction to ammonia (DNRA) rates in a boreal lake. Metagenomic sequencing revealed unique microbial taxa capable of both iron oxidation and nitrate reduction. The results highlight the spatial variability in microbial community and nitrous oxide emissions in boreal lake sediments.
Article
Environmental Sciences
Miikka B. Laine, Jussi S. Vesamaki, Veli-Mikko Puupponen, Marja Tiirola, Sami J. Taipale
Summary: This study focused on the effects of PFOA and PFHxA on a freshwater microbial community, revealing that high concentrations of both compounds altered the community structure and reduced microbial biovolume, while diversity remained unaffected. PFOA exhibited stronger toxicity towards the microbial community, causing significant structural changes and growth inhibition even at low concentrations.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Microbiology
Sami J. Taipale, Jussi Vesamaki, Petra Kautonen, Jussi V. K. Kukkonen, Christina Biasi, Riitta Nissinen, Marja Tiirola
Summary: Research has shown that the rate of plastic biodegradation and carbon disappearance varies in different freshwater environments. The biodegradation rate is significantly higher in humic-lake waters compared to clear-lake waters and artificial freshwater medium. Complete biodegradation of plastic can take anywhere from 100-200 years in humic-lake waters to potentially thousands of years in other water bodies. Additionally, specific types of bacteria play a key role in the degradation process.
ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Microbiology
Jussi S. Vesamaeki, Riitta Nissinen, Martin J. J. Kainz, Matthias Pilecky, Marja Tiirola, Sami J. J. Taipale
Summary: Microbial mineralization of organic compounds plays a crucial role in carbon cycling in food webs. In freshwater, the degradation rate of lignin, hemicellulose, and leaves is faster compared to microplastics. Bacteria are the main decomposers of all substrates, while fungal contribution is minimal.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Multidisciplinary Sciences
Helena A. K. Lapatto, Minna Kuusela, Aino Heikkinen, Maheswary Muniandy, Birgitta W. van der Kolk, Swetha Gopalakrishnan, Noora Pollanen, Martin Sandvik, Mark S. Schmidt, Sini Heinonen, Sina Saari, Juho Kuula, Antti Hakkarainen, Janne Tampio, Tuure Saarinen, Marja-Riitta Taskinen, Nina Lundbom, Per-Henrik Groop, Marja Tiirola, Pekka Katajisto, Marko Lehtonen, Charles Brenner, Jaakko Kaprio, Satu Pekkala, Miina Ollikainen, Kirsi H. Pietilainen, Eija Pirinen
Summary: Nicotinamide riboside (NR), a precursor of nicotinamide adenine dinucleotide (NAD(+)), has shown promise in improving obesity-associated mitochondrial dysfunction and metabolic syndrome. However, short-term clinical trials have not yielded positive results. This study aimed to investigate the long-term effects of NR supplementation on mitochondrial biogenesis and metabolic health in humans. The results showed that NR improved NAD(+) metabolism, muscle mitochondrial number, myoblast differentiation, gut microbiota composition, and epigenetic control of gene expression. However, it did not improve adiposity or metabolic health.
Article
Ecology
S. J. Taipale, C. Rigaud, M. L. Calderini, M. J. Kainz, M. Pilecky, S. Uusi-Heikkila, J. S. Vesamaki, K. Vuorio, M. Tiirola
Summary: This study examines the contribution of mixotrophic organisms and the fate of carbon in the food web using labeled materials. It finds that mixotrophic algae can upgrade simple fatty acids and contribute essential biomolecules to higher trophic levels.
Article
Chemistry, Multidisciplinary
Efstratios D. Sitsanidis, Lara A. L. Dutra, Johanna Schirmer, Romain Chevigny, Manu Lahtinen, Andreas Johansson, Carmen C. Piras, David K. Smith, Marja Tiirola, Mika Pettersson, Maija Nissinen
Summary: In this study, the Fmoc-F/GO hybrid hydrogel was formed by combining Fmoc-F amino acid with graphene oxide (GO) flakes for the first time. GO flakes did not affect Fmoc-F self-assembly but modulated the gel's elasticity and accelerated its formation. The hybrid hydrogel exhibited significant bactericidal activity against Gram-negative Escherichia coli (E. coli), but intermittent bacterial recovery due to the inoculum effect was observed.
Article
Environmental Sciences
Antti J. Rissanen, Paavo Ojanen, Leena Stenberg, Tuula Larmola, Jani Anttila, Sakari Tuominen, Kari Minkkinen, Markku Koskinen, Raisa Makipaa
Summary: The methane emissions from ditches in forestry-drained peatlands are currently estimated using an outdated method that does not consider the condition and age of the ditches. This study found that there are significant differences in emissions between moss-covered and moss-free ditches. By using more advanced emission factors, the estimated methane emissions from ditches in Finnish peatlands were found to be much lower than previously believed.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Environmental Sciences
Mikko Peltoniemi, Qian Li, Pauliina Turunen, Boris Tupek, Paivi Makiranta, Kersti Leppa, Mitro Muller, Antti J. Rissanen, Raija Laiho, Jani Anttila, Jyrki Jauhiainen, Markku Koskinen, Aleksi Lehtonen, Paavo Ojanen, Mari Pihlatie, Sakari Sarkkola, Elisa Vainio, Raisa Makibaa
Summary: Managed boreal peatlands are economically important, but they are a significant source of greenhouse gases. The emissions are related to soil water-table level, and selection harvesting has been suggested as a method to reduce net emissions while maintaining tree growth.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Ecology
Cyril Rigaud, Kimmo K. Kahilainen, Marco L. Calderini, Matthias Pilecky, Martin J. Kainz, Marja Tiirola, Sami J. Taipale
Summary: Long-chain polyunsaturated fatty acids (PUFA) are critical for reproduction and thermal adaptation in fish. In a study on European perch in a boreal lake, the expression of the fatty acid desaturase 2 (fads2) gene in the liver was found to vary with individual size, sex, and maturity, as well as the stable isotopes values and fatty acids content in their diet. The production of ARA and DHA, two important PUFA, was limited to the summer months, but perch required more of these fatty acids during winter when their muscle content was higher. The expression of fads2 in perch liver increased during winter, particularly in mature females, who stored DHA in their gonads even before the spawning season in spring. These findings suggest that perch can regulate the biosynthesis of physiologically required PUFA in response to stress or high energetic demand.
Article
Microbiology
Antti J. Rissanen, Tom Jilbert, Asko Simojoki, Rahul Mangayil, Sanni L. Aalto, Ramita Khanongnuch, Sari Peura, Helena Jantti
Summary: Eutrophication increases the input of labile organic matter into lake sediments, which affects the microbial community structure involved in methane production and consumption.
MICROBIOLOGY SPECTRUM
(2023)
Article
Microbiology
Ramita Khanongnuch, Rahul Mangayil, Ville Santala, Anne Grethe Hestnes, Mette Marianne Svenning, Antti J. Rissanen
Summary: This study explores the concept of utilizing methane-oxidizing bacteria to produce organic acids from methane and using them as feedstocks for heterotrophic bacteria. Experimental results show that the organic acid-rich spent media of methane-oxidizing bacteria can be used for 1-alkene production. However, further research and optimization are required.
FRONTIERS IN MICROBIOLOGY
(2022)
