The shallow sea area below the growth low tide line-the place where the ocean meets the land, where the impact of waves is relatively mild, the seawater is rich in minerals and the sunshine is abundant. Both red algae and brown algae contain chlorophyll, although the colors are different. They can use sunlight for photosynthesis to make food. They carry out photosynthesis, and the oxygen released is indispensable for animals to breathe.
Characteristics of seaweed:
1, high brightness
Seaweed is the only angiosperm that lives in the sea. Unlike other animals and plants in the ocean, it needs plenty of sunshine during its growth. Under sunlight, it synthesizes organic matter through photosynthesis and provides nutrition for itself. Therefore, algae can't live in the deep sea where sunlight can't reach. Shallow water layer and ocean surface layer are the most suitable areas for growth.
2. Morphological characteristics
Seaweed is a monocotyledonous herb growing in temperate coastal waters, with developed rhizomes, undifferentiated stems and leaves, soft, banded or linear leaves, air cavities in the middle of the leaves, basal flowers starting from the roots, higher stamens than corollas, and rosary pollen stuck together in chains, which is suitable for underwater survival.
3. Corrosion resistance
Seaweed is corrosion-resistant, very durable and warm. Among them, kelp and shrimp-like algae are good sound insulation materials and thermal insulation materials. Many coastal fishermen in the northern region also collect seaweed to dry as a roof material, which can keep warm and prevent rain.
4. Protecting biological communities
Seaweed needs to be developed, which can help the soil in coastal areas resist the erosion of waves and protect benthos. Seaweed absorbs carbon dioxide by producing oxygen through photosynthesis, which improves the surrounding fishery environment. The growth area of seaweed is rich in humus, which is suitable for the growth of shrimp larvae and provides a good habitat for seabirds.