Tundra
· Located near the North Pole
· coldest and driest of all biomes
· long cold winters, short cool summers
· Has a layer of permanently frozen soil - permafrost
· Receives very little rainfall
· receives very little sunlight due to the position of the Sun in the sky
· During the very short summer (6-10 weeks), top layer of the soil thaws just long enough to allow some plants to grow
· Plants are small and grow close to the ground; plants have shallow root systems – lichens, mosses, small shrubs
· Animals include musk ox, caribou, arctic hares, polar bear, arctic fox
Taiga (coniferous forest)
· Largest biome in the world
· Has long cold winters and short, mild, wet summers.
· Made up of coniferous forests – trees that have cones or needles – pines, spruces and firs – evergreen trees
· Soil is not very fertile because there are no leaves to decompose
· has less diversity in plant life
· Animals include jays, moles, deer, moose, elk, snowshoe hare, grizzly bear, wolves
Temperate Deciduous Forest
· Contains trees that lose their leaves each fall
· Has 4 seasons
· Lots of rain throughout the year – second most rainfall of all biomes
· Has very fertile soil
· Deciduous trees – trees that lose their leaves seasonally - such as red maple, dogwood, oak, sugar maple, beech, elm, hickory
· Animals include black bears, squirrels, cardinals, turkeys
Grasslands
· found in warm and temperate areas that receive some rainfall
· have some of the darkest, richest soils in the world
· most important plants are grasses
· The amount of rain is not enough to grow tall trees and produce a forest, but it is enough to not form a desert.
· Usually flat or has gently rolling hills.
· Usually located between forests and deserts.
· Also called prairies, savannahs, plains and pampas
· North American animals include bison, prairie dogs, coyotes, deer. African animals - elephants, rhinoceros, hippopotamus, giraffes, lions
Desert
· Very little rain – 10 inches or less a year
· Very hot during the day; cold at night
· Soil is dry, there is little to no surface water and evaporation is high
· covers a fifth of the earth’s surface
· There are both hot and cold deserts in the world – Antarctica is the largest desert in the world
Tropical Rainforests
· found close to the equator
· rain falls all throughout the year
· receives the most rainfall of all biomes
· has the most biodiversity –more species of plants and animals than any other biome
· home to 50% of the world’s plant and animal species
· soil is low in nutrients – because of millions of years of rain and weathering, nutrients have been washed out of the soil
· decomposition rate is very fast – high humidity and warmth encourage rapid decay of dead plant and animal material