Corrigendum: Biogeography of southern ocean active prokaryotic communities over a large spatial scale.

[This corrects the article DOI: 10.3389/fmicb.2022.

Biogeography of Southern Ocean Active Prokaryotic Communities Over a Large Spatial Scale.

The activity of marine microorganisms depends on community composition, yet, in some oceans, less is known about the environmental and ecological processes that structure their distribution. The objective of this study was to test the effect of geographical distance and environmental parameters on prokaryotic community structure in the Southern Ocean (SO). We described the total (16S rRNA gene) and the active fraction (16S rRNA-based) of surface microbial communities over a ~6,500 km longitudinal transect in the SO.

Different Active Microbial Communities in Two Contrasted Subantarctic Fjords.

Microorganisms play a crucial role in biogeochemical processes affecting the primary production and biogeochemical cycles of the ocean. In subpolar areas, the increment of the water temperature induced by climate change could lead to changes in the structure and activity of planktonic microbial communities. To understand how the structure of the microbial community in Chilean Patagonian fjords could be affected by climate change, we analyzed the composition of the prokaryotic community (bacteria-archaea) in two fjords (Pia and Yendegaia) with contrasting morphological and hydrological features.

Exoproteome Analysis of the Seaweed Pathogen R11 Reveals Temperature-Dependent Regulation of RTX-Like Proteins.

Climate fluctuations have been linked to an increased prevalence of disease in seaweeds, including the red alga , which is susceptible to a bleaching disease caused by the bacterium R11 under elevated seawater temperatures. To further investigate the role of temperature in the induction of disease by R11, we assessed the effect of temperature on the expression of the extracellular proteome (exoproteome) in this bacterium. Label-free quantitative mass spectrometry was used to identify 207 proteins secreted into supernatant fraction, which is equivalent to 5% of the protein coding genes in the R11 genome.