The tundra ground can only support hardy, low growing plants, such as mosses, heaths and lichens giving it a greenish brown appearance.The lack of soil in a tundra region may be due to erosion from wind and ice. During the Ice Ages more than 10,000 years ago, glaciers scraped any soil leaving only bare rock.Less than 18 inches of soil thaws during the summer.

Located in Northern Europe, Siberia, Northern most part of North America, and a few places in the southern hemisphere.Plains are low, located about 1,000 feet above sea level.

Tundra

Ice forms :

Pingos, hammocks or hummocks, and polygons.

Pingo: is a small circular or oval hill formed when a pool of water under the ground freezes and pushes the soil up and out.

Hammock: is when large blocks of ice meet and one goes over the top of the other and they melt and the ground is uneven.

Polygon: are cracks in the ground that take on geometric shape.

Seasonal frost heaves disrupts root systems preventing support for tall vegetation.Plants are small.They are near to the ground to avoid the strong wind and cold temperatures.Examples of vegetations are lichen and dwarf willow.

Hairy stems help to keep some plants warm.

Plants do not come alive until the summer when conditions are just right for growth.

The growing season is short and can last up to 60 days.

Common plant colors are yellow, orange and red, this helps the plants absorb more heat from the sun.

The soil in the Artic has two layers, the active layer and the inactive layer.The active layer

Ranges from ten inches to 3 feet.About 15% of it is well drained.

The inactive layerCommonly called the permafrost layer.Stays frozen all year.Made of gravel, bedrock, clay or silt.Prevents the water captured in the active layer from draining.Poor in nutrients such as nitrogen and phosphorus.

The above pictures are the Aurora Borealis, more commonly known as the “Northern Lights”. It occurs when energy enters the earth’s atmosphere and creates flashes of light. The next picture is a ray traced JPG image of N. Lights.

                                 

It is the coldest and driest of all the biomes on Earth.In the winter the temperature can reach –50 degrees F. The average temperature in the summer is 30-60 degrees F.The precipitation is less than 10 inches per year.There is very little evaporation, which results in moisture being absorbed into the ground, called permafrost.Average Artic temperature in the summer is 30-60 degrees F.The strong winds can cause “white outs”, which can last for days.

Animals adapt to snowy conditions by hibernating, such as the artic ground squirrel.

This means that they remain in a motionless state, with reduced body function and a lowered body temperature that may be close to freezing.

Animals raise their young quickly in the short summer due to the cold winters.

W olves S n owy O wl s

g ry f a l con s

S econ d ary C on su m ersP red ator

A rti c F ox,

P r im ary C on su m ersL em m in g s

P r im ary P rod u cerP l an ts

Their fur has two layers.

One is long and black protective hair on the outside.

Soft warm underfur (which they shed in the summer) called the qiviut.

Fur can reach lengths of one meter long!

Herbivore (belongs to the deer family.

Eat grass, lichen, and low shrubs.

Stands 1.9-2.3 m, their tails 9-10 cm.

They do not migrate.

MigratorySpends their

summers in the Artic & their winters in the forest at the tundra’s edge.

Some travel over 1200 miles each year.

FurWinter coat is

long and thick which protects them from freezing.

HoovesWide & flat to

allow them easier access over the snow & ice.

Slide Show of the Artic

The following is a slide show of the tundra’s landscape, animals and plants.

So…How does the climate effect the animals and the

plants??I need some volunteers!