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Australian Desert Ecosystem

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Bio ten

on 24 July 2013

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Transcript of Australian Desert Ecosystem

Australian Desert Ecosystem
Microhabitat
Biotic factors
Human influences
Habitat
Railway: The Ghan
Decomposers
Producers


Consumers


Abiotic factors
Survival of organisms with these abiotic factors
Microhabitat
Mining: Argyle diamond mine
Predation
Mutualism
Symbiosis
Is the space which animals live
Living and non-living components of organisms
Living things and physical factors such as humidity, wind and the amount and direction of sunlight
small area in habitat
Has abiotic environmental factors

temperature & sunlight= differ from larger habitat
Organisms which live in
There are ten deserts in Australia: the Great Victoria Desert, Great Sandy Desert, Tanami Desert, Simpson Deset, Gibson Desert, Little Sandy Desert, Strzelecki Desert, Sturt Stony Desert, Tirari Desert, Pedirka Desert.
Only 3% of the Australian population live in the desert.

Sunlight
Temperature
Soil
Water
Rainfall
Salinity
Sunlight
Survival of organisms with these abiotic factors
Survival of organisms with these abiotic factors
Survival of organisms with these abiotic factors
Temperature
Soil/ Salinity
Thory dragon feeding on ants
Long-term relationship between two or more different biological species
Mycorrihiza and any desert plant
Mutualism
Mycorrihiza and any desert plant
Mutualism
Cacti flower and moths/bees
Parasitism
Desert mistletoe and desert ironwood
Parasitism
Parasitism
Sandalwood and Acacia acuminata
Commensalism
Lichen growing on tree bark
Commensalism
Dingos resting in old rabbit warren
FOOD
Competition
A small area within a habitat that usually has abiotic environmental factors such as temperature & sunlight which differ from those found in the larger habitat.
SPACE/SHELTER
Dingos and rabbits
Tourism : Yulara Resort

Major factors

clearing

construction
Roads and pathways
off road 4 wheel drive
disturbance
destruction
- tourism
- railway networks
-mining industry
Darwin-
Alice Springs-
Adelaide
2979 km long
large area, great lengths cleared
disturbance to animals' activites

pollution into the atmosphere
modification to ecosystem
sand, dust in atmosphere
open pit mine
roads and pathways
chemical alteration in soil
reduction of ecosystem area
unable to rehabilitate, too much damage
area of many kilometres
dug hundreds of metres below surface
cause of change an altered abiotic or biotic factor ?
Australian desert ecosystem food web
2nd order carnivore
Thank you :)
1st order carnivore
Herbivores
Producer
Detritivores
Earthworms
Abiotic factor
-habitat: destruction and modification
-soil: chemical alteration and physical damage
-atmosphere: more polluted, altered
Biotic factor
-vegetation: absence or close to none
- animals: absence or close to none

Desert bighorn sheep
Kangaroo Rat
Water/Rainfall
PupFish
Cactus
Lesser Bilby
Desert Bandicoot
Bilby and Perentie
Organisms have to struggle against water shortage and increased evaporation
Cactus
Plants and animals have to struggle to keep cool and at a suitable temperature
Organisms require a source of water in order to survive
High salinity in water and soil effects the survival of organisms not suited to this
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