WOOOOT!

Fold your lab sheet in half.

Put the lab sheet and the rubric in
the lab notebook.

Put the lab notebook in the box
below.
Let’s dig in!
Find the wolf
concept map from
yesterday – we’re
going to add
formal notes.
Quiz tomorrow on
terms Obj #1-7
Consumers (= heterotrophs)
• herbivores feed directly on producers;
• carnivores feed on consumers;
• omnivores: consumers that feed on both plants &
animals;
• scavengers: feed on dead organisms;
• decomposers: consumers that complete the
breakdown & recycling of organic materials from the
remains & wastes of other organisms;
• detritivores: feed on detritus (partially decomposed
organic matter, such as leaf litter & animal dung).
© Brooks/Cole Publishing Company / ITP
Detritivores vs. decomposers
Fig. 4–12
© Brooks/Cole Publishing Company / ITP
Food Webs & Energy Flow: Secret of the
arrows???
Food Webs & Energy Flow:
Secret of the arrows???
Fig. 4–14
© Brooks/Cole Publishing Company / ITP
Biotic vs. Abiotic

Mockingbird

Air temperature

Oak tree

Water pH

Bacteria

Waves

Bison

Fire

Human

Wind

Ladybug

Sunlight

Leaves on the ground

Humidity

Deer antler

Intraspecific competition

Interspecific competition
Compare!
Niche: An organism’s
role in its ecosystem
 (including its trophic
level, where it lives,
symbiotic
relationships, and if it
creates habitat for
other species; can
include habitat)


Habitat: the place an
organism is found
Choose a species

Identify the habitat

Identify the niche

Be ready to share your interpretations

Fundamental niche: The
full potential range of
the physical, chemical,
and biological factors a
species can use if there
is no competition from
other species.

Realized niche: Parts
of the fundamental
niche of a species that
are actually used by
that species.
Resource Partitioning
Division of fundamental niches into realized
niches by organisms through competition.
Range of Tolerance
Check for understanding

What is on the quiz tomorrow?

What are we doing after the quiz?

What do you need to wear for this class tomorrow?

Which way do the arrows always point on a food web?

Name something that comprises an organism’s niche.

What is the difference between a fundamental and realized niche?

How do organisms divide the fundamental niches into realized niches?