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POS
Interactions and interdependencies,
Illustrate how life-supporting environments meet the
nee of living things for nutrients, energy sources,
moisture, suitable habitat, and exchange of gases
Analyze an ecosystem to identify biotic and abiotic
components, and describe interactions among these
components
Describe examples of interaction and
interdependency within an ecosystem (identify
examples of dependency between species, and
describe adaptations involved)
Unit A:
Interactions in Ecosystems
Needs of all living things
Adaptations
Interactions in Ecosystems
An ecosystem is
Eco-place on earth where interactions
between non-living and living can occur
Ex. Lake, desert, rotting log
Ecologist-person who studies
Ecology-study of
An organism interacts with the
Abiotic and Biotic components of its’
ecosystem
Abiotic- non living
Biotic- living
Ex. Air, water,
rocks, climate,
temperature
Bacteria, plants,
fungi, animals
*even dead
What are
“antibiotics” then?
To count as a living thing:
Take in nutrients
Exchange gases
Move
Reproduce
Respond to stimuli
(feel)
grow
Requirements of all living
things…
Energy (food)
Water
Habitat (shelter)
Gas exchange (cellular respiration and
photosynthesis)
Energy
Food Sources
Plants: Sunlight + nutrients from soil
http://www.youtube.com/watch?v=wj8TGhcCnxs&safety_mode=true&persist_safety_mode=1&safe=active
Bacteria, Fungi: they will decompose
organic matter (living things)
Animals:
Carbohydrates
lipids
Protein
Vitamins + minerals
Can you name some examples of each?
Water
Is needed for:
chemical reactions
transporter of nutrients and
oxygen, waste (blood)
air-conditioner through
perspiration
Habitat
All living organisms need a place to
live, and often, require protection from
the elements/predators
Water source, food source
Do humans have any impact on the
habitats of other species? Give an
example.
Gas Exchange
Photosynthesis (song, youtube)
Carbon dioxide + water + sunlight ->
oxygen + sugar
http://www.youtube.com/watch?v=C1_uez5WX1o&safety_mode=true&persist_safety_mode=1&safe=active
Cellular respiration
Sugar + oxygen -> energy + carbon
dioxide + water
Animals, plants at night
Adaptations for gas exchange
Lungs
ex. Humans, dogs, horses, whales
Stomata
Ex. plants
Skin
Ex. worms
Gills
ex. Fish
Adaptations
Genetically inheritable physical
characteristics that help an organism survive
in a given environment
Transportation
feet, hooves, fins, wings
Defense
claws, teeth, shell, blubber, camouflage, quills
Eating
bird beaks, teeth
Interactions in Ecosystems
Symbiosis is the close interaction of
two species
Symbiosis
Mutualism
Parasitism
Commensalism
Mutualism
Relationship where
both species benefit
+, +
Bees/birds pollinate flowers, flowers offer
food source for bees
Can you spot the adaptations?
Parasitism
One organism benefits while the other
is harmed
Parasite +, host -
Mosquitoes take our blood, we get itchy
Can you spot the adaptations?
Commensalism
One species benefits while the other is
indifferent
Orchids use trees for support, trees neither
suffer nor benefit
Parasitism-fleas + dogs/cats
Commensalism-barnacles
Mutualism-shark + remora
Mutualism-shrimp + goby fish
Mutualism-clown fish + anemone
Brainpop
Ecosystems
Carnivorous plants
Cellular respiration
symbiosis
Humans and the environment
photosynthesis