Results 41 to 50 of about 2,961 (133)

Iron/Manganese Oxide‐Bound Nitrogen Suppresses Microbial Mediated Nitrate Reduction in Soil

Land Degradation &Development, Volume 37, Issue 15, Page 10784-10794, September 2026.
ABSTRACT Nitrogen cycling plays a pivotal role in sustaining ecosystem productivity and stability, while the chemical forms of nitrogen in soils critically influence both its efficiency and pathways. In this study, farmland soils from the Anning River Basin—an important watershed in Southwest China—were investigated to examine the regulatory effects of
Yu Cheng, Xuehao Zheng, Miao Yang, Shoujiang Liu   +3 more
wiley   +1 more source

Sedimentary lycopane/n‐C31 ratio as a proxy for bottom water hypoxia in coastal ocean

Limnology and Oceanography Letters, Volume 11, Issue 5, September 2026.
Abstract Bottom‐water hypoxia on continental shelves is intensifying under climate change and eutrophication, yet long‐term records remain scarce. Here we show that the sedimentary lycopane/n‐C31 ratio reliably records bottom‐water oxygenation in the seasonally hypoxic Yangtze River Estuary.
Qingnan Song, Huamao Yuan, Jinming Song, Guiling Zhang, Fengmin Pan, Xuegang Li, Liqin Duan   +6 more
wiley   +1 more source

Comparison of water availability effect on ammonia-oxidizing bacteria and archaea in microcosms of a Chilean semiarid soil

Frontiers in Microbiology, 2012
Water availability is the main limiting factor in arid soils; however few studies have examined the effects of drying and rewetting on nitrifiers from these environments.
Mauricio eBustamante, Valentina eVerdejo, Catalina eZúñiga, Fernanda eEspinosa, Julieta eOrlando, Margarita eCarú   +5 more
doaj   +1 more source

Comparative Microbial Nitrogen Functional Gene Abundances in the Topsoil vs. Subsoil of Three Grassland Habitats in Northern China

Frontiers in Plant Science, 2022
The microbial groups of nitrogen fixers, ammonia oxidizers, and denitrifiers play vital roles in driving the nitrogen cycle in grassland ecosystems. However, the understanding of the abundance and distribution of these functional microorganisms as well ...
Yuqing Liu, Yuqing Liu, Yuqing Liu, Qiaodong Chi, Hui Cheng, Huanxin Ding, Teng Wen, Jun Zhao, Jun Zhao, Jun Zhao, Xiaojuan Feng, Jinbo Zhang, Jinbo Zhang, Jinbo Zhang, Zucong Cai, Zucong Cai, Zucong Cai, Guohua Liu   +17 more
doaj   +1 more source

Serpentine Biocrust Microbes Maintain Nitrogen Cycling Under Drought and Heavy Metal Stress

Ecological Research, Volume 41, Issue 5, September 2026.
This study highlights the complex interplay between soil geochemistry and moisture availability in shaping microbial communities within wetter and drier serpentine and non‐serpentine biological soil crusts. It demonstrates that both factors influence the structure of nitrogen‐cycling microbial communities and the processes they mediate.
Sandra Barnard, Oluwatobi Barachiah, Stefan J. Siebert, Danielle Botha, Sarina Claassens   +4 more
wiley   +1 more source

Impacts of Cu and sulfadiazine on soil potential nitrification and diversity of ammonia-oxidizing archaea and bacteria

Environmental Pollutants & Bioavailability, 2019
Soil potential nitrification rate (PNR) and diversity of ammonia-oxidizing microbes were investigated in spiked soils with Cu and Sulfadiazine (SDZ). An obvious decrease of PNR was observed with the increase of Cu and SDZ concentrations in the soil. Real-
Qiang Liao, Mingzhu Li, Yuanpeng Dong, Mi Wu, Zilin Meng, Qian Zhang, Aiju Liu   +6 more
doaj   +1 more source

Aquifer Microbial Communities Differentially Display Metabolisms Capable of Secondary Effects on Uranium Speciation Across a Former Metal Processing Site

Environmental Microbiology, Volume 28, Issue 9, September 2026.
We performed microbial membership and metabolism measurements across a uranium‐contaminated site's surface and ground waters, then performed analyses relating these metrics to geochemistry at the site. Findings showed variations in the membership, yet mainly similar functional capabilities.
Catherine J. Pettinger, Allondra M. Woods, Raymond H. Johnson, Charles J. Paradis, Erica L.‐W. Majumder   +4 more
wiley   +1 more source

Small-scale variation of ammonia oxidisers within intertidal sediments dominated by ammonia-oxidising bacteria Nitrosomonas sp. amoA genes and transcripts

Scientific Reports, 2017
While numerous studies have investigated the abundance of ammonia oxidising bacteria and archaea (AOB/AOA) via the ammonia monooxygenase gene amoA, less is known about their small-scale variation and if amoA gene abundance equates to activity.
Aoife M. Duff, Li-Mei Zhang, Cindy J. Smith   +2 more
doaj   +1 more source

Purple Sulfur Bacteria Dominate Microbial Community in Brazilian Limestone Cave

Microorganisms, 2019
The mineralogical composition of caves makes the environment ideal for inhabitation by microbes. However, the bacterial diversity in the cave ecosystem remains largely unexplored.
Eric L. S. Marques, João C. T. Dias, Eduardo Gross, Adriana B. de Cerqueira e Silva, Suzana R. de Moura, Rachel P. Rezende   +5 more
doaj   +1 more source

Environmental Factors, More Than Spatial Distance, Explain Community Structure of Soil Ammonia-Oxidizers in Wetlands on the Qinghai–Tibetan Plateau

Microorganisms, 2020
In wetland ecosystems, ammonia oxidation highly depends on the activity of ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB), which are, therefore, important for studying nitrogen cycling.
Wen Zhou, Xiaoliang Jiang, Jian Ouyang, Bei Lu, Wenzhi Liu, Guihua Liu   +5 more
doaj   +1 more source