Animal+Vegetal

Symbiosis in plankton

These protists belong to both the vegetal and animal kingdoms. They live in symbiosis with micro-algae.

In this episode

  • dinoflagelle
    DinoflagellatePyrocystis elegans
  • diatomee
    Centric diatom
  • acanthaire_lithoptera
    AcantharianLithoptera mulleri
  • radiolaires
    RadiolarianAulacantha scolymantha
  • colozum
    RadiolarianCollozum inerme

Narration

Unlike their land relatives, many marine organisms do not belong to either the plant or animal kingdom. They’re both at the same time! These hybrid cells are the result of symbiosis between algae and animals both being single-celled protists. Like all plants, algae produce organic matter using sunlight.

Through photosynthesis, they supply food for their animal host. The host, in turn, nurses its algae by providing optimal conditions: nutrients, exposure to sunlight as well as protection from predators.

Symbiosis is widespread among unicellular organisms, but is important for multi-cellular creatures too: Certain jellyfish or velellas form alliances with algae. Harmonious cooperation helps them survive in the plankton jungle!

Share this on

Original Idea
Christian Sardet

Director
Noé Sardet

Scientific consultant
Johan Decelle, Colomban de Vargas

Texts
Christian Sardet

Images
Christian Sardet, Sharif Mirshak, Noé Sardet

Editing
Noé Sardet

Voice
Bernard Dubreuil

Sound Engineer
Noé Sardet

Music
Bernard Dubreuil (chants de gorge)

Creative Commons Licence :
Attribution Non-Commercial
No Derivative

Related Videos