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Items tagged with: phytoplankton

Sunday #Plankton #Factoid 🦐🦠

Coccolithophores (phylum Haptista) are a type of #phytoplankton covered in white calcium carbonate coccolith plates. Blooms in the surface seas can be seen in satellite images because these shells. They are the primary component in #chalk deposits such as the white cliffs of Dover (the "calcite belt" in the temperate north) and as such are very important for the biological carbon pump.
#climate
Emiliania huxleyi (below) is a common species.
https://joidesresolution.org/the-magical-world-of-coccolithophores/

Scanning electron micrograph showing a spherical object covered scales with radiating spokes. A 2 micron scale bar indicates it is about 7 microns in diameter. Emiliania huxleyi is a common coccolithophorid.
Satellite image of a bright white blue swirling bloom of algae against a dark blue ocean background. Swirls interact with the green headland. Landsat image of a 1999 E. huxleyi bloom in the English Channel https://en.m.wikipedia.org/wiki/Emiliania_huxleyi

The Magical World of Coccolithophores

  What are these beautiful algae? Where are they found and why are they important? Teachers down load the word document at the end of the article with questions. These photographs show 4 coccolitho…
JOIDES Resolution
#Climate #phytoplankton #plankton #factoid #chalk

#Virus control

This exciting new research explores the influence of #virus #infection in changing the balance of organic matter degradation between #bacteria and #eukaryotes in #marine #carboncycling during #phytoplankton blooms.

Based on #mesocosm studies, this research demonstrates how #viruses infecting different #microorganisms change community dynamics and the release and potential fate of marine carbon from primary production.

Learn more in this new research in Nature Communications on:

https://www.nature.com/articles/s41467-023-36049-3

#microbiology #ecology #MicrobialEcology

Viral infection switches the balance between bacterial and eukaryotic recyclers of organic matter during coccolithophore blooms - Nature Communications

Algal blooms are hotspots of marine primary production that play central roles in microbial ecology and global elemental cycling.
Nature
#ecology #Virus #bacteria #microbiology #infection #viruses #marine #phytoplankton #eukaryotes #carboncycling #mesocosm #MicroOrganisms #MicrobialEcology

This is interesting and might be relevant for bloom-ending processes in #phytoplankton. Roseobacter can coexist with Emiliania huxleyi (and important bloom forming coccolithophore important to carbon cycling), providing vitamins for ready supplies of sugar and amino acids. However when an algal cell is dying they bacteria can collect additional compounds and leave in search other other hosts. #algae #oceanography

https://phys.org/news/2023-01-friend-foe-bacteria-algal-hosts.amp

'Friend or foe' bacteria kill their algal hosts when coexisting is no longer beneficial

Scientists have detailed a lifestyle switch that occurs in marine bacteria, in which they change from coexisting with algae hosts in a mutually beneficial interaction to suddenly killing them. The results are published today in eLife.
Science X (Phys.org)
#oceanography #phytoplankton #algae

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