identification methods of algae .Microalgal technology

Identification methods of microalgae

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INTRODUCTION
GREEN ALGAE
BLUE GREEN ALGAE
DI-ATOMS
IDENTIFICATION OF ALGAE BASED ON FIELD
•Pithophora
•Spirogyra
•Chara

3. •Black filamentous mat
•Blue green algae
PREPARATION OF ALGAL SAMPLE
MICROSCOPIC EXAMINATION OF ALGAL SAMPLE
COMMON MICROSCOPIC FEATURES OF ALGAE

4. Identification methods of algae
INTRODUCTION
Algae can be of planktonic, filamentous or macroalgae
Planktonic: Distributed through the water column, giving a colorto the
water.
Filamentous: They are generally mat-like entanglements that show up on
the bottom or the surface of the water.
Macro algae: grow up from the bottom of the system.

5.  PLANKTONIC(DISCOLORATION OR SCUM FORMING ALGAE )
FILAMENTOUS(MAT-FORMING)ALGAE
PLANT-LIKE MACROALGAE

6. Different algae contain different pigments in them for attaining sunlight,
attaining energy through use of the sun rays.
One of the common types is green algae.
There is also blue-green algae, red algae, and even gold algae.
So, there are many different types of algae and they can have many
different pigments.

7. GREEN ALGAE
Green algae contain primarily chlorophyll A and B.
This reflects that green color.
This makes them look either a bright or a dull green in nature and these
are all over the board.
These can be very small, planktonic and microscopic forms, or they can be
thick large mats, and can even include macro algae as well.

8. BLUE-GREEN ALGAE
Also known as cyanobacteria.
These contain the pigment phycocyanin, so this is a blue-green pigment.
They also have this other pigment that makes them appear a darker green,
sometimes even black in color with this darker blue-green pigment

9. DI-ATOMS
They often appear goldish, gray, or yellow-green in color.
 Because they have fucoxanthin. A pigment called
 They look like little pieces of glass because they have silica in their cell
wall

10. IDENTIFICATION OF ALGAE BASED ON
FIELD
By feeling the algae, actually getting in there and grabbing it and smelling it.
Pithophora
It’s a green filamentous alga.
It almost looks like a cotton ball.
This is also known as cotton algae or horsehair algae.

11. Spirogyra
Spirogyra is more of a bright green filamentous alga.
It’s more slick feeling.

12. Chara
This is a type of macroalgae.
It often grows up from the bottom of the pond like a
macrophyte or a land plant.

13. Black filamentous mats
Lyngbya is a filamentous cyanobacterium, often dark in color.
It can grow way down in the sediments and appear almost black in nature
sometimes and smells bad, too.
This produces some taste and odor compounds called MIB and geosmin,
making it smell dirty and fishy

14. Blue green algae
These are actually cyanobacteria, are potential toxin or taste and odor
producers. Not be able to grab them, they often form this color or scums
on the surface.
Some of the planktonic algae are extremely small, and they require a
microscope for correct identification.