Nitrogen cycling during an Arctic bloom: from chemolithotrophy to nitrogen assimilation DOI Creative Commons
Rafael Laso-Pèrez, Juan Rivas-Santisteban, Nuria Fernández‐González

et al.

mBio, Journal Year: 2025, Volume and Issue: unknown

Published: May 12, 2025

ABSTRACT In the Arctic, phytoplankton blooms are recurring phenomena occurring during spring-summer seasons and influenced by strong polar seasonality. Bloom dynamics affected nutrient availability, especially nitrogen, which is main limiting in Arctic. This study aimed to investigate changes an Arctic microbial community using omics approaches a bloom focusing on nitrogen cycle. Using metagenomic metatranscriptomic samples from Dease Strait (Canada) March July (2014), we reconstructed 176 metagenome-assembled genomes. Bacteria dominated community, although archaea reached up 25% of abundance early spring, when Nitrososphaeria actively expressed genes associated with ammonia oxidation nitrite ( amt, amo, nirK ). The resulting was presumably further oxidized nitrate Nitrospinota bacterium that highly oxidoreductase gene nxr Since May, constant increase chlorophyll indicated occurrence bloom, promoting successive proliferation different groups chemoorganotrophic bacteria Bacteroidota, Alphaproteobacteria, Gammaproteobacteria These showed strategies obtain whether it be organic or inorganic sources, according expression patterns encoding transporters for compounds. contrast, summer, chemolithotrophic organisms thriving winter reduced their relative catabolic genes. Based our functional analysis, see transition where nitrogen-based chemolitotrophy plays relevant role based carbohydrates released seem specialize sources. IMPORTANCE one environments most anthropogenic climate change. It expected rise temperature change ice cover will impact marine communities biogeochemical cycles. this regard, blooms. study, combine genetic data cycle at level over time series covering July. Our results indicate importance taxa (from bacteria) processes chemolithoautotrophy incorporation sources) cycling period. provides baseline future research should include additional methodologies like analysis fully understand these due global

Language: Английский

Nitrogen cycling during an Arctic bloom: from chemolithotrophy to nitrogen assimilation DOI Creative Commons
Rafael Laso-Pèrez, Juan Rivas-Santisteban, Nuria Fernández‐González

et al.

mBio, Journal Year: 2025, Volume and Issue: unknown

Published: May 12, 2025

ABSTRACT In the Arctic, phytoplankton blooms are recurring phenomena occurring during spring-summer seasons and influenced by strong polar seasonality. Bloom dynamics affected nutrient availability, especially nitrogen, which is main limiting in Arctic. This study aimed to investigate changes an Arctic microbial community using omics approaches a bloom focusing on nitrogen cycle. Using metagenomic metatranscriptomic samples from Dease Strait (Canada) March July (2014), we reconstructed 176 metagenome-assembled genomes. Bacteria dominated community, although archaea reached up 25% of abundance early spring, when Nitrososphaeria actively expressed genes associated with ammonia oxidation nitrite ( amt, amo, nirK ). The resulting was presumably further oxidized nitrate Nitrospinota bacterium that highly oxidoreductase gene nxr Since May, constant increase chlorophyll indicated occurrence bloom, promoting successive proliferation different groups chemoorganotrophic bacteria Bacteroidota, Alphaproteobacteria, Gammaproteobacteria These showed strategies obtain whether it be organic or inorganic sources, according expression patterns encoding transporters for compounds. contrast, summer, chemolithotrophic organisms thriving winter reduced their relative catabolic genes. Based our functional analysis, see transition where nitrogen-based chemolitotrophy plays relevant role based carbohydrates released seem specialize sources. IMPORTANCE one environments most anthropogenic climate change. It expected rise temperature change ice cover will impact marine communities biogeochemical cycles. this regard, blooms. study, combine genetic data cycle at level over time series covering July. Our results indicate importance taxa (from bacteria) processes chemolithoautotrophy incorporation sources) cycling period. provides baseline future research should include additional methodologies like analysis fully understand these due global

Language: Английский

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