Download Levels of Organization PPT

AGENDA
 Take out notebooks, pick up handouts (CLASS
COPY, DO NOT WRITE ON), and three sheets of
white paper!
Bell-Ringer: Ecology
Levels of Organization notes
Levels of Organization Foldable 
Bellringer 3-21-16
• Ecology is the study of interactions that take place between organisms
and their environment.
(Where they live, what they eat, and what eats them)
Write a list (at least four detailed things)
you remember learning about in the past
about Ecology:
Example (can’t use):
I learned about how the arrows in a food
chain show the direction of energy flow
Areas of Study In Ecology:
-Energy Flow (food chains/webs)
-Symbiosis (relationships between different species)
-Succession (environmental change over time)
-Cycles (how matter: such as water, carbon, and nitrogen cycle through the ecosystem)
LEVELS OF ORGANIZATION
• Ecologists have organized the living world into
levels—
• the organism by itself
• population
• community
• and ecosystem
LEVELS OF ORGANIZATION
ORGANISM
• An individual living thing that is made of cells,
uses energy, reproduces, responds, grows,
and develops.
LEVELS OF ORGANIZATION
POPULATION
• A population is a group of organisms, all of the
same species, which interbreed and live in the
same area at the same time.
LEVELS OF ORGANIZATION
COMMUNITY
• A biological community is made up of
interacting populations in a certain area at a
certain time (different groups of species in the same area)
COMMUNITY
• A change in one population in a community
may cause changes in the other populations.
LEVELS OF ORGANIZATION
ECOSYSTEM
• Biological communities that interact with each
other in a given area and PLUS the abiotic
factors of that area.
Biomes are a group of similar ecosystems
with similar abiotic and biotic factors.
(example: hot/dry desert in Nevada and
North Africa)
BIOSPHERE
• In Biology we study
the portion of Earth
that supports life,
called the Biosphere
• It extends from high
in the atmosphere to
the bottom of the
oceans.
ORGANISMS IN ECOSYSTEMS
• A habitat is the place
WHERE an organism
lives out its life.
ORGANISMS IN ECOSYSTEMS
A niche is the WAY an organism lives out it’s
life—
• how it meets its specific needs for food and
shelter
• how it survives,
• and where it reproduces in its environment.
ORGANISMS IN ECOSYSTEMS
• Why is it thought that two species can’t exist
for long in the same community if their niches
are the same?