Seaweed – the most ancient life form on Earth. Generally they live in water, but there are types capable to live also on the land. They chose crude sites of the soil, bark of trees and other places with high humidity. Best of all the nitchaty trentepoliya and a colonial gleokapsa adapted to life out of water plevrokokk.
Plevrokokk
Plevrokookk treats a sort of green seaweed from the Hetoforovye family. Its cages have spherical shape. It is possible to meet both single cages, and connected in groups. Sometimes they form small short branches. As for the structure of a plevrokokk, its protoplast is deprived visible by a vacuole, and chloroplast single, without pyrenoids.
Most often plevrokokk it is possible to meet on bark of trees and on rocks where it forms poroshkovaty bright green raids. As a rule, it occupies the lowermost points of surfaces as at the earth air always a little more damp. However at the same time he is capable to endure full drying. He settles down always on North side of a tree or a stone. Determine the direction of parts of the world by a plevrokokk in the forest.
Nitchaty trentepoliya
Trentepoliya is the whole sort of nitchaty green seaweed from the Trentopolisovye family. Seaweed of this sort live or epifitno on bark of trees, or litofitno on damp surfaces of stones. Besides they can create symbiotic associations with hyphas of mushrooms, forming lichens. Trentepoliya is capable to occupy all tree trunk, being highlighted on it in bright orange or brick-red color. Such coloring of threads of an alga is caused by high concentration in its cages of carotinoids. The alga always on North side of a trunk is located. As well as plevrokokk, time having lodged on any surface, the trentepoliya does not disappear. During the periods of a drought or strong frosts it falls into an anabiotic state and safely endures an adverse season.
Colonial gleokapsa
On rocky surfaces it is possible to meet also other seaweed relating to blue-green. They form raids and crusts which in a dry state have black coloring on a surface of stones and easily crumble fingers, and when moistening brighten and become slippery. The alga, most widespread in rocks, – the colonial gleokapsa having thick mucous membranes of the cages painted in yellow, red or violet colors. It treats Hrookookkov' order and as his many representatives, forms mucous colonies. They are covered with the general layered cover in which the cages which are also covered with a cover are located. Like a trentepoliya and a plevrokokk, the gleokapsa chooses North sides of stones and under unsatisfactory conditions of dwelling falls into the sleeping state.