- There are many types of ecosystems on earth.
- Major classes of relatively contained ecosystems are called Biomes.
- There are 3 Major classes of ecosystems
- Freshwater Ecosystems
- Terrestrial Ecosystems
- Ocean Ecosystems
- Relatively small in area ~ 1.8% of earth's surface
- Support many species of life including fish, amphibians, insects and plants.
- Base of food-web is found in freshwater Plankton (small microscopic organisms)
- Many & diverse types of ecosystems. There are seven major types.
- Location usually dependent on the latitude of the area, and amount of precipitation
types & locations of biomes
- Tropical Rain Forest
- Precipitation - 250cm/year
- Little temp. variation/abundant moisture
- Contains more species than other biomes.
tropical rain forest
- Savannas
Open, widely spaced trees, seasonal rainfall
Parts of Africa, South America & Australia
Dry, sparce vegetation; scattered grasses
Parts of Africa, Asia, Australia, North America
Desert
- Temperate Grasslands Precipitation: 10-60cm/year Rich soil; tall dense grasses Central North America; Central Asia
- Deciduous forests 75-250cm/year Warm summers, cool winters Europe; NE United States;Eastern Canada
- Coniferous forest: 20-60cm/year Short growing season, cold winters. Northern Asia;Northern North America
- Tundra
Temperate/Deciduous forest
Coniferous Forest
Open; wind swept; dry; ground always frozen
Far northern Asia; Northern North America
Tundra
Ocean Ecosystems:
- Very large amount of Earth is covered by ocean (~75%)
- 40% of all photosynthesis occurs in oceans.
- 3 types of oceanic ecosystems
- Shallow ocean waters
- Deep ocean water
- Deep ocean surface.
- Photosynthetic plankton is base of food chain.
- Only occurs in Deep ocean surface & Shallow ocean ecosystems
- No photosynthesis can occur in deep ocean because light cannot penetrate deeply into water.
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