Transcript Ecosystems and Biomes

Ecosystems
Living things
+ Nonliving things
ECOSYSTEM
What is an ecosystem?
• Ecosystem is a system of living
things that interact with each
other and with the physical world
(nonliving things).
• A Biome is a collection of related
ecosystems.
Main Ecosystems:
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Desert
Rainforest
Ocean
Taiga
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Tundra
Chaparral
Grassland
Temperate
Forrest
However……..
• An ecosystem can be as large as the
Sahara Desert, or as small as a puddle!!!
Ecosystems have Living
and Non-living Parts
• Biotic (Living)
Features
– Animals
– Plants
– Bacteria
– Fungus
• Abiotic (Non-living)
Features
– Rocks
– Minerals
– Air
– Water
What makes ecosystems different?
Amount of water
1
Amount of sunlight
2
3
Type of soil
What causes ecosystems to change?
Natural causes:
1
Drought
Disease
3
2
Fire
4
Overpopulation
What causes ecosystems to change?
Changes caused by humans:
1
Water pollution
2
Air pollution
3
Land pollution
4
Construction
How can humans help to prevent
changes in ecosystems?
1
Use resources wisely
2
Laws that control pollution
3
Clean up litter
4
Keep rivers and lakes clean