Slide 1

2.2 Interactions Among Species
(Pages 56-64)
Homework: Page 64 # 3-8


Slide 2

Key Concepts: (Page 64)
• Each species occupies an ecological
niche, which has biotic and abiotic
components.
• Many species, such as bog plants, occupy
narrow niches for which they are well
adapted.


Slide 3

• Predation, competition, mutualism,
and parasitism are four major kinds
of relationships between species.
• These relationships help to define a
species’ niche and influence the
distribution and abundance of the
species.


Slide 4


Slide 5

Species Ecological Niche:
1. What is an ecological niche?
Ecological niche is the way that an
organism occupies a position in
an ecosystem.


Slide 6

2.What are the biotic niche factors of a
brown bat?
It includes all the insects that it eats, its
competitors and predation.


Slide 7

3. What are the abiotic niche factors of a
brown bat?
It includes the places it uses for
roosting and hibernation, the airspace
and temperature range it can tolerate.


Slide 8

4.Describe a “bog”. Why are
carnivorous plants, such as the
pitcher plant, thrive only in bogs?
A bog is a type of wetland in which
the water is acidic and low in
nutrients.


Slide 9

Population and Population Size:
5. What is a predator and prey?
A predator is an organism that kills
and consumes other organisms.
A prey is an organism that is eaten as
food by a predator.


Slide 10

6. Movie: Trials of Life
Predator

Prey


Slide 11

Competition:
7. What happens when the number of
population of certain species in an
ecosystem increases?
As population of species
increase, the competition for
resources also increase.


Slide 12

8. In

the picture are snails that live in
shore by the ocean. If the population
of snails multiples exponentially, what
will happen with this small
ecosystem?
Snails would compete for food,
nutrients and space.


Slide 13


Slide 14

8. In the picture below are different species of plants
that thrive in the rainforests such as ferns, wild
palm trees, bamboo and ginger plant. Which plant
species do you think will take most of the resources
available in order to survive and why?

The bamboo plant will take most of the
resources available in order to survive
because their roots are bigger, they
grow taller and they multiply faster.


Slide 15


Slide 16

Symbiosis:
10. Complete the table below:
• Symbiosis and Types
• Mutualism-A symbiotic relationship wherein
both species benefit. (corals and algae)
• Parasitism-An organism that depends on a
host for survival.(Tapeworms & Humans)
• Predation-A biological interaction where a
predator feeds on its prey.(Lions & Zebra)
• Competition-Where organisms fight for
resources to survive.(Dandelions & Grass)


Slide 17

11. Describe the symbiotic relationship
between corals and algae. What causes the
color loss associated with bleaching?

Algae gives off oxygen and other
nutrients to the coral and the coral
polyp provides shelter and carbon
dioxide to the algae.
Algae cause the colour in coral reefs.
When they die out, bleaching or
whitening occurs.


Slide 18


Slide 19

• Trials of Life