Data
Qualitative
• Written observations using words
• Record qualitative data about the
students in this class. Write your
example next to the definition.
Quantitative
• Written observations using
numbers
• Next to the definition find some
quantitative data in this class.
Organisms in an
Ecosystem

Habitat: the place where an
organism lives out its life.
1. it can change
2. or disappear
3. it is the location of food,
shelter, and other essential
resources.
Niche

The role and position a species
has in its environment-how it
meets its needs for food and
shelter, how it survives, and how
it reproduces.

The ecological niche of an organism
depends not only on where it lives but
also on what it does. By analogy, it may
be said that the habitat is the organisms
“address”, and the niche is its
“profession”, biologically speaking.
For Example:


Oak trees live in oak woodlands, so the
oak woodland would be the habitat.
Now, what do oak trees do?
Oak trees:
Absorb sunlight be photosynthesis
 Absorb water and minerals from the soil
 Provide shelter for animals
 Serve as a source of food for animals

Examples



Polar bears in the polar
regions-fur coat. What
other jobs do the polar
bears have?
It’s an advantage for a
species to occupy a niche
different from those of
other species.
Always try to reduce
competition.
Living Relationships: either
beneficial or harmful
Predator-Prey

Such as the lion and wildebeests.
The predator KILLS and eats the
animals, and the PREY is being
eaten. This relationship causes
fights for survival.
Symbiosis
(3 types)

Means living together; a close and
permanent association among
organisms of different species.
Commensalisms



1 species benefits
and the other is
neither harmed nor
benefited.
Ex. Dog-Human
Ex. Falcon-Geese
Mutualism

When two species benefit from
living in a close association.
Ex. Rhino-birds
 Ex. Ants-trees

Parasitism

One organism benefits at the
expense of the other.

Ex. Ticks, tape worm, round
worm