Ecosystems Study of living and nonliving things
interacting
Interactions/(examples)
include:
• Plants providing food for organisms.
• Plants giving off oxygen and taking in
carbon dioxide.
• Decomposers breaking down nitrogen.
• Water evaporating and condensing to form
clouds and rain.
• Define evaporation:
• Define condensation:
Biotic means living.
• Biotic factors include
all living plants,
animals, fungi,
bacteria, and protists.
These are also the six main
kingdoms of living things.
Name those kingdoms here:
Give an example of a biotic
factor.
Abiotic means nonliving.
• Examples include temperature, air, soil, water,
minerals, sunlight, and land.
Give an example of an abiotic
factor.
Parts of an environment
• 1. Individual (one
organism)
• 2. Population - same
species living together.
• 3. Community –
different populations
in the same
environment.
ECOSYSTEMS
• An ecosystem can be
as large as a forest or
as small as a leaf.
• Abiotic factors
(temperature
especially) determine
what lives there.
• 4. A habitat is a home.
• 5. A niche is the role
of an organism.
What is the niche of the deer?
This is a habitat for algae.
Most unicellular algae live in
water, some dwell in moist
soil, and others join with
fungi to form lichens.
Groups of similar ecosystems
that are defined by weather and
geography are called biomes.
• Biomes include:
• Deserts, tundra, rainforests, grasslands,
deciduous forests, aquatic, & taigas.
• What biome do we live in?
II. Cycles of the Earth: Sunlight
powers them all!
• Water cycle
• Carbon Dioxide/
Oxygen Cycle
• Nitrogen Cycle
• Precipitation
• Evaporation &
transpiration
• Condensation
Water Cycle:
CO2 – O2 Cycle
• Sunlight
• Plants use CO2 and
release O2.
• Animals use O2 and
release CO2.
• Decomposers use O2
and give off CO2.
• Phytoplankton
produce O2.
Nitrogen Cycle
• Lightning changes
nitrogen into usable
form.
• Precipitation carries
nitrogen to ground.
• Plants and animals take
nitrogen in.
• Decomposers in soil
transfer it to bacteria
which converts
nitrogen to gaseous
form again.
Predator and prey…who are
they?
• Predators are the ones
who are eating the
prey.
Prey are those eaten by
the predators.
Producers and Consumers
• Producers begin the
food chain by
producing their own
food.
• Consumers eat
producers and other
consumers.
• Which are we?
Decomposers
• Decomposers break
down dead organisms
for food.
• Food chains show the
direction of energy as
it flows through an
ecosystem.
Earth’s resources
Resources are found in
nature (not man made)
• 1. Renewable –
replaced in less than
100 years (human
lifespan)
• 2. Nonrenewable –
replaced in more than
100 years
Recycling materials…
• Sometimes we do
recycle materials so
they may be reused.
• Examples include:
paper, aluminum, &
glass.
Where does your trash go if it’s
not recycled?
• A landfill is an area
of land where trash
is buried in a plastic
liner.