Kingdom - Protista

The Protista are mainly single-celled organisms although some are multicellular. They can be either heterotrophic (deriving energy from organic materials) or autotrophic (deriving energy from sunlight), and occur in water, damp soil, or within the bodies of animals including humans. They are eukaryotic organisms (they possess a membrane-bound nucleus).

The Kingdom includes slime molds, microalgae and protozoans.

Many microalgae are used commercially. For example:

Human food


  • Chlorella vulgaris - Food supplement
  • Haematococcus pluvialis - Food supplement
  • Dunaliella salina - Food supplement
  • Spirulina maxima - Food supplement
  • Aphanizomenon flos-aquae - Food supplement

Cosmetics


  • Spirulina platensis - Face and skin care products
  • Chlorella vulgaris - Face and skin care products
  • Dunaliella salina - Skin conditioning
  • Nannochloropsis oculata - Skin conditioning

High-value products


  • Spirulina platensis - Phycocyanin
  • Dunaliella salina - Beta-carotene
  • Haematococcus pluvialis - Astaxanthin, lutein
  • Scenedesmus sp. - Zeaxanthin, lutein
  • Chlorella minutissima - Eicosapentarnoic acid (EPA)
  • Schizochytrium sp. - Docosahexanoic acid (DHA)
  • Euglena gracilis - Biotin (vitamin B7), alpha-tocopherol (vitamin E)
  • Prototheca moriformis - (vitamin C)

Biofuels


  • Botryococcus sp. - Biofuel
  • Chlamydomonas sp. - Biofuel

Aquaculture feed


  • Chlorella sp. -Aquaculture feed
  • Tetraselmis sp. - Aquaculture feed
  • Isochrysis sp. - Aquaculture feed
  • Pavlova sp. - Aquaculture feed
  • Phaedodactylum sp. - Aquaculture feed
  • Chaetoceros sp. - Aquaculture feed
  • Nannochloropsis sp. - Aquaculture feed
  • Skeletonema sp. - Aquaculture feed
  • Thalassiosira sp. - Aquaculture feed
  • Spirulina sp. - Aquaculture feed

Some of these Protista will be examined in detail elsewhere in this website.

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