Ecology Unit Lesson
The following power point provides
additional information to assist you
with answering the homework for the
ecology review
Ecological Levels of Organization
From smallest to largest
1.
2.
3.
4.
5.
6.
Organism (species)
Population
Community
Ecosystem
Biome
Biosphere
(Click on the hyperlink to see an example
of each)
There are
inferences of biotic
and abiotic
interactions
depicted in the
diagram including
but not limited to
the fungi (biotic)
decomposing the
rotting log, the
kangaroo (biotic)
potentially
drinking from the pond, and sunlight (abiotic) providing
warmth and energy to promote photosynthesis in the
grass, trees and shrubs.
S
y together
living
m
b
R e l a ti o n s h i p s
o
t
I
c
mutualism
parasitism
commensalism
Click on each picture to
read more about the
symbiotic relationship
herbivore
carnivore
carnivore
A food chain model shows the feeding
relationships of organisms and the movement of
energy with the direction of the arrows
The Food Web
model depicts
many feeding
relationships
and many food
chains of a
community
This energy pyramid
indicates that
amount of energy an
organism receives at
each trophic level.
Each trophic level
receives 10% of the
energy from the
previous level
because 90% of the
energy is used by the
organism for daily
life processes or lost
at heat energy.
Biogeochemical Cycles
Click on the hyperlink to see the diagram of each cycle
•
•
•
•
model depicting how water cycles through
The Water Cycle isanaecosystem
a model depicting how carbon cycles
The Carbon Cycle isthrough
an ecosystem
a model depicting how nitrogen cycles
The Nitrogen Cycle isthrough
an ecosystem
a model depicting how phosphorus cycles
The Phosphorus Cycle isthrough
an ecosystem
Succession
The natural changes
that occur in an area
over time
Click on each
picture to learn
more about
primary and
secondary
succession
Click on picture to go back to
main menu
This is a cheetah, an example of a single
organism (living thing)or a species of cat
Click on picture to go back to
main menu
This is a population of cheetahs a
species living together in the same area
on picture to go back
This is a community of rhinos, Click
to main menu
zebras, and antelope- populations
living together in the same area
Click on picture to go back to
main menu
This ecosystem consists of animals,
birds, grass, trees, a small pond, air
and sunshine- all of the biotic and
abiotic factors in an area
Click on picture to go back to
main menu
The Tundra is a biome (a region depicted by its climateavg. temp. and rainfall in a year) closest to the Arctic
characterized by short plants, a permanently frozen
subsoil called permafrost, and Caribou
Click on picture to go back to
main menu
The biosphere includes all of the parts of the Earth
including the atmosphere above and the ocean deep
Click on picture to go back to
main menu
In a mutualistic relationship the Nile bird cleans
the teeth of the crocodile
Click on picture to go back to
main menu
The commensal
relationship of the
remora (sucker
fish) and the
stingray allow the
remora to move
from place to place
without any effort
Click on picture to go back to
main menu
The pupa of the braconid wasp covers the tomato
hornworm and kills it in this parasitic relationship
Click on the
diagram to
learn about
the Water
Cycle
Click here to
return to the
main menu
The Water Cycle
Click on the diagram
to read an article
about the carbon
cycle and to complete
the carbon cycle
assignment sheet
Click on the button
below to play the
carbon cycle game
The Carbon Cycle
Click here to
return to the
main menu
start
The
Nitrogen
Cycle
Click here to
return to
the main
menu
To learn more about the Nitrogen Cycle, you will play a game
that is set up around the room. You will act as a nitrogen atom
and travel from place to place. You will need your passport and
the nitrogen assignment sheet as you play the game.
The
Phosphorus
Cycle
Click here to
return to the
main menu
Study the
diagram
and
describe
how
phosphorus
cycles
through an
ecosystem
Click here to return to succession menu
Secondary succession occurs after a natural disaster such as a
forest fire or human action such as clear cutting where much of the
vegetation is destroyed, but soil remains for plants to grow again.
This form of succession occurs similarly to primary succession
except it occurs faster since there is no need to breakdown rock.
Click here to return to succession menu