Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Environmental microbiology
2026
|
| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/41502155/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1868266102692249600 |
|---|---|
| author | Kim, Sukki Sookyoung D'Agostino, Elisa Needham, David M |
| author_facet | Kim, Sukki Sookyoung D'Agostino, Elisa Needham, David M Kim, Sukki Sookyoung D'Agostino, Elisa Needham, David M |
| collection | PubMed - marine biology |
| contents | Dynamics and Eco-Genomics of Baltic Sea Nitrifiers: Seasonality, Niches, Interactions and Genomic Uniqueness. Kim, Sukki Sookyoung D'Agostino, Elisa Needham, David M Seawater Nitrification Seasons Archaea Metagenomics Oceans and Seas Phylogeny Nitrites Nitrates Genomics Ecosystem Sequence Analysis, DNA Bacteria Nitrification is widespread across marine systems, yet the ecological and evolutionary drivers shaping nitrifier populations remain largely unknown. The Baltic Sea, a brackish basin with pronounced gradients in salinity, oxygen, nutrients and strong seasonality, is a valuable model environment to investigate these questions. Here, we combined metagenomics and rRNA gene sequencing to characterise the spatiotemporal dynamics and genomic diversity of nitrifiers, alongside physicochemical measurements. Nitrifiers were persistently abundant throughout aphotic waters, with vertical niche partitioning and seasonal peaks in surface waters from late fall to early spring. The seasonal peaks were positively correlated with nitrite, nitrate and diverse other prokaryotes, and negatively correlated with solar radiation and chlorophyll. To probe the genomic basis of these ecological patterns of the numerically dominant nitrifier, we recovered five novel genomes of ammonia-oxidising archaea through metagenomics of bulk samples and selective enrichments, including the dominant taxon from aphotic depths. Comparative genomics showed high gene conservation, with variation largely in genes linked to interactions with the external environment and nitrogen and phosphorus metabolism between central surface and deep types. Together, our study provides insights into niches of Baltic Sea nitrifiers and begins the process of understanding the mechanisms and functional implications of these patterns. |
| format | Artículo científico |
| id | pubmed_41502155 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Environmental microbiology |
| record_format | pubmed |
| spellingShingle | Dynamics and Eco-Genomics of Baltic Sea Nitrifiers: Seasonality, Niches, Interactions and Genomic Uniqueness. Kim, Sukki Sookyoung D'Agostino, Elisa Needham, David M Seawater Nitrification Seasons Archaea Metagenomics Oceans and Seas Phylogeny Nitrites Nitrates Genomics Ecosystem Sequence Analysis, DNA Bacteria Dynamics and Eco-Genomics of Baltic Sea Nitrifiers: Seasonality, Niches, Interactions and Genomic Uniqueness. Kim, Sukki Sookyoung D'Agostino, Elisa Needham, David M Seawater Nitrification Seasons Archaea Metagenomics Oceans and Seas Phylogeny Nitrites Nitrates Genomics Ecosystem Sequence Analysis, DNA Bacteria Nitrification is widespread across marine systems, yet the ecological and evolutionary drivers shaping nitrifier populations remain largely unknown. The Baltic Sea, a brackish basin with pronounced gradients in salinity, oxygen, nutrients and strong seasonality, is a valuable model environment to investigate these questions. Here, we combined metagenomics and rRNA gene sequencing to characterise the spatiotemporal dynamics and genomic diversity of nitrifiers, alongside physicochemical measurements. Nitrifiers were persistently abundant throughout aphotic waters, with vertical niche partitioning and seasonal peaks in surface waters from late fall to early spring. The seasonal peaks were positively correlated with nitrite, nitrate and diverse other prokaryotes, and negatively correlated with solar radiation and chlorophyll. To probe the genomic basis of these ecological patterns of the numerically dominant nitrifier, we recovered five novel genomes of ammonia-oxidising archaea through metagenomics of bulk samples and selective enrichments, including the dominant taxon from aphotic depths. Comparative genomics showed high gene conservation, with variation largely in genes linked to interactions with the external environment and nitrogen and phosphorus metabolism between central surface and deep types. Together, our study provides insights into niches of Baltic Sea nitrifiers and begins the process of understanding the mechanisms and functional implications of these patterns. |
| title | Dynamics and Eco-Genomics of Baltic Sea Nitrifiers: Seasonality, Niches, Interactions and Genomic Uniqueness. |
| topic | Seawater Nitrification Seasons Archaea Metagenomics Oceans and Seas Phylogeny Nitrites Nitrates Genomics Ecosystem Sequence Analysis, DNA Bacteria |
| url | https://pubmed.ncbi.nlm.nih.gov/41502155/ |