Michael Wagner

This study examines how thermal stress affects microbial symbiosis and host activity in the sponge Ianthella basta, showing tissue regression, symbiont loss, and microbial shifts under elevated temperatures.

The paper identifies a novel Saccharimonadia genus associated with a polyphosphate-accumulating bacterium in wastewater treatment plants and explores their ecological and metabolic interactions.

The paper introduces improved 16S rRNA V4 primers that enhance detection of underrepresented microbial lineages across diverse environments.

This study shows that Nitrobacter can adjust its nitrite affinity based on nitrite concentration and pH, demonstrating adaptive plasticity in cNXR NOB.

This study characterizes the growth of Nitrobacter strain NHB1 under acidic conditions and shows its role in enhancing ammonia oxidation by acidophilic archaea in co-culture.

Microflora Danica compiles 10,686 shotgun metagenomes and 449 rRNA datasets to create an atlas of Danish environmental microbiomes, revealing hidden homogeneity and novel nitrifiers.

This study shows heatwave conditions alter active nitrifying communities and their viruses in tidal flats and agricultural soils, affecting nutrient cycling.

This study shows that ammonia oxidizers contribute only a small fraction to dark ocean DIC fixation, challenging the assumption that nitrification primarily sustains carbon fixation in the deep ocean.

This study shows sponge-associated ammonia-oxidizing archaea use branched-chain amino acids as a carbon and nitrogen source, revealing a mixotrophic lifestyle and a new nutritional interaction in sponge holobionts.

This study shows hypoosmolarity inhibits archaeal ammonia oxidation while promoting bacterial ammonia oxidation in different environments.

The paper identifies Candidatus Nitrosocosmicus as dominant ammonia-oxidizing archaea in rhizospheres of pepper and ginseng, showing their MnKat gene abundance and catalytic activity.

The paper predicts secreted proteomes of activated sludge microorganisms to identify nutrient niches, finding distinct enzyme profiles among microbial taxa.

This study shows that two acidophilic methanotrophs can respire N2O and grow anaerobically, expanding their ecological niche and offering potential for greenhouse gas mitigation.

This study identifies two novel nitrifying symbiont lineages in marine sponges, showing vertical transmission and suggesting their role in nitrogen cycling.

Cyanate is a small but continuously available nitrogen source for soil microbes, contributing to a selective advantage of microorganisms capable of direct cyanate utilization.