We are mostly familiar with common groups of algae-like pond scum, seaweeds, lake algal blooms, etc.
Introduction Green Algae are a group of algae belonging to Chlorophyta and capable of photosynthesis. We are mostly familiar with common groups of algae-like pond scum, seaweeds, lake algal blooms, etc. They are abundant and are present around us. There are about 9000 to 12000 species in the group of green algae. They have the pigment chlorophyll and hence they are capable of photosynthesis. These algal life forms are important organisms. They play a vital role in the ecosystem and the emergence of life. What is Green Algae? [Image will be uploaded Soon] Algae is referred to as a group of organisms capable of photosynthesis. They have some similar traits as to plants but lack most of the plant features like leaves, stem, roots, a vascular system, etc. Algae are mostly unicellular organisms appearing in a variety of shapes and sizes. Naturally, they do not have a definite body structure. Algae are very diverse in nature. They may be microscopic or macroscopic and live in colonies. Or they can even be multicellular organisms. Seaweeds have a leafy appearance. Generally, they vary in size from 0.2 to 2 micrometres. However, some macroscopic algae can be as big as 60 meters in size. And, they are found in both freshwaters as well as saline water. They do not have a natural unit which may indicate they descended from a common ancestor. They may be prokaryotic or eukaryotic, but still, all of them are generally referred to as algae. Cellular Structure
Examples of Green Algae Marimo [Image will be uploaded Soon] Marimo is a different and unusual growth form of green algae that grows as round green and puffy balls. The species is normally found in Japan and Northern Europe in freshwater sources. It is a eukaryotic alga with a fluffy green appearance.
Sea Lettuce [Image will be uploaded Soon] It comprises the genus Ulva. It is a group of edible green algae widely found along the coasts of oceans around the world. Sea lettuce is eaten by several different sea animals, including manatees and the sea slugs. Many species of sea lettuce are also eaten raw by humans as a salad. It’s nutritious and a source of proteins, dietary fibres, and vitamins.
Ulva Intestinalis [Image will be uploaded Soon] This green alga is also known as gutweed, sea lettuce, and grass kelp. They are tubular and belong to family ulvaceae.
Order: Ulvales Haematococcus Pluvialis [Image will be uploaded Soon] This is a freshwater species of Chlorophyta belonging to the family Haematococcaceae. This species is known to have the high content of antioxidant astaxanthin and it has its application in aquaculture and cosmetics.
Codium Fragile or Dead man’s fingers [Image will be uploaded Soon] Codium fragile is generally called Dead Man Fingers because it resembles one in appearance, or Green Sea Fingers, Forked Felt-Alga, Felty Fingers, Stag Seaweed, Green Sponge, Sponge Seaweed, Green Fleece, and Oyster Thief. It is a seaweed genus in the Codiaceae family.
Chlorella [Image will be uploaded Soon] Chlorella is a single-celled or unicellular green that is triangular in shape. Its diameter ranges from 2 to 10 μm. They do not possess flagella.
Water Silk [Image will be uploaded Soon] Is a green alga of the genus spirogyra. It is named so because of the spiral arrangement of the chloroplast which is also a characteristic of this genus. There are approximately 400 species of spirogyra found across the world and they live in freshwater habitats. The slimy filamentous green masses on the surface of the water are spirogyra.
Green Algae are a group of algae belonging to Chlorophyta and capable of photosynthesis. We are mostly familiar with common groups of algae-like pond scum, seaweeds, lake algal blooms, etc. They are abundant and are present around us. They have chloroplast with chlorophyll a and b pigments and accessory pigments beta carotene, xanthophylls stacked in the thylakoid.
A rapid increase in the algal population usually indicated by water discolouration of their pigments is called an algae bloom. Algae is a diverse organism consisting of unicellular as well as multicellular forms. Algae bloom is generally rapid growth of unicellular microscopic algae. Mostly blue-green algal blooms are not toxic, but some algae are capable of producing toxins and hence, an algal bloom of such algae is toxic in nature. Toxic algal blooms also lower oxygen levels in natural water sources killing other life forms.
Algal blooms may occur as a result of nutrient runoff mostly from fertilizers given to plants. When elements like nitrogen, phosphorus enter the water sources they prompt excessive algae growth.
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