Download ST-PP 1Ch.3(16)Energy

Chapter 3
Ecosystems
and Energy
Primary Themes
1. Distinguish ecological levels
2. Define and explain energy
3. Laws of thermodynamics
4. Reactions for photosynthesis & respiration
5. Explain pyramids & webs in terms of energy,
biomass, and relationships
6. Describe life in terms of GDP and NPP
What is Ecology?
Ecology:
Aldo Leopold
The last word of ignorance is
the man who says of an animal
or plant: What good is it?
Spheres of Organization
Landscape Ecology: encompasses larger
area and several ecosystems
The Energy of Life
Potential vs. Kinetic Energy
All energy forms summed into two forms
Types of Energy
1. Chemical - energy stored in bonds
The Energy of Life
1st Law deals with quantity of energy
2nd Law with quality of energy
The Energy of Life
Thermodynamics – the study of energy
and its transformations.
The Energy of Life
Photosynthesis & reversed?
Life without Sunlight
Hydrothermal Vents or Black Smokers
• Chemosynthesis
•Bacteria
•Shrimp
• Tube Worms
•https://www.youtube.com/watch?v=B
XGF3XS-yAI
Chemosynthesis
An extremophile is any microbe that thrives in extreme
conditions of temperature, pressure, salinity, or concentrations
of hostile chemicals.
Extremophiles commonly belong to the kingdom Archaebacteria.
Hydrogen sulfide chemosynthesis
6{CO2}+6{H2O}+3{H2S} → C6H12O6+3{H2SO4}
The Flow of Energy Through
Ecosystems
Producers, Consumers, and Decomposers
1.
2.
3.
4.
5.
Algae
Invertebrate Larva
Fish
Bigger Fish
Otter / Osprey
The Path of Energy Flow – Food Chains
Producers:
1. Light Reflected
Cellular Respiration
1. Life – growth/repro.
Consumers:
1. Respiration
2. Motion
3. Incomplete digestion
4. Not all Edible
The Path of Energy Flow
Ecological Pyramids
Pyramid of Numbers
Pyramid of Biomass
The Path of Energy Flow
Ecological Pyramids
Pyramid of Energy
Ecosystem Productivity
Net Primary
Gross Primary
Productivity = Productivity
Plant cellular
respiration
The Path of Energy Flow
Ecosystem Productivity