Ecosystems and the Physical Environment
Ecosystems and the Physical Environment
I. Biogeochemical Cycles
A. The Hydrologic Cycle
1. Affects all other cycles
2. Processes:
a. Precipitation/Evaporation/Transpiration
b. Run-off
c. Infiltration/Percolation
2. Human influence:
B. The Carbon Cycle
1. Photosynthesis / Respiration
2. Carbon sinks:
3. Human Influence:
C. The Nitrogen Cycle
1. Bacteria convert atmospheric nitrogen to a usable form
2. Steps:
a. Nitrogen fixation
b. Nitrification
c. Assimilation
d. Ammonification
e. Denitrification
3. Human Influence:
D. The Phosphorus Cycle
1. Land ( Ocean ( Land
2. Long-term vs. Short-term
3. Phosphorus Sinks:
4. Human Influence:
II. Weather and Climate
A. Weather
B. Climate
1. Factors influencing
a. Local
b. Global
2. Microclimates
III. Solar Radiation
A. Sun’s energy makes life possible
B. Albedo
C. Temperature Variation
1. Latitude
2. Seasonal Changes
IV. The Atmosphere
A. Composition
B. Functions:
C. Layers:
1. Troposphere
2. Stratosphere
3. Mesosphere
4. Thermosphere
5. Exosphere
D. Atmospheric Circulation
E. Surface Winds
1. Cause
2. High pressure ( Low pressure
3. Coriolis effect
4. Prevailing Winds
V. The Global Ocean
A. Four sections
B. Patterns of Circulation
1. Currents
2. Gyres
C. Vertical Mixing of Ocean Water
1. Density
2. Ocean Conveyor Belt
D. Ocean Interactions with the Atmosphere
1. Strongly linked
2. El Nino- Southern Oscillation (ENSO)
a.
b.
c.
d.
e.
VI. Geological Processes
A. Plate Tectonics
1. Tectonic plates
2. Plate Boundaries
a. Convergent
b. Divergent
c. Transform faults
B. Geologic and Natural Hazards
1. Earthquakes
2. Volcanoes
3. Landslides
4. Tsunamis
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