Transcript What is the source of energy in this ecosystem?

Ecology- study of interactions among
organisms and their environment.
Ecosystem- all the organisms living
together with their environment
BIOTIC FACTORS- living organisms
. Ex. Animals, fungi, bacteria, plants
ABIOTIC FACTORS- nonliving parts. Ex
air, water, rocks, sand, light, and
temperature.
What is the
source of energy
in this ecosystem?
What path does
energy take to
get to the hawk?
Ecosystem Basic Design
• Species- a group of organisms that can mate to
produce fertile offspring.
• Population- a group of organisms of the same
species that live together.
• Community- a group various species that live in
the same habitat and interact with each other.
• Biome- specific habitat in which the community
lives.
Defined by temperature and vegetation.
A Food Chain is a simple
model that scientists
use to show how matter
and energy move
through an
ecosystem.
?
Herbivores- plant eaters
Omnivores- eat plants and
animals
Carnivores- eat animals
Decomposers- breakdown
organic compound
Ex. Fungi, bacteria
A Food Chain is drawn using arrows to
indicate the direction in which energy
is transferred from one organism to
the next.
Each organism in a food chain
represents a feeding step, or
Trophic Level, in the passage of
energy and materials
A food chain represents only one
possible route for the transfer of
matter and energy through an
ecosystem.
Many other routs may exist.
A Food Web is made up
of many interconnected
food chains and shows
all the possible feeding
relationships within a
community,
Use the diagram
on the right to
answer the
following
questions:
Who is the producer in this food web?
Algae
How many
different
food
chains 6
involve
Squid?
What are they?
algae  small animals  squid
 elephant seal  killer whale
algae  squid  killer whale
algae  squid  leopard
seal  killer whale
algae  small animals  squid 
elephant seal  leopard seal 
killer whale
algae  small animals  squid  killer whale
algae  small animals  squid  leopard seal  killer whale
10% Rule
Each time an organism eats another
organism, energy transfer occurs.
90% of the energy at each trophic
level is used to carry out functions
of living
Only 10% is available to the next
trophic level.
Using what we
know about
energy, how much
energy would be
available to the
leopard seal using
this food chain if
algae begins with
250,000 units?
25
250
2,500
25,000
250,000
250
What about the killer whale? 25
In the diagram above, which organisms
are considered primary consumers
In the diagram above, which organisms
are considered secondary consumers
Which organisms are considered both
secondary and tertiary consumers?