Article
Environmental Sciences
E. Slavin, D. J. Wain, L. D. Bryant, M. Amani, R. G. Perkins, C. Blenkinsopp, S. Simoncelli, S. Hurley
Summary: Top-down surface mixers are effective in preventing stratification, controlling cyanobacteria, and limiting sediment release of soluble manganese in drinking water reservoirs. However, their limited range of influence leaves a majority of the reservoir exposed to potential issues such as stratification, anoxia, and internal loading of inorganic nutrients and metals.
WATER RESOURCES RESEARCH
(2022)
Article
Biodiversity Conservation
Xianting He, Min Chen, Luxin Zhou, Wenyan He, Ning Liao, Youcai Tuo
Summary: This study analyzed bacterial communities in a seasonally stratified reservoir before and after the flood season and found significant changes in community structure and dominant genera. After the flood season, aerobic denitrifying bacteria with strong denitrification ability became dominant.
Article
Limnology
Stefanos Moschos, Odysseas Piperagkas, Hera Karayanni
Summary: The study examined the composition and variations of bacterial community in sediment of Lake Pamvotis, revealing a diverse and homogenous bacterial community composition primarily dominated by Proteobacteria, Bacteroidetes, and Chloroflexi. Certain anaerobic/microaerobic taxa common in polluted aquatic systems were found to significantly influence the bacterial community composition in the lake sediment.
Article
Environmental Sciences
Kun Lv, Xiaojuan Guo, Congfeng Wang, Qingqing Su, Defu Liu, Shangbin Xiao, Zhengjian Yang
Summary: Nitrogen pollution in reservoir ecosystems is a serious environmental issue, and microbial-mediated nitrogen cycling in sediments plays a critical role in nitrogen removal. Enhancing sediment denitrification and replenishing dissolved oxygen and nitrate is expected to strengthen the environmental self-purification process in aquatic ecosystems.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Xianfang Fan, Xigang Xing, Shiming Ding
Summary: Microbial activity can enhance phosphorus sequestration in sediments, with Fe or S oxidation playing a crucial role. Sterilization reduces the sediment's capacity to immobilize P, with a critical depth layer of 0-10 mm. Inoculation or sterilization significantly alters bacterial community structure and identified key bacterial genera responsible for P retention in sediments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Huanjun Zhang, Liu Yang, Yi Li, Chao Wang, Wenlong Zhang, Longfei Wang, Lihua Niu
Summary: The study reveals that severe pollution reduces microbial diversity and network complexity, potentially leading to community instability. Competition for nutrients among copiotrophic bacteria may be enhanced as pollution levels increase. Unique keystone taxa in the severe pollution group may contribute to photosynthesis and pollutant degradation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Gabrielle Maria Fonseca Pierangeli, Karine Mirelle Rodrigues da Silva, Lucia Helena Gomes Coelho, Roseli Frederigi Benassi, Mercia Regina Domingues, Gustavo Bueno Gregoracci
Summary: We examined the impact of metals and physicochemical variables on the microbes and their metabolisms in the sediments of Guarapiranga reservoir in Brazil. The metals cadmium, copper, and chromium had minimal effects on the structure, composition, and richness of sediment microbial communities and functions. However, when combined with physicochemical properties, such as sediment carbon and sulfur, bottom water electrical conductivity, and water column depth, metals had increased effects on the microbiota. Anthropogenic activities contribute to the spatial increase of these parameters and metals in the reservoir. Microbes found in metal-contaminated sites showed potential metal resistance or bioremediation abilities. The knowledge gained from studying the sediment microbiota and metabolisms in this freshwater reservoir impacted by human activities provides insights into their potential for metal bioremediation in similar environments.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Han Gao, Juan Chen, Chao Wang, Peifang Wang, Rong Wang, Bingbing Feng
Summary: The contamination of polybrominated diphenyl ethers in sediments poses a serious threat to human health and ecological safety. This study examined the effects of decabromodiphenyl ether (BDE-209) and Hydrilla verticillata on sediment bacterial communities and functions. The results showed that BDE-209 significantly inhibited bacterial diversity and metabolic functions in the sediments. Planting H. verticillata effectively alleviated the adverse impacts of BDE-209 by reducing its residuals, increasing organic carbon, and modifying metabolic profiles.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Yu Yao, Jiaqi Zhao, Lingzhan Miao, Jun Hou
Summary: This study explores the effects of physical and chemical factors and heavy metals on microbial diversity, community structure, and functions of bacterial and fungal communities in a black-odorous river in Wuhu, China. The results show that urbanization has led to eutrophication in river ecosystems, with heavy metals frequently observed. The influence of physical and chemical factors and heavy metals on microbial variation varies between bacterial and fungal communities.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Environmental
Congcong Jiao, Dayong Zhao, Tianxu Zhou, Qinglong L. Wu, Jin Zeng
Summary: Phytoplankton blooms are important indicators of eutrophication, and their impact on bacterial communities in freshwater lakes is not well understood. This study investigated the dynamics of bacterial communities in both water and sediment samples during a complete period of phytoplankton blooms in a subtropical eutrophic lake. The results showed that phytoplankton blooms significantly altered the diversity, composition, and coexistence patterns of both planktonic and sediment bacterial communities. The successional patterns of bacterial communities differed between the planktonic and sediment environments.
Article
Biotechnology & Applied Microbiology
Dongwei Hou, Renjun Zhou, Shenzheng Zeng, Dongdong Wei, Xisha Deng, Chengguang Xing, Shaoping Weng, Jianguo He, Zhijian Huang
Summary: The research revealed that bacterial communities in shrimp pond sediments exhibit high diversity, with core bacterial communities closely related to the physicochemical properties of sediments. At the mesoscale level, the bacterial communities in shrimp pond sediments are driven by stochastic processes.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2021)
Editorial Material
Microbiology
Andrea Du Toit
Summary: This study reveals that Acinetobacter baumannii forms intracellular reservoirs in the bladder, which can lead to recurrent infections after catheterization.
NATURE REVIEWS MICROBIOLOGY
(2023)
Article
Ecology
Junwei Zhu, Yifan Ma, Lingfeng Huang, Wenjing Zhang
Summary: This study revealed the seasonal influence of eutrophication on bacterial community diversity in a coastal bay. The seasonal variation in composition and structure of bacterial communities had a greater impact than vertical variability. Homogeneous selection in community assembly processes was affected by seasonal environmental differences. The bacterial community was the most complex in summer, with a unique composition and intricate assembly process.
ECOLOGICAL PROCESSES
(2022)
Article
Environmental Sciences
Daniely de Lucena-Silva, Juliana dos Santos Severiano, Ranielle Daiana dos Santos Silva, Vanessa Becker, Jose Etham de Lucena Barbosa, Joeline Molozi
Summary: The Floc and Sink technique effectively removes phosphorus and algal biomass from the water column through the application of coagulants and clays. However, little is known about its impacts on other phytoplankton species and the response of species with mechanisms of resistance to sedimentation. A laboratory experiment was conducted in this study to assess the impact of different coagulants and clays on the phytoplankton community. The results showed that aluminum-based coagulants and chitosan were effective in sedimenting cells, but species with aerotopes and flagella were resistant to sedimentation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Xiaoying Zhang, Tianshan Lan, Hongchen Jiang, Kexin Ye, Zhenxue Dai
Summary: This study evaluated the bacterial communities and their driven nitrogen cycling potential in sediments along the intertidal zone of Daya Bay, China. The results revealed the dominant nitrogen transformation processes at different tide levels and demonstrated the significant impact of environmental factors on the composition of bacterial communities. pH, salinity, and C/N ratio were identified as important factors shaping the bacterial community composition.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)