Article
Environmental Sciences
Preeyaporn Pornkulwat, Eakalak Khan, Sorawit Powtongsook, Wuttichai Mhuantong, Chamorn Chawengkijwanich, Tawan Limpiyakorn
Summary: This study comprehensively investigated the impacts of ammonia and salinity on culturing nitrifying microorganisms and successfully formulated nitrifying cultures for different recirculating aquaculture system (RAS) types. The findings suggest that cultures prepared at low ammonia loading rates are most suitable for various RAS types, while cultures prepared at high ammonia loading rates are dominated by nitrifying microorganisms with low substrate affinity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Biodiversity Conservation
Weifang Hu, Mianrun Chen, Xue Lan, Guoliang Li, Bin Wang, Dong Yao Sun, Xianbiao Lin
Summary: This study found significant shifts in potential ammonia oxidation rates (PARs) and gene abundances of ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) along different salinity gradients. The PARs were higher under high salinity conditions, and the AOB gene abundance was greater than AOA under moderate and high salinity. This has important implications for nitrogen cycling in estuarine sediments.
ECOLOGICAL INDICATORS
(2022)
Article
Environmental Sciences
Shishi He, Zhirong Zhao, Zhichao Tian, Chi Xu, Yuan Liu, Da He, Yinghui Zhang, Maosheng Zheng
Summary: This study analyzed activated sludge samples from municipal and industrial wastewater treatment plants and found that comammox bacteria were more abundant than ammonia-oxidizing bacteria and ammonia-oxidizing archaea in municipal plants, while this trend did not hold true for industrial plants. Furthermore, a higher diversity of comammox bacteria was found in municipal samples. This study provides important insights into the abundance and diversity of comammox bacteria in municipal and refinery wastewater treatment systems.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Review
Fisheries
M. J. Jifiriya, P. G. Preena, V. J. Rejish Kumar, Amrutha J. Nair, Valsamma Joseph
Summary: The importance and diversity of archaea in aquaculture are often overlooked. Recent research has revealed the widespread presence of archaea in various aquaculture systems, where they play key roles in nitrogen cycling, sulfur cycling, and nutrition. Despite limitations and a lack of comprehensive information, archaea have great potential and future prospects in aquaculture.
AQUACULTURE INTERNATIONAL
(2023)
Article
Environmental Sciences
Xia Jia, Yunfeng Gao, Xiaodi Li, Yonghua Zhao, Lu Wang, Chunyan Zhang
Summary: This study investigated the impacts of elevated CO2 and cadmium levels on soil nitrification in the rhizosphere of Robinia pseudoacacia L. seedlings. The results showed that elevated CO2 combined with Cd pollution generally stimulated nitrification enzyme activities and influenced bacterial community structures.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Agronomy
Xingjia He, Sen Li, Fengzhi Wu
Summary: Intercropping has a significant impact on soil properties and microbial communities, with different intercropping systems affecting ammonia-oxidizing microorganisms differently in different seasons. Soil physicochemical state, PNR, AOA and AOB communities were significantly altered by intercropping, with seasonal variation playing a greater role in shaping the community structures.
Article
Soil Science
Haiyang Liu, Hangwei Hu, Xing Huang, Tida Ge, Yongfu Li, Zhenke Zhu, Xingmei Liu, Wenfeng Tan, Zhongjun Jia, Hongjie Di, Jianming Xu, Yong Li
Summary: Chemoautotrophic canonical ammonia-oxidizers play a significant role in autotrophic nitrification during the mineralization of organic substances with low C/N ratios in paddy soils, as shown by N-15 tracing and DNA-SIP techniques.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Article
Microbiology
Jonathan Rodriguez, Seemanti Chakrabarti, Eunkyung Choi, Nisreen Shehadeh, Samantha Sierra-Martinez, Jun Zhao, Willm Martens-Habbena
Summary: The discovery of ammonia-oxidizing archaea (AOA) and complete ammonia-oxidizing (comammox) bacteria in terrestrial ecosystems highlights their important role in nitrification. A nutrient-limited enrichment strategy was found to favor the growth of comammox bacteria with high affinity and yield. Direct enrichment from soil and nutrient-limited sub-cultivation consistently yielded high enrichments of Nitrosocosmicus-affiliated AOA associated with multiple canonical nitrite-oxidizing Nitrospira strains.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Soil Science
Shishi He, Yuanwei Li, Hongbin Mu, Zhirong Zhao, Jiawen Wang, Shufeng Liu, Zhenli Sun, Maosheng Zheng
Summary: This study highlights the important role of local ammonium concentration in affecting the ecological niche differentiation of comammox and canonical ammonia-oxidizing prokaryotes. The results show growth differences between CAOB and AOA, with CAOB favoring oligotrophic environments and being more tolerant to a broader range of ammonium concentrations.
APPLIED SOIL ECOLOGY
(2021)
Article
Soil Science
Yongxin Lin, Hang-Wei Hu, Guiping Ye, Jianbo Fan, Weixin Ding, Zi-Yang He, Yong Zheng, Ji-Zheng He
Summary: The meta-analysis of laboratory incubation studies with 1-octyne as the nitrification inhibitor shows that AOB play a more dominant role in soil nitrification in cropland than in wetland soils, indicating a major role of AOB in acidic soil nitrification. Moreover, the reduction of nitrification rate by 1-octyne is greater in soils incubated in slurry and with nitrogen additions, suggesting AOB's importance in nitrification in global acidic soils.
Article
Environmental Sciences
Xi Zhang, Ying Jiao, Bingxue Wang, Xintong Xu, Yubing Dong, Zhengqin Xiong
Summary: Soil nitrification, driven by ammonia-oxidizing microorganisms, is a crucial source of nitrous oxide (N2O) and nitric oxide (NO). Biochar amendment and climate warming can regulate soil nitrification, but their effects on different aged biochars and temperature combinations remain unclear.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Biotechnology & Applied Microbiology
Elizabeth French, Jessica A. Kozlowski, Annette Bollmann
Summary: The study found that ammonia-oxidizing archaea are more abundant in systems with low ammonium availabilities, while ammonia-oxidizing bacteria are more abundant when ammonium availability increases. Population dynamics of ammonia oxidizers may shift in response to changes in ammonium concentrations.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Soil Science
Zhen Zhen, Gaoyang Li, Yijie Chen, Ting Wei, Huijun Li, Fengcheng Huang, Yongxiang Huang, Lei Ren, Yanqiu Liang, Dayi Zhang, Zhong Lin, Zhe Li
Summary: Plantations of saline-alkali tolerant rice in coastal areas are proposed to improve rice yield and ensure food security. This study investigated the effects of saline-alkali tolerant rice cultivation on the nitrification process in coastal solonchaks. The results showed that the abundance and nitrification rates of AOA and AOB decreased with increasing salinity, but increased significantly in the rice rhizosphere. Saline-alkali tolerant rice cultivation enhanced the nitrification process of the soil by increasing the nitrification contribution of AOB.
APPLIED SOIL ECOLOGY
(2023)
Article
Environmental Sciences
Jing Chen, Shuo Zhao, Yating Gan, Jing Wu, Jingcheng Dai, Dazhong Yan
Summary: DDT contamination inhibits soil ammonia oxidation, but it recovers over time. DDT affects the diversity and community composition of ammonia-oxidizing archaea, but has no significant effect on ammonia-oxidizing bacteria.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Ting Lan, Yuxiao Huang, Xi Song, Ouping Deng, Wei Zhou, Ling Luo, Xiaoyan Tang, Jian Zeng, Guangdeng Chen, Xuesong Gao
Summary: Nitrogen management measures such as urease inhibitors, synthetic nitrification inhibitors, and biochar are commonly used in agriculture to mitigate nitrogen loss and increase fertilizer recovery efficiency. In a study conducted on calcareous soil under rice cropping, it was found that a combination of BNIs and UIs had the most effective results in reducing nitrogen loss and improving FRE by utilizing synergistic effects.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
P. G. Preena, V. J. R. Kumar, C. Achuthan, R. George, R. Boobal, R. R. Nair, I. S. B. Singh
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2018)
Article
Engineering, Environmental
P. G. Preena, Cini Achuthan, V. J. Rejish Kumar, R. Boobal, G. D. Deepa, Jayesh Puthumana, Sunitha Poulose, I. S. Surekhamol, I. S. Bright Singh
WATER SCIENCE AND TECHNOLOGY
(2019)
Article
Fisheries
A. Anju, C. K. Smitha, K. Preetha, R. Boobal, Philip Rosamma
FISH & SHELLFISH IMMUNOLOGY
(2019)
Article
Environmental Sciences
Ramya Ramankutty Nair, Boobal Rangaswamy, Bright Singh Isaac Sarojini, Valsamma Joseph
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Environmental Sciences
Boobal Rangaswamy, Chang Woo Ji, Won-Seok Kim, Jae-Won Park, Yong Jun Kim, Ihn-Sil Kwak
Summary: This study analyzed the dietary composition of Polypedilum larvae in two different habitats using eDNA metabarcoding. The results showed that Chlorophyta was the most abundant food source for the larvae, while the proportions of fungi, protozoa, and zooplankton varied between habitats. The study also revealed a relationship between environmental factors and food contents.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Biotechnology & Applied Microbiology
Boobal Rangaswamy, Ramya Ramankutty Nair, Cini Achuthan, Bright Singh Isaac Sarojini