2. An ecosystem consists of the biological
community that occurs in some locale, and
the physical and chemical factors that make
up its non-living or abiotic environment
3. There are 3 Major classes of ecosystems.
1. Freshwater Ecosystems
2. Terrestrial Ecosystems
3. Ocean Ecosystems
4. Relatively small in area ~ 1.8% of earth's
surface
Support many species of life including fish,
amphibians, insects and plants.
Base of food is found in freshwater Plankton
(small microscopic organisms)
5. Many & diverse types of ecosystems. There
are seven major types.
Location usually dependent on the latitude of
the area, and amount of precipitation.
8. Precipitation - 250cm/year
Little temp. variation/abundant moisture
Contains more species than other biomes.
9.
10. Precipitation 90-150cm/year
Open, widely spaced trees, seasonal rainfall
Parts of Africa, South America & Australia
11. Precipitation 20cm/year
Dry, sparce vegetation; scattered grasses
Parts of Africa, Asia, Australia, North America
12.
13. Precipitation: 10-60cm/year
Rich soil; tall dense grasses
Central North America; Central Asia
14. 75-250cm/year
Warm summers, cool winters
Europe; NE United States;Eastern Canada
15.
16. 20-60cm/year
Short growing season, cold winters.
Northern Asia;Northern North America
17.
18. 25cm/year
Open; wind swept; dry; ground always frozen
Far northern Asia; Northern North America
19.
20. Very large amount of Earth is covered by
ocean (~75%)
40% of all photosynthesis occurs in oceans.
3 types of oceanic ecosystems
21. 1. Shallow ocean waters
2. Deep ocean water
3. Deep ocean surface.
◦ Only occurs in Deep ocean surface & Shallow ocean
ecosystems
◦ No photosynthesis can occur in deep ocean because
light cannot penetrate deeply into water.