Z Allg Mikrobiol
Published: September 1972
Environ Microbiol Rep
April 2025
Department of Biology, Arctic Research Center, Aarhus University, Aarhus, Denmark.
The Arctic is warming faster than the global average, making it critical to understand how this affects ecological structure and function in streams, which are key Arctic ecosystems. Microbial biofilms are crucial for primary production and decomposition in Arctic streams and support higher trophic levels. However, comprehensive studies across Arctic regions, and in particular within Greenland, are scarce.
View Article and Find Full Text PDFMicrobes Environ
March 2025
Faculty of Science, Kagoshima University.
Frankia spp. are multicellular actinobacteria with the ability to fix atmospheric dinitrogen (N). Frankia fixes N not only in the free-living state, but also in root-nodule symbioses with more than 200 plant species called actinorhizal plants.
View Article and Find Full Text PDFPLoS One
March 2025
Aix-Marseille Université, Université du Sud Toulon-Var, CNRS/INSU, IRD, MIO, UM 110, Marseille, France.
A novel thermophilic (optimum growth temperature ~ 60 °C) anaerobic Gram-negative bacterium, designated strain V6Fe1T, was isolated from sediments heated by the hydrothermal circulation of the Aeolian Islands (Vulcano, Italy) on the seafloor. Strain V6Fe1T belongs to the recently described family Deferrivibrionaceae in the phylum Deferribacterota. It grows chemoorganotrophically by fermentation of proteinaceous substrates and organic acids or by respiration of organic compounds using fumarate, nitrate, Fe(III), S°, and Mn(IV) as electron acceptors.
View Article and Find Full Text PDFEcology
March 2025
Marine Science Institute, University of California, Santa Barbara, California, USA.
Structure-forming foundation species facilitate consumers by providing habitat and refugia. In return, consumers can benefit foundation species by reducing top-down pressures and increasing the supply of nutrients. Consumer-mediated nutrient dynamics (CND) fuel the growth of autotrophic foundation species and generate more habitat for consumers, forming reciprocal feedbacks.
View Article and Find Full Text PDFEnviron Microbiol
March 2025
Department of Earth System Science, Stanford University, Stanford, California, USA.
Diazotrophic microorganisms alleviate nitrogen limitation at marine cold seeps using nitrogenase, encoded in part by the gene nifH. Here, we investigated nifH-containing organisms (NCOs) inside and outside six biogeochemically heterogeneous seeps using amplicon sequencing and quantitative real-time PCR (qPCR) of nifH genes and transcripts. We detected nifH genes affiliated with phylogenetically and metabolically diverse organisms spanning 18 bacterial and archaeal phyla (17 within seeps).
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