Results 51 to 60 of about 5,341 (161)

Linking Abundance and Activity of Ammonia‐Oxidising Bacteria and Archaea in an Agriculturally Impacted First‐Order Stream

Environmental Microbiology, Volume 28, Issue 7, July 2026.
Ammonia‐oxidising archaea (AOA) and bacteria (AOB) coexist in streambed sediments, but their contributions to nitrification remain unresolved. Using field sampling, sequencing, qPCR, microcosm incubations and modelling, we show that AOB dominated nitrification in streambed sediments despite lower abundance, emphasizing the importance of distinguishing ...
Zhe Wang, Anna Störiko, Aileen Jung, Daniel Straub, Olaf A. Cirpka, Holger Pagel, Tillmann Lueders   +6 more
wiley   +1 more source

Heterotrophic Thaumarchaea with Small Genomes Are Widespread in the Dark Ocean

mSystems, 2020
The Thaumarchaeota is a diverse archaeal phylum comprising numerous lineages that play key roles in global biogeochemical cycling, particularly in the ocean.
Frank O. Aylward, Alyson E. Santoro
doaj   +3 more sources

Substrate pulses as a selection factor for clades of marine Thaumarchaeota

, 2023
Abstract Oxidation rates of N supplied as ammonium (AO) or urea (UO) by Thaumarchaeota-dominated nitrifying communities in samples of aerobic waters from continental shelf and slope waters of the Southern Ocean west of the Antarctic Peninsula were inhibited by substrate amendments in the low nM range.
James Hollibaugh, Julian Damashek, Hugh Ducklow, Brian Popp, Natalie Wallsgrove   +4 more
openaire   +1 more source

Cultivation of Electrogens With Cost‐Effective Membrane‐Less Bioreactor Designs

Fuel Cells, Volume 26, Issue 3, June 2026.
ABSTRACT Rational improvements in bioreactor design for scaling up power generation in microbial fuel cells (MFCs) are discussed in this study. The potential of autoclavable MFCs for isolating electroactive bacteria that produce sustainable electricity is being investigated.
Aswathi Mahesh, Ganesh Mahidhara
wiley   +1 more source

The large-scale distribution of ammonia oxidizers in paddy soils is driven by soil pH, geographic distance and climatic factors

Frontiers in Microbiology, 2015
Paddy soils distribute widely from temperate to tropical regions, and are characterized by intensive nitrogen fertilization practices in China. Mounting evidence has confirmed the functional importance of ammonia-oxidizing archaea (AOA) and bacteria (AOB)
Hangwei eHu, Hangwei eHu, Li-mei eZhang, Chaolei eYuan, Yong eZheng, Juntao eWang, Deli eChen, Jim eHe   +7 more
doaj   +1 more source

Functional Metagenomics Insights Into the Allium ampeloprasum Rhizosphere Microbiome Under Different Fertilization Regimes

MicrobiologyOpen, Volume 15, Issue 3, June 2026.
Shotgun metagenomic sequencing was used to characterize the functional potential of the Allium ampeloprasum rhizosphere microbiome under chemical fertilizer (G1), biofertilizer (G2), and unfertilized (Bulk) soil (G3) management practices. This study revealed that different fertilization regimes altered microbial functional profiles.
Oluwaseun Emmanuel Shittu, Ben Jesuorsemwen Enagbonma, Olubukola Oluranti Babalola   +2 more
wiley   +1 more source

Oxidation of urea‐derived nitrogen by thaumarchaeota‐dominated marine nitrifying communities [PDF]

Environmental Microbiology, 2016
Summary Urea nitrogen has been proposed to contribute significantly to nitrification by marine thaumarchaeotes. These inferences are based on distributions of thaumarchaeote urease genes rather than activity measurements. We found that ammonia oxidation rates were always higher than oxidation rates of urea‐derived
Bradley B, Tolar, Natalie J, Wallsgrove, Brian N, Popp, James T, Hollibaugh   +3 more
openaire   +2 more sources

Deglacial Permafrost Organic Carbon Delivery at the Northern Svalbard Continental Margin: Insights From Tetraether Lipids and Plant Biomarkers

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 6, June 2026.
Abstract Degradation of Arctic permafrost due to global warming and sea level rise could trigger positive feedbacks, exacerbating climate change. However, uncertainties remain on how permafrost systems may respond because we lack a complete understanding of the permafrost‐climate feedback.
Mathia Sabino, Alessio Nogarotto, Riko Noormets, Teena Chauhan, Gesine Mollenhauer, Jens Hefter, Tommaso Tesi   +6 more
wiley   +1 more source

The Role of Heterotrophic Bacteria and Archaea in the Transformation of Lignin in the Open Ocean

Frontiers in Marine Science, 2019
The pelagic ocean receives terrigenous inputs of a range of organic compounds; however, the role that this terrigenous material plays in the ocean carbon cycle and biological pump is not entirely understood, and questions remain as to how oceanic cycles ...
Natasha McDonald, Natasha McDonald, Eric P. Achterberg, Craig A. Carlson, Martha Gledhill, Shuting Liu, Julia R. Matheson-Barker, Norm B. Nelson, Rachel J. Parsons   +8 more
doaj   +1 more source

Changes in DOM Quality Determine Prokaryotic Activities and Extracellular Release in the NW Mediterranean Sea: An Experimental Approach

Environmental Microbiology Reports, Volume 18, Issue 3, June 2026.
Changes in DOM composition influence prokaryotic species growth in the Mediterranean Sea, shaping their metabolic responses and organic matter processing. In our study, higher DOP consumption and alkaline phosphatase activity led to the accumulation of recalcitrant DOM, highlighting how microbial community shifts drive distinct pathways in carbon ...
Eva Ortega‐Retuerta, Nawal Bouchachi, Rebeca Campos, Olivier Crispi, Barbara Marie, Charles‐Hubert Paulin, Karine Escoubeyrou, Jonathan Colombet, Telesphore Sime‐Ngando, Anabel Von Jackowski   +9 more
wiley   +1 more source