Green algae

Июль 23, 2022

Содержание

2. GREEN ALGAE The green algae is the most diverse and biggest group of algae. The group
3. The green algae include 5 classes: Volvocophyceae (volvox, chlamydomonas) Protococcophyceae (chlorella) Ulotrichophyceae (ulva) Siphonophyceae (caulerра) Conjusatophyceae
4. Other representatives of the green algae The structure of chlamydomonas
5. The sediments of the green algae meet in peat deposits of ponds. SEDIMENTS They can also
6. TIME SPAN The green algae appeared about 3 billion years ago in Precambrian. But multicellular green
7. HABITAT PARAMETERS The green algae can sustaine high t° to 50°C. They prefer acid waters where
8. The biggest diversity of the green algae is observed in eutrophic and mesotrophic swamps and seas.
9. RECONSTRUCTIONS The green algae are important indicators of environmental conditions. They are quickly capable to respond
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GREEN ALGAE
The green algae is the most diverse and biggest group

of algae.
The group contains about 7000 living species.
They are eukaryote and more closed to the land plants.
Most of the green algae are freshwater and only 10% live in seas.

The green algae in freshwater pond

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The green algae include 5 classes:
Volvocophyceae (volvox, chlamydomonas)
Protococcophyceae (chlorella)
Ulotrichophyceae (ulva)
Siphonophyceae (caulerра)
Conjusatophyceae

(spirogyra)

Chlamydomonas

Spirogyra

Volvox

Chlorella

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Other representatives of the green algae
The structure of chlamydomonas

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The sediments of the green algae meet in peat deposits of

ponds.

SEDIMENTS

They can also grow on moist soils, walls, rocks and tree trunks. Strains of Chlorella can bear moderate hot waters. Some forms live in snow or frozen lakes (e.g., Seotiella, Homidium).

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TIME SPAN
The green algae appeared about 3 billion years ago in

Precambrian. But multicellular green algae appeared about 1 billion years ago.
Among the green algae were preserved forms which give representation about complication of structure.

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HABITAT PARAMETERS
The green algae can sustaine high t° to 50°C.
They prefer

acid waters where pH is less 7.
Deep to 6 meters.
They can give a colour to glaciers, snow.

Snow thawing and reproduction of chlamydomonas

Chlorella

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The biggest diversity of the green algae is observed in eutrophic

and mesotrophic swamps and seas.

“The green algae attack China”

Enteromorpha prolifera.

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RECONSTRUCTIONS
The green algae are important indicators of environmental conditions. They are

quickly capable to respond to environmental changes.
They leave reliable morphological and biogeochemical records in lakes and ponds sediments and can be used by paleolimnologists to reconstruct past environments.