This document discusses different types of algae. It describes that algae are aquatic organisms that are similar to plants but lack roots, stems, and leaves. The document outlines the three main types of algae - green algae, red algae, and brown algae. It provides details on different species within each type. The document also discusses how algae obtain energy through photosynthesis and their various uses including as a nutritional food source, in agriculture as fertilizer, for industrial applications like cosmetics, and historically for medical purposes.

1. Algae
•Aitana
•Marta
•María

2. What are algae?
•Algae comprise several different groups of
living things which are similar to plants but are
not actually true plants.
•Algae are aquatic organisms that do not have
roots, leaves or stems.

3. How do algae eat?
• they are autotrophic, obtaining their energy
through photosynthesis

4. Algae types
-Green algae(clocophyta)
-Red algae(rhodophyta)
-Brown algae(phaeophyta)

5. Phaeophyta(bronw algae)
It includes a much-advanced group
of algae, which are mostly marine
forms.
The name brown algae comes from
the fact that they contain large
quantities of a brown colored
pigment (fucoxanthin) which
masks the color of other
pigments.

6. Rhodophyta(red algae)
• They are generally found attached to rocky stones.
• It is a group consisting of multicellular aquatic algae.
•The members of this group are
commonly called 'red algae' due
to the presence of a
characteristic red pigment
called phycoerythrin
(red), which masks the color of
other pigments

7. Chlocophyta(green algae)
• are the large group
of algae from which
the higher plants
emerged.
• Almost all forms
have chloroplasts.
These
contain chlorophyll, giv
ing them a bright
green colour
• Green algae are found
attached to rocks.

8. Algae parts

9. USES
• Despite of being an unknown
group, algae offer a very big number
of uses:
-Nutritional (in food)
-Agricultural (in farming)
-Industrial (in industry)
-Medical (in medicine)

10. Nutritional
• Probably the most known use for
algae.
• In Spain, is not very popular but in
other countries like Japan and China
is used every day since more than 2600
years ago.
• There are about 200 species used for
human consume. The most used are:

11. The most used are:
• Saccharina Japonica
(“kombu” is used in
meat, fish and soup)
• Undaria Pinnatifida (
“Wakame” or “Miyeok”)
• Porphyra (“Noi”)

12. Europe´s native species
• Ulva
• Himanthalia elongata
• Porphyra dioica

13. Ulva
algae
Himanth
alia
elongat
a Porphy
ra

14. Agricultural
• Mostly used as fertilizer
• Most common are:
-Ascophyllum nodosum
-Fucus serratus
-Laminaria

15. Ascophyl Fucus
Lamina
lum serrat
ria
nodosum us

16. Industrial
• Algae are used for cosmetics ,food
and medicaments.
• Most common are:
-Gelidium sesquipedale
-Pterocladia capillalea
• Most common in Spain (used in milk
products):
-Chondrus Crispus
-Mastocarpus Stellatus

17. Gelidium Chondrus
Pterocla Mastoca

18. Medical
• During a lot of time algae
have been used to treat
illness like tuberculosis, flu
and fam. Also for herpes
and cancer.(Sargassum and
Corallina)

19. Sargassu
m
Corallin
a

20. The end