Results 71 to 80 of about 5,499 (152)

Vertical segregation and phylogenetic characterization of ammonia-oxidizing bacteria and archaea in the sediment of a freshwater aquaculture pond

Frontiers in Microbiology, 2016
Pond aquaculture is the major freshwater aquaculture method in China. Ammonia-oxidizing communities inhabiting pond sediments play an important role in controlling culture water quality.
Shimin eLu, Shimin eLu, Xingguo eLiu, Qigen eLiu, Zhuojun eMa, Zongfan eWu, Zongfan eWu, Xianlei eZeng, Xianlei eZeng, Xu eShi, Zhaojun eGu   +10 more
doaj   +1 more source

Diversity and abundance of ammonia-oxidizing archaea in the Dongjiang River, China

Microbiological Research, 2011
Nitrification in aquatic ecosystems plays a crucial role in the global nitrogen cycling. It has been widely accepted that ammonia-oxidizing bacteria (AOB) are responsible for nitrification. However, this concept is currently challenged by the ubiquity of ammonia-oxidizing archaea (AOA) in various environments, such as in aquatic and terrestrial ...
Liu, Zhenghui, Huang, Shaobin, Sun, Guoping, Xu, Zhencheng, Xu, Meiying   +4 more
openaire   +2 more sources

Benthic Ammonia Oxidizers Differ in Community Structure and Biogeochemical Potential Across a Riverine Delta

Frontiers in Microbiology, 2015
Nitrogen pollution in coastal zones is a widespread issue, particularly in ecosystems with urban or agricultural watersheds. California’s Sacramento-San Joaquin Delta, at the landward reaches of San Francisco Bay, is highly impacted by both agricultural ...
Julian eDamashek, Jason Michel Smith, Jason Michel Smith, Annika eMosier, Annika eMosier, Christopher eFrancis   +5 more
doaj   +1 more source

Effect of Nicotine on Soil Microbiota and Nitrification in a Microcosm Experiment

Agronomy
Tobacco cultivation leads to nicotine accumulation in soil, but how nicotine affects soil nitrification and ammonia-oxidizing microorganisms remains poorly understood.
Lin Zhang, Qing X. Li, Guitong Li
doaj   +1 more source

Ammonia-Oxidizing Archaea Dominate Ammonia-Oxidizing Communities within Alkaline Cave Sediments

Geomicrobiology Journal, 2016
Nitrification represents one of the key steps in the global nitrogen cycle. While originally considered an exclusive metabolic capability of bacteria, the identification of the Thaumarchaeota revealed that ammonia-oxidizing archaea (AOA) are also important contributors to this process, particularly in acidic environments.
Zhao, Rui, Hongmei Wang, Yang, Huan, Yun, Yuan, Barton, Hazel A.   +4 more
openaire   +1 more source

Nitrifier Gene Abundance and Diversity in Sediments Impacted by Acid Mine Drainage

Frontiers in Microbiology, 2017
Extremely acidic and metal-rich acid mine drainage (AMD) waters can have severe toxicological effects on aquatic ecosystems. AMD has been shown to completely halt nitrification, which plays an important role in transferring nitrogen to higher organisms ...
Bhargavi Ramanathan, Andrew M. Boddicker, Timberley M. Roane, Annika C. Mosier   +3 more
doaj   +1 more source

Response of Nitrification and Crop Yield to the Presence of NBPT and DCD in a Wheat-Corn Double Cropping System

Agronomy
The excessive application of nitrogen fertilizer aggravated the loss of nitrogen in farmland and exerted detrimental effects on the soil and water environment. Examining the effects of N-(n-Butyl)thiophosphoric triamide (NBPT) and nitrification inhibitor
Zhaoqi Qu, Xuejing Xia, Dan Liu, Huimin Dong, Tingliang Pan, Haojie Feng, Yanhong Lou, Hui Wang, Quangang Yang, Zhongchen Yang, Hong Pan, Yuping Zhuge   +11 more
doaj   +1 more source

Molecular ecology of ammonia oxidizing archaea and bacteria

, 2015
The newly recognized ammonia-oxidizing archaea (AOA) makes re-evaluation of the contribution to ammonia oxidization by both AOA and ammonia-oxidizing bacteria (AOB) necessary and meaningful. The growing population and increasing anthropogenic activities around coastlines have affected wetland and coastal marine ecosystems through discharging polluted ...
openaire   +2 more sources

Comammox Nitrospira abundance and contribution to nitrification in a forested landscape

Ecosphere
Nitrification in terrestrial ecosystems is mediated by NH4+‐oxidizing bacteria (AOB) and archaea (AOA). Presently, we understand relatively little about how physiological capacities and environmental tolerances influence their community composition, and ...
Donald R. Zak, Rima A. Upchurch
doaj   +1 more source

The hidden potential of archaea in carbon and nitrogen cycling in agricultural soils: a review

Frontiers in Microbiology
The soil microbiome drives soil nutrient cycling and is intrinsically linked to plant productivity in agriculture. Archaea are members of many soil microbiomes and play important roles in nutrient cycling, particularly in the carbon and nitrogen cycle ...
Brenda M. Speek, Brenda M. Speek, Brenda M. Speek, Afnan Khalil Ahmad Suleiman, Eline Keuning, Valentina Sechi, Cees J. N. Buisman, Cees J. N. Buisman, T. Martijn Bezemer, T. Martijn Bezemer   +9 more
doaj   +1 more source