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Biotic Processes Operating in Deserts

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Nicholas Mooney

on 18 July 2013

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Transcript of Biotic Processes Operating in Deserts

Biotic Processes Operating in Deserts
Desert Plants
Drought Resistors
# What does this mean?
This means that the plants have adapted to the conditions of drought and have certin features that protect it from the harsh climate.

# Outline these plants methods for desert survival
These plants often have
. deep roots
. thick and heavy leaves or
. thin needle like leaves
. thick trunks
. protection from the sun

# Match and define the correct geographical term & examples.
The Geographical term for this is Xerophyic Plants
Xerophytic Plants
2 Aussie Types
Spinifex grass shrubs grow mostly in the central desert region of Australia and have resisted to the harsh climate by having thin leaves that cannot get burnt by the sun and also have long thin Roth that travel deep in the earths surface.

Agaves are shrubs with long thick leaves that look like weeds. They are very moist and have a powder substance covering them which help to protect the leaves from the sun.

3 Overseas Types
The Cacti family have adapted by collecting water in periods of rainfall and storing it in their hollow branches which are protected by sharp needles

The Bromeliad is a Native American plant that have different coloured flowers depending on what variety it is. In their thick leaves, they store water and use the nutrients to flower.

The Joshua tree is found in Northern America and is common in the Mojave Desert. It stores nutrients in its branches and has needle like leaves that protect it from the sun.
Ephermeral Plants
2 Aussie Types
Banksia Seretta, otherwise known as Old Man Banksia is a plant found in costal deserts where there is much vegetation. The seeds on the plant spread in the hotter months and they spring in cooler months.

3 Overseas Types
Hairy Bittercress, Cardamine hirsuta, is an ephemeral plant native to Europe and Asia, but also present in North America. It is a weed.

Brassica is a type of weed shrub that grows only in the cooler months as its roots are not long enough to capture water

Bluebell Wood is a plant that grows only under the shade of trees or shrubs. It has a light blue-purple colour and is rare in deserts.
Drought Escapers
# What does this mean?
This means that the plants cannot survive the harsh conditions that the desert and droughts have to offer so thay escape during the harsher seasons

# Outline these plants methods for desert survival.
these types of plants have
. light seeds
. short roots
. broad thin leaves
. weed like qualites
. roots above the surface

# Match and define the correct geographical term & examples.
The Geographical term for this is Ephethermal.
Desert Animals
Ship Of the Desert
Camels seem larger than they are because of their thick, woolly fur, which may be all shades of brown, from nearly white to almost black. An Arabian camel's fur is short and helps protect its body from the heat. A Bactrian camel's fur is longer. It may grow about 25 centimetres long on the animal's head, neck, and humps to protect them from the harsh desert sun
A camel has large eyes on the sides of its head.
Each eye is protected by long, curly eyelashes that keep out sand. In the daytime, when the sun is high, the eyes do not allow excessive light in. Glands supply the eyes with a great deal of water to keep them moist. Thick eyebrows shield the eyes from the desert sun
The hump of a camel is mostly a lump of fat. The tough, leathery skin pads on a camel's legs act as cushions when the animal kneels to rest. The camel bends its front legs and drops to its knees
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