Global phylogeography of marine $Synechococcus$ in coastal areas reveals strong community shifts
Résumé
Marine Synechococcus comprise a numerically and ecologically prominent
phytoplankton group, playing a major role in both carbon cycling and trophic
networks in all oceanic regions except in the polar oceans. Despite their high abundance
in coastal areas, our knowledge of Synechococcus communities in these environments
is based on only a few local studies. Here, we use the global metagenome
data set of the Ocean Sampling Day (June 21st, 2014) to get a snapshot of the taxonomic
composition of coastal Synechococcus communities worldwide, by recruitment
on a reference database of 141 picocyanobacterial genomes, representative of the
whole Prochlorococcus, Synechococcus, and Cyanobium diversity. This allowed us to
unravel drastic community shifts over small to medium scale gradients of environmental
factors, in particular along European coasts. The combined analysis of the
phylogeography of natural populations and the thermophysiological characterization
of eight strains, representative of the four major Synechococcus lineages (clades I to
IV), also brought novel insights about the differential niche partitioning of clades I
and IV, which most often co-dominate the Synechococcus community in cold and
temperate coastal areas. Altogether, this study reveals several important characteristics
and specificities of the coastal communities of Synechococcus worldwide.
Fichier principal
Doré et al_Msystems_2022_Global Phylogeography of Marine Synechococcus in Coastal Areas Reveals Strong Community Shifts.pdf (1.88 Mo)
Télécharger le fichier
| Origine | Fichiers produits par l'(les) auteur(s) |
|---|
