Microdiversity Shapes the Seasonal Niche of Prokaryotic Plankton Inhabiting Surface Waters in a Coastal Upwelling System.

ABSTRACT: Seasonality of prokaryotic abundance, diversity and community composition was investigated over a 2-year period in a coastal upwelling time-series station. A marked seasonality was found for prokaryotic abundance, peaking during upwelling and upwelling-to-downwelling transition, and decreasing during downwelling. The latter included a deeper mixed layer and a homogeneous water column favouring higher abundance of archaea (i.e., Marine Group II, Candiadatus nitrosopelagicus), SAR406 clade and the group Bacteria_Others including > 400 rare taxa. Upwelling and transition conditions, characterised by enhanced vertical stratification and a marked hydrographic variability, included a community less diverse with core-phylotypes proliferating, i.e., Flavobacteriaceae, Amylibacter and Planktomarina

SUBMITTER: Orta-Ponce CP 

PROVIDER: S-EPMC12280048 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature