Unit 5 Ecology Introduction Relationships exist in order for one or both organisms to get food energy Sunlight is the main source of energy on Earth Section 1 Food ChainsFood Webs Feeding Style ID: 621809
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Slide1
Symbiosis & Food Chains
Unit 5 - EcologySlide2
Introduction
Relationships exist in order for one or both organisms to get food (energy).
Sunlight is the main source of energy on Earth.Slide3
Section 1
Food Chains/Food WebsSlide4
Feeding Style
Producers
Produce their own food; get energy from sunlight
Consumers
acquire energy from other organisms.
Autotrophs
Heterotrophs
Slide5
Types of Consumers
Herbivores
eat
plants
(
cows
)
Carnivores
eat animals
(
snakes
)
Omnivores
eat plants & animals
(
humans)
Detritivores
eat plant/animal remains & other dead matter.
(
vultures, earthworms, maggots…
)
Decomposer
feed on decaying/dead matter; return organic
compunds
back to soil.
(
fungus & bacteria
)Slide6
Detritivore
Omnivore
Carnivore
Herbivore
DecomposerSlide7
Food Chains/Webs
Energy (food) is passed from organism to organism through food chains and food webs.
Food Chain
a series of steps in which organism transfer energy by eating & being eaten.
Food Web
links all the food chains in a ecosystem together.Slide8
Trophic Levels
Trophic
Level
– each step in a food chain or food web.1st
trophic level is always a producer (autotroph
)
Plants, algae, plankton
2
nd
trophic levels and up are consumers. (
heterotroph
)Slide9
Trophic Levels
A
primary consumer
is the first consumer of a food chain (consumes the producer)second trophic level (the producer is always the first)
A secondary consumer is the second consumer of a food chain (consumes the primary consumer)
third
trophic
level
.
A
tertiary consumer
is the
third consumer of a food chain (consumes the
secondary consumer)Fourth trophic level.Slide10
Section 2
RelationshipsSlide11
Relationships
I.)
Symbiosis
2 or more species live together in a close, long-term association.
II.)
Predation
one organism feeds on another; one benefits and one is hurt (may or may not be kill)Slide12
Symbiosis
Mutualism
: both organisms benefit
Ex. Shark & remora/ herd animals & birds/goby fish & shrimp+, +Slide13
Symbiosis
Commensalism
: one organism benefits and the other is neither harmed nor helped.
Ex. Sea anemone & tropical fish+,OSlide14
Symbiosis
Parasitism
: one organism feeds on & usually lives on or in another organism.
Ex. Ticks, mosquitoes, tapeworm, heartworm, +, -Slide15
Predation
II.)
Predation
: one organism feeds on another; one benefits and one is hurt (may or may not be kill)Ex. Snakes – predator / mice prey