DO NOW:
1. Find
yourself on
the MAP
schedule.
2. Do the
expert
questions
packet
When a question says to “draw”
a food web or food chain
It means this…..
Acorn  mice  tick
It doesn’t mean this….
How do abiotic factors affect an ecosystem?
Give 2 examples!
• Temperature- affects which
animals can live in an
ecosystem. Not all animals can
survive at certain temperatures.
• Water- and its abundance or
absence affects whether
certain plants can grow easily
and the available supply for
other organisms.
• Soil – provides nutrients for
producers
Complete the chart
Producer
Def. Using
sunlight
to make
own food
Ex.
Consumer
Herbivore
Eats
producers
Fern, tree, Rabbit,
shrubs
guinea pig
Consumer
Carnivore
Consumer
Omnivore
Decomposer
Animal
eater
Eats a
variety of
meats and
vegetables
Dog, lion
humans
Gets
energy by
breaking
down dead
organisms
Bacteria,
fungi, algae
Explain the importance of decomposers in an
ecosystem
• Decomposers remove energy from dead
organisms and produce materials that can be
used by producers. They are natures
recyclers
Describe how producers, consumers and
decomposers are linked in a food chain
• Consumers feed on producers and other
consumers. Decomposers feed on producers
and other consumers after they are dead.
Describe how energy flows though a food web
• Energy flows from producers to consumers
to decomposers.
• More energy is available to producers than
to consumers
Draw 2 food chains and illustrate how they
link together to form a food web
2 food chains:
Grass  rabbit  snake  owl decomposers
Flowers  rabbit  owl  decomposers
Food web:
snake
grass
flowers
rabbit
decomposers
owl
Explain the relationship between carrying
capacity and limiting factors
• Carrying capacity is the maximum number
of individuals of a species that can live in
an environment.
• Limiting factors are resources that affect
the numbers of a given population.
• Limiting factors affect the carrying capacity
because when a population grows larger
than its carrying capacity, limiting factors
in the environment (like water supply,
disease, etc) will cause individuals to die
off or leave. Then the population will
decrease and return to the carrying
capacity.
Compare co evolution with symbiosis
• Co evolution happens when a symbiotic relationship
occurs over a very long period of time and changes
the structure or behavior of the organisms involved in
the relationship. The change happens for a positive
reason and helps both of the organisms.
• Symbiosis is a relationship between two organisms
but does not necessarily cause a change in the
organisms.
Complete the chart
Symbiotic
Relationship
Mutualism
+ +
Definition
Relationship when both
member of the relationship
benefit
Relationship when one
Commensalism member of the relationship
+ 0
benefits and the other one is
unaffected (does not care)
Parasitism
+ -
Example
African
Crocodile (+)
& Plover (+)
Shark (0) &
Remora (+)
Relationship where one of the Tic (+) &
members benefits and the
mammal (-)
other is harmed