Introducing
© 2004 Plano ISD, Plano, TX
Essential Question
• What is an Ecosystem and
How does energy flow within
an Ecosystem?
Warm-up 2/13/12
• Finish filling in your Biome
Chart from Friday
© 2004 Plano ISD, Plano, TX
Unit Essential Question: How do organisms interact with
each other the abiotic factors within the area that they live? In
which direction does energy flow within the system? What
happens when the flow of energy is interrupted? What
happens when non-native species are introduced into an area?
Lesson Essential
Questions:
1. What is an
ecosystem?
2. Where does the
energy come
from within an
ecosystem?
3. How does the
energy flow
within an
ecosystem?
© 2004 Plano ISD, Plano, TX
Lesson Essential
Lesson Essential
Questions:
Questions:
1. In what ways can 1. What happens
species interact
when
with each other?
chemicals
2. What is
naturally leach
into systems?
symbiosis?
Define the four
2. What happens
major types.
when humans
introduce
chemicals into
the
environment?
Lesson Essential
Questions:
1. What happens
when an
ecosystem is
affect by fire or
other major
geologic/weath
er event?
2. How might the
ecosystem
change?
3. What happens
when humans
introduce a
new species
into an area?
Ecosystem
includes all abiotic and biotic factors in
one particular environment
Biotic Factors
Abiotic Factors
the living parts of
an ecosystem
the nonliving parts
of an ecosystem
© 2004 Plano ISD, Plano, TX
Bio
Biotic Factors
include plants, animals, fungi,
microorganisms
bio(s), bio(t)
(G) root
biotechnology
biomechanics
biostatistics
biofeedback
biography
biosphere
biology
biotic
© 2004 Plano ISD, Plano, TX
life
Examples of Biotic
Factors
© 2004 Plano ISD, Plano, TX
A
Abiotic Factors
include air, water, soil, temperature,
wind, source of energy (usually sun)
a, an
(G) prefix
abiotic
amusia
amoral
atoxic
© 2004 Plano ISD, Plano, TX
not, without
Examples of Abiotic
Factors
© 2004 Plano ISD, Plano, TX
Examples of Ecosystems
Mountains
Coral
Arizona
ReefinDesert
inColorado
Belize
© 2004 Plano ISD, Plano, TX
Ecosystems
do not necessarily have clear boundaries
due to biotic and abiotic changes
can change daily as things move from one
ecosystem to another
Biotic
Abiotic
migration, seed
dispersal
flood, erosion,
drought
© 2004 Plano ISD, Plano, TX
Biotic Factors
interact with each
other in complex such as
ways
also interact with
abiotic factors in
the ecosystem
© 2004 Plano ISD, Plano, TX
parasitism
mutualism
competition
dependent upon
water, minerals,
temperature, light
© 2004 Plano ISD, Plano, TX
Biome
a major regional or global biotic
community, a super ecosystem,
defined chiefly by the dominant
forms of plant life and the
prevailing climate
© 2004 Plano ISD, Plano, TX
Major Biomes of the World
desert
grassland
tropical rain forest
deciduous forest
coniferous forest
tundra
ocean
© 2004 Plano ISD, Plano, TX
Levels of Organization
all
one
all
smallest
large
group
interacting
organisms
living
individual
region
of
unit
and
populations
of
similar
with
living
different
nonliving
of
organs
the
living
typical
thing
same
cellsin
an
organized
kind
plants
kinds
working
ecosystem
things
living
and
of to
in
work
animals
interacting
one
together
tissues
together
area
that
within
includes
workinga
certain
together
several
area
ecosystems
cell
© 2004 Plano ISD, Plano, TX
Food Chains
• Producer- uses the sun to make food
• Consumer- Consumes other living things
for energy
• Predator- Hunts other animals
• Prey- is hunted
• Scavenger- feeds on dead animals
• Decomposer- mainly bacteria that speed
up the decomposition of everything
© 2004 Plano ISD, Plano, TX
How do things interact??
Food Chains
Tertiary
Consumer
Secondary
Consumer
Trophic
Levels
Primary
Consumer
© 2004 Plano ISD, Plano, TX
Producer
Food Web- ALL of the individual
food chains in an ecosystem
© 2004 Plano ISD, Plano, TX
How does Energy in a System Flow?
.01%
.1%
1%
10% of the
energy moves
on, the rest is
used for
metabolic
functions
10%
100%
Energy comes from the
sun
© 2004 Plano ISD, Plano, TX
Work with your group to construct
your own food Chain
•
•
•
•
•
What comes first?
Think what would eat that?
Which trophic Level comes next?
Which animal would fit best?
When done Have Mrs. Barkus check. After you
have been approved try making a food web.
© 2004 Plano ISD, Plano, TX
Compare a Food Web and Food Chain
Food Web
Food Chain
Same
1.
1.
1.
2.
2.
2.
3.
3.
3.
© 2004 Plano ISD, Plano, TX