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Food Chains Food Webs

TEK 8.11A / 7.10
by

Natosha Daniels

on 16 February 2012

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Transcript of Food Chains Food Webs

Food Chains
Producers
The Sun!
Primary
Consumer
Secondary
Consumer
Herbivore
Carnivore
-only eats plants
Omnivore
-only eats meat
-eats both plants
and animals
-Make their own food
Autotrophs
-Cannot make their
own food
Heterotrophs
Scavenger
Decomposer
-Eats Producers
breaks down dead/
decaying matter
vs.
Food Webs
EVERYTHING!!!!
depends on the sun
-Eats other
consumers
-Eats dead stuff
Food Chain-shows how energy flows by indicating what organism is eaten by another organism.
Food web-shows how all organisms in a particular ecosystem are related, and how they depend on each other to survive.
Energy Pyramid-places organisms into
trophic levels
energy
decreases
as you travel
up
the pyramid. (each level only gets about
10%
of the energy)
Energy is
greatest
at the
bottom
because
sun
is supplying energy to plants for photosynthesis.
Relationships!!
(not this kind)
predator vs prey
-
carniverous killer
vs
-
meal of the carniverous killer

(aka the victim)
-one benefits,
one is not harmed
commensalism
Mutualism
-both organisms benefit
from each other.
red-billed oxpeckers feed
on parasites on the impala.
Parasitism
-one organism benefits
the other is harmed.
-cuckoo bird shoves
robin's eggs from nest
so the mother raises/feeds the cuckoo bird.
Arrows
ALWAYS
point in the direction of the
ENERGY FLOW
.
Why do you need biodiversity within a food web?
How many producers do you see in this food web?
What would happen if a catastrophic event wiped out all of the producers?
Is there enough diversity to sustain this web without the grass?
Symbiosis- ecological relationships between 2 or more different species.
(more like
this...)

(write this in the summary section of your notes)
Cattle egrets and livestock
-eat bugs stirred up by the cattle eating the grass.
N.Folarin 2012
Food Chains and Webs
SYMBIOSIS =
Full transcript