Have your homework out to be stamped'

1
9/27/06

• Have your homework out to be stamped.
• Homework due tomorrow
• do page 2 Also, In textbook p. 62 -63 1-9
  17-22 answers
• Cycles Foldable due Friday can use on quiz!
• Get a sheet of yellow paper and diagram sheet
  from Lab table 1
• Check Grade Sheet for any missing work TURN IT
  IN!
• Get your logbook ready for notes
• Remember
• Ch 2 quiz on Friday
• Invasive Species XC due tomorrow
• Magazine Article reviews due Friday
• I WILL NOT BE HAVING OVERTIME ON THIS FRIDAY

2
Food chain
PRODUCERS? CONSUMERS? PRIMARY? SECONDARY? TERTI
ARY? First-order? Second-order?
Third-order? Herbivores? Carnivores? Omnivores?
TROPHIC LEVELS
Trophic levels
3
Define an autotroph.

• Use light energy to make energy-rich complex
  compounds from simple compounds food!
• A type of Anabolic reaction
• Producers
• By photosynthesis

• Plants
• Algae
• phytoplankton
• Some protists
• Some bacteria

4
Define a heterotroph

• Primary consumers
• First-order consumers
• Herbivores
• eat producers
• Secondary Consumers
• Second-order consumers
• Eat primary consumers
• Carnivores predators? prey?
• Tertiary Consumers
• Third-order consumers
• Eat secondary consumers
• Top carnivores
• Omnivores from 2 or more levels

• Cannot make their own food
• Must feeds on other organisms
• Consumers
• eat autotrophsproducers
• Or other heterotrophs
• Both

5
Decomposers

• Break down complex compounds into simple
  compounds
• A type of Catabolic reaction
• Dead and decaying plants and animals
• To be reused
• To soil or atmosphere or water

• Bacteria
• Fungi
• Protists

6
PRODUCERS
PRIMARY CONSUMERS
Secondary Consumers
Tertiary Consumers
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8
Define a food web

• A group of interrelated food chains
• All the possible feeding relationships at each
  trophic level of an ecosystem

The Food web
9
Color the arrows from each of the following to
the next level Producers green Primary
yellow Secondary red Tertiary-
blue Quaternary- orange Decomposers
brown
10
What is the Law of Conservation of Energy?

• Matter can never be created or destroyed but only
  transferred and transformed
• When energy is used some is always lost as heat
  that cannot be used or recaptured
• Energy is used in process of cellular respiration
  process that captures energy from food by
  heterotrophs

Energy flow
11
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12
SUN
ENERGY
NUTRIENTS
HEAT energy lost cannot be used
Energy pyramid
decomp
ENERGY PYRAMID
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Energy and numbers
14
10 kilotons
amount
Amount of mass at each trophic level
100 kilotons
1000 kilotons
10,000 kilotons
100,000 kilotons
biomass
biomagnify
Human impact
15
Biological Magnification Build up of toxins as
they are passed through the food chain