Unit 4: Ecosystems
APES Period 4
Terrestrial and Aquatic Biomes
Karis Heidebrecht
What is a Biome?

Definition: A major biological community, such
as a grassland or desert, characterized chiefly
by the do...
Terrestrial Biomes Include
tropical rainforest, temperate rainforest,
deciduous forest, taiga, savanna,temperate
grassland...
Aquatic Biomes Include
estuaries, oceans, lakes, rivers, ponds,
coral reefs and wetlands.
Energy Flow Through Ecosystems
McKenna
Biogeochemical Cycles
Daniel Monsalve
Carbon Cycle
Nitrogen Cycle
Nitrogen makes up 78% of the atmosphere it is also an essential nutrient for all
life.
Nitrogen fixation - ...
Effects of Excess Nitrogen
The burning of fossil fuels and the use of
manufactured fertilizers increase nitrogen on
land i...
Phosphorus Cycle

Sulfur Cycle

Phosphorus Cycle Animation
Water Cycle
Population Dynamics
Geoffrey Ashton
The black bar was here when I got here I swear!
*Black Bar*
Natural Ecosystem Change
Michaela Brost
Succession

The process by which one natural community
changes into another over a time scale of
years to centuries is cal...
Primary Succession

Referring to colonization of a newly exposed
landform, such as sand dunes or lava flows
after a volcan...
Secondary Succession

Describing the return of an area to its natural
vegetation following a disturbance such as fire,
tre...
Autogenic Succession

Change driven by the inhabitants of an
ecosystem, such as forests re-growing on
abandoned agricultur...
Allogenic Succession

Change driven by new external geophysical
conditions such as rising average temperatures
resulting f...
Key Terms
Victoria Owen
Key Terms (Continued) Maribeth Villanueva
Adaptation- make (something) suitable for a
new use or purpose; modify.
Adaptive...
Age structure- A population pyramid, also
called an age pyramid or age picture diagram,
is a graphical illustration that s...
◊
Age distributions- the distributions of age in a
population
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
Unit 4  Ecosystems
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Unit 4 Ecosystems

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Unit 4 Ecosystems

  1. 1. Unit 4: Ecosystems APES Period 4
  2. 2. Terrestrial and Aquatic Biomes Karis Heidebrecht
  3. 3. What is a Biome? Definition: A major biological community, such as a grassland or desert, characterized chiefly by the dominant forms of plant life and the prevailing climate.
  4. 4. Terrestrial Biomes Include tropical rainforest, temperate rainforest, deciduous forest, taiga, savanna,temperate grasslands, alpine and tundra.
  5. 5. Aquatic Biomes Include estuaries, oceans, lakes, rivers, ponds, coral reefs and wetlands.
  6. 6. Energy Flow Through Ecosystems McKenna
  7. 7. Biogeochemical Cycles Daniel Monsalve
  8. 8. Carbon Cycle
  9. 9. Nitrogen Cycle Nitrogen makes up 78% of the atmosphere it is also an essential nutrient for all life. Nitrogen fixation - Most organisms can’t use atmospheric oxygen, but certain bacteria transfer it into other compounds like ammonia (NH4). Ammonia can then be used as a source of nitrogen for other organisms. Lightning also fixes a small amount of nitrogen. Assimilation - Nitrogen that is fixed can then be used by plants where it is then transferred to animals who eat the plants. Nitrification - Is the process of turning ammonia into nitrates or nitrites. It is carried out by b acteria. Denitrification - Other bacteria take organic nitrogen and nitrates and turn it back into gaseous nitrogen.
  10. 10. Effects of Excess Nitrogen The burning of fossil fuels and the use of manufactured fertilizers increase nitrogen on land in the atmosphere and in oceans. Ammonia (NH3) in the atmosphere has tripled from human activity. This has led to water and air pollution and in some cases acid rain. Nitrogen Cycle Video
  11. 11. Phosphorus Cycle Sulfur Cycle Phosphorus Cycle Animation
  12. 12. Water Cycle
  13. 13. Population Dynamics Geoffrey Ashton
  14. 14. The black bar was here when I got here I swear!
  15. 15. *Black Bar*
  16. 16. Natural Ecosystem Change Michaela Brost
  17. 17. Succession The process by which one natural community changes into another over a time scale of years to centuries is called succession. Succession represents a natural transition from r- K-selected species.
  18. 18. Primary Succession Referring to colonization of a newly exposed landform, such as sand dunes or lava flows after a volcanic eruption.
  19. 19. Secondary Succession Describing the return of an area to its natural vegetation following a disturbance such as fire, treefall, or forest harvesting.
  20. 20. Autogenic Succession Change driven by the inhabitants of an ecosystem, such as forests re-growing on abandoned agricultural fields.
  21. 21. Allogenic Succession Change driven by new external geophysical conditions such as rising average temperatures resulting from global climate change.
  22. 22. Key Terms Victoria Owen
  23. 23. Key Terms (Continued) Maribeth Villanueva Adaptation- make (something) suitable for a new use or purpose; modify. Adaptive trait- a trait with a current functional role in the life history of an organism that is maintained and evolved by means of natural selection.
  24. 24. Age structure- A population pyramid, also called an age pyramid or age picture diagram, is a graphical illustration that shows the distribution of various age groups in a population, which forms the shape of a pyramid when the population is growing
  25. 25. ◊ Age distributions- the distributions of age in a population

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