Algae•Aitana•Marta•María

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.

How do algae eat?• they are autotrophic, obtaining their energy

through photosynthesis

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

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.

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

Chlocophyta(green algae)

• are the large group of algae from which the higher plants emerged.

• Almost all forms have chloroplasts. These contain chlorophyll, giving them a bright green colour

• Green algae are found attached to rocks.

Algae parts

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)

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:

The most used are:

• Saccharina Japonica (“kombu” is used in meat, fish and soup)• Undaria Pinnatifida ( “Wakame” or “Miyeok”)• Porphyra (“Noi”)

Europe´s native species

•Ulva•Himanthalia elongata•Porphyra dioica

Ulva algae

Himanthalia

elongata

Porphyra

dioica

Agricultural

• Mostly used as fertilizer• Most common are:

-Ascophyllum nodosum-Fucus serratus-Laminaria

Ascophyllum

nodosum

Fucusserratus

Laminaria

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

Gelidium

Pterocladia

Chondrus

Mastocarpus

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)

Sargassum

Corallina

The end