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Who's who in an ecosystem?

Intro to ecosystems What is an ecosystem, energy in an ecosystem
by

teretha mcmillion

on 31 January 2013

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Transcript of Who's who in an ecosystem?

Catalyst: Identify an ABIOTIC factor
that can be found in a marine environment?
a. Seaweed b. Coral reef
c. Water d. Barnacles Today is January 31, 2013
Today's Lesson: Who's who in an ecosystem? Content Objectives: S.W.B.A.T NC Essential Standards: 2.1.3
Explain various ways organisms
interact with each other and with
the environment Language Objectives: S.W.B.A.T Identify, describe and discuss abiotic/biotic factors in an ecosystem.
watch a video and discuss the interactions of organisms in the video.
Identify and define key terms related to ecology
label trophic levels in an ecological pyramid Essential Questions: 1. Explain the structure and function of ecosystems.

2. Explain how energy is lost and stored in an ecosystem.

3. Explain how matter is recycled in an ecosystem. THE LION KING Key Terms

Abiotic Decomposer
Biotic Law of thermodynamics
Consumer 10% Rule
Producer Biomass
Producer Consumer
Ecology Decomposer
Ecosystem Agenda:
Catalyst
Key Term Learning Log
The Lion King Activity
Workshop: Who's who in an Ecosystem
Guided practice: Revisit The Lion King
Independent Practice: Price of Butter Activity What is an ecosystem?

Interacting groups of organisms and their physical environment Who's who in an ecosystem? Biotic factors:
living things
Ex: tree, bird, tiger
Abiotic factors:
nonliving things
water, oxygen, soil Energy in an Ecosystem
ENERGY IS LOST
MATTER IS RECYCLED! Where are the Producers found? Energy in an Ecosystem:
All energy comes from the sun!!
How is it converted to useful energy? Organisms in an ecosystem:
Producers
Consumers
Decomposers ENERGY IS LOST MATTER IS RECYCLED! IN AN ECOSYSTEM:
ENERGY IS LOST
MATTER IS RECYCLED! Producers:
Use the sun (photosynthesis)!
Autotrophs
make thier own food
ex: grass, flowers, trees Decomposers
return organic materials to to environment by breaking down dead oganisms
ex: bacteria, fungi, worms Consumers:
Heterotrophs
Can't make thier own food
Must "EAT"
depend on producers for energy Types of Consumers:
Omnivores
eat both plants and animals Types of Consumers:
Carnivores
secondary consumers
eats other animals
ex: lions, tigers, bears... Types of Consumers:
Herbivores
primary consumers
eat only plants
ex: rabbit In an Ecosystem...
ENERGY IS LOST.
MATTER IS RECYCLED! ENERGY ONLY GOES THROUGH AN ECOSYSTEM ONE TIME!! Most energy Least Energy Use the food web to answer the following questions:
1. If we start with 10,000 units of energy in the producer chain, how much energy is left for the tertiary consumer?

2. If 500 units of energy is available for the secondary consumers, how much energy is available for the other levels in the food chain? The 10% Rule Its difficult to measure energy so we measure...
BIOMASS = the weight of each trophic level. As an organism lives, it uses energy to breathe, move, reproduce etc (STERNGRR)
So, all the energy they get when they eat, CAN’T be passed to the next level
Only 10% of the energy actually makes it to the next trophic (enegy)level How much energy is lost?
The 10% Rule Most Energy Least energy 1st Law:
Energy can’t be created or destroyed…on converted from the sun to useful energy

2nd Law:
When energy is converted some useful energy is lost
As one organism eats another only some of the useful energy is transferred Law of Thermodynamics Example Eco = environment
System = group of things working together
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