are (thalloid plants) macroscopic algae, which mean they have no differentiation of true tissues such as roots, stems and leaves. They have leaflike appendages.
- Seaweeds, the larger and visible marine plants are found attached to rocks, corals and other submerged strata in the intertidal and shallow sub tidal zones of the sea.
- Seaweeds grow in shallow coastal waters wherever sizable substata is available.
- Based on the colour of their pigmentation, sea weeds are broadly classified into different classes such as blue-green, green, brown, red, etc.
FUNCTIONS OF SEAWEEDS
- Food for marine organism
- habitat for fish breeding grounds
- Source of sediment
USES OF SEAWEEDS
Seaweeds are important as food for humans, feed for animals, and fertilizer for plants.
Seaweeds are used as a drug for goiter treatment, intestinal and stomach disorders.
Products like agar-agar and alginates, iodine which are of commercial value, are extracted from seaweeds.
By the biodegradation of seaweeds methane like economically important gases can be produced in large quantities.
Extracts of some seaweed species show antibacterial activity.
Seaweeds are also used as the potential indicators of pollution in coastal ecosystem, particularly heavy metal pollution due to their ability to bind and accumulate metals strongly.