ArticleCommunications earth & environment2023
Microscale dynamics promote segregated denitrification in diatom aggregates sinking slowly in bulk oxygenated seawater.
Article in Communications earth & environment, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Phytoplankton dynamics shape bacterioplankton community structure and metabolism during the austral summer-autumn transition in the Western Antarctic Peninsula.FEMS microbiology ecology · 2026Article
- Article
- Microbially enhanced dissolution of calcite in sinking marine particles.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Niche adaptation of particle-associated ammonia-oxidizing archaea sustains nitrification under marine deoxygenation.Frontiers in microbiology · 2026Article
- Detergent-based separation of microbes from marine particles.Applied and environmental microbiology · 2025Article
- Mechanistic understanding of nitrate reduction as the dominant production pathway of nitrous oxide in marine oxygen minimum zones.Nature communications · 2025Article
- Dynamics of microbial communities in Western Antarctic Peninsula waters shaped primarily by the biological interactions.Frontiers in microbiology · 2025Article
- Ecological dynamics explain modular denitrification in the ocean.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Microscale advection governs microbial growth and oxygen consumption in macroporous aggregates.mSphere · 2024Article
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Authors and funding
5 authors.
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No grant is acknowledged in the PubMed record.
Abstract
Sinking marine particles drive the biological pump that naturally sequesters carbon from the atmosphere. Despite their small size, the compartmentalized nature of particles promotes intense localized metabolic activity by their bacterial colonizers. Yet the mechanisms promoting the onset of denitrification, a metabolism that arises once oxygen is limiting, remain to be established. Here we show experimentally that slow sinking aggregates composed of marine diatoms-important primary producers for global carbon export-support active denitrification even among bulk oxygenated water typically thought to exclude anaerobic metabolisms. Denitrification occurs at anoxic microsites distributed throughout a particle and within microns of a particle's boundary, and fluorescence-reporting bacteria show nitrite can be released into the water column due to segregated dissimilatory reduction of nitrate and nitrite. Examining intact and broken diatoms as organic sources, we show slowly leaking cells promote more bacterial growth, allow particles to have lower oxygen, and generally support greater denitrification.
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