@article{fdi:010095348,
  title = {{R}hizosolenia mat diatoms associate with nitrogen-fixing microbes},
  author = {{T}urk-{K}ubo, {K}. and {B}enavides, {M}ar and {M}ills, {M}. {M}. and {S}mith, {S}. {R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}ome {R}hizosolenia diatoms living in oligotrophic marine ecosystems are known to form large, conspicuous mats and are thought to be sources of new nitrogen to surface waters via vertical migration to the nitracline where subsurface nitrate is accessed for growth. {T}hese vertically migrating {R}hizosolenia mats are chronically under sampled, and both the diatom species comprising the mats and the associated microbiome have not been characterized using modern molecular techniques. {H}ere we present the first {DNA}-based analysis of {R}hizosolenia mats collected in the {N}orth {P}acific {S}ubtropical {G}yre. {U}sing sequencing of 18{S} r{RNA} and nif{H} genes (a proxy for {N}-2 fixation capacity), we report on the molecular diversity of mat-forming {R}hizosolenia species, which include two newly sequenced clades, and an assemblage of associated {N}-2-fixing microorganisms that is distinct from the non-mat associated water column assemblage. {O}ur findings advance knowledge of oligotrophic diatom diversity and challenge prevailing views of their nitrogen sources, suggesting these mats may obtain nitrogen through association-based {N}-2 fixation. {F}urther work is needed to understand the nature of these associations, and whether {R}hizosolenia mat communities are a significant unrecognized source of {N}-2-fixation-derived new nitrogen to the oligotrophic surface waters.},
  keywords = {{R}hizosolenia ; diatoms ; diazotrophs ; {N}-2 fixation ; nif{H} ; {PACIFIQUE} ; {PACIFIQUE} {NORD}},
  booktitle = {},
  journal = {{ISME} {C}ommunications},
  volume = {5},
  numero = {1},
  pages = {ycaf159 [7 p.]},
  year = {2025},
  DOI = {10.1093/ismeco/ycaf159},
  URL = {https://www.documentation.ird.fr/hor/fdi:010095348},
}