The world’s major biomes include:
(a) Tropical rain forest:
Tropical rain forest is the home to more species than all other biomes combined. The leafy tops of tall trees form a dense covering called canopy in the shade below the canopy, a second layer of shorter trees and vines forms an under story.
(b) Tropical dry forest:
Tropical dry forest grows in places where rainfall is highly seasonal rather than year around during the dry season; nearly all the trees drop their levels to conserve water.
(c) Tropical savanna:
Tropical savanna receives more seasonal rainfall than desert; it is characterized by a corer of grasses, compact soils, and fairly frequent fires.
(d) Desert:
Many undergo extreme temperature changes during the course of a day, alternating between hot and cold. Organisms in this biome can tolerate the extreme conditions.
(e) Temperate grassland:
Temperate grasslands are characterized by rich mix of grasses and under laid by most fertile soils.
(f) Temperate woodland and scrubland:
Temperate woodland and scrubland is characterized by a semiarid climate, a mix of shrub communities, and open wood lands.
(g) Temperate forest:
Temperate forest contains a mixture of deciduous and coniferous trees. It climatic conditions are cold to moderate winters, warmer summer, and year-round precipitation.
(h) Northwestern coniferous forest:
Mild, moist air from the Pacific Ocean provides abundant rainfall to this biome because of its bush vegetation. The northwestern conifers forest is sometimes called a temperate rain forest.
(i) Boreal forest:
Boreal forest is known as taiga occurring in northern hemisphere. Winters are bitterly cord, but summers are mild and long enough to allow the ground to thaw.
(j) Tundra:
Tundra is characterized by permafrost, a layer of parentally forge subsoil. Cold temperatures, high winds the short growing season, and humus poor soil limits the plant height.