Transcript FOOD CHAINS & FOOD WEBS

FOOD CHAINS & FOOD
WEBS
FOOD CHAINS vs. FOOD WEBS
FOOD CHAIN –
Diagram that shows how
energy flows from 1
organism to another in an
ecosystem.
FOOD WEB –
Diagram that shows the
feeding relationships
between organisms in an
ecosystem.
PRODUCERS
• Makes its own food by:
– Photosynthesis – uses sunlight
– Chemosynthesis – uses chemicals
• VERY IMPORTANT: The bottom of a food
chain and the anchor in a food web.
• Example – phytoplankton, algae, plants,
some bacteria who live around hydrothermal
vents.
CONSUMERS
• Cannot make their own food, must
eat other producers, consumers, or
decomposers.
• Examples – humans, krill, sharks,
fish, zooplankton, lions, birds.
DECOMPOSERS
• Cannot make their own food; eat
dead producers, consumers, or
decomposers.
• Break down dead stuff and recycles
it.
• Examples – bacteria, sea urchins,
starfish, sea cucumbers, vultures,
some insects.
TERRESTRIAL ORGANISMS –
Organisms that primarily live on land
or the air.
AQUATIC ORGANISMS – Organisms
that primarily live in water.
Aquatic
food web
Groups of Marine Organisms
• Plankton or drifters, drift in the surface or
sunlight zone
– Phytoplankton – plant-like
– Zooplankton – animal-like
• Nekton – swim in the open
ocean, like whales dolphins.
• Benthos – live on the ocean
floor, like crabs, starfish, corals.
Food web game
1. Play one round with your table partner.
– Start with the Sun in the center. Why?
2. Once you build a food web, let me know
to come check it.
3. Once I approve, please draw it in your
NB. Make sure the arrows are pointing
toward an organism that is eating.
4. Answer the questions.
5. Color terrestrial organism brown and
aquatic organisms blue.