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Section 1 – ecosystems
Section 2 – evolution
Section 3 – diversity of life
CHAPTER 4THE ORGANIZATION OF
LIFE
An ecosystem is an area that …includes all the organisms and the physical (nonliving) environment
Section 1 - Ecosystems
they do not have clear boundaries living things can move from one ecosystem
to another
Ecosystems are connected
Energy MineralsCarbon dioxide
(CO2)Water (H2O)Oxygen (O2)SoilLiving thingsAnd others….
Ecosystems have certain basic
components…….
If one part (component)
of an ecosystem is destroyed, or changes,
the entire ecosystem may be affected
Biotic Factors/Components ….living or once living things Abiotic Factors/Components …..physical, nonliving things
Examples are……
TidesMoldButterfliesMineralsPrecipitation – snow, sleet, rain, …BacteriaFeatherWindSoilEarthwormsScat (poop)
What would these be? Biotic or Abiotic?
Each of the following slides shows an ecosystem,
……think of the biotic and abiotic factors
that might be present in each
Scientists organize living things into groups to make them easier to study …..
The Levels Of Organization of living things are….
organismpopulationcommunityecosytembiosphere
Organism…. a single individual of a species
SPECIES – organisms that are…
structurally similar, naturally interbreed (mate),
and produce fertile offspring
Population – includes all the members of a single species within a given area
Community – includes all the species (living things) within a given area
Ecosystem – includes all the living (biotic) and nonliving (abiotic) things within a given area
HABITAT - the place that an organism lives
(its address)
Every habitat has specific biotic and
abiotic factors
Organisms tend to be well suited to their natural habitats
What is the habitat of the chipmunk?
Organisms within an ecosystem have a particular habitat and niche…..
An organism’s niche includes……
1. the environmental factors
necessary for its survival
2. its interactions with other
organisms
3. its interactions with the
environment (its physical surroundings)
What is the niche of the chipmunk?
NICHE – an organism's role in its environment (its job or occupation)
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