Download POPULATIONS

3.1: What is Ecology?
1
ecology: study of the interactions
that take place among organisms
and their environment
ecology is hierarchal – each level
builds on itself and they fit
together like nesting boxes
2
organism: an individual life form
lowest level of organization
3
population: group of organisms of one
species living in the same place at the
same time
4
community: several populations that
live in a common environment
5
ecosystem: community of living
organisms & the nonliving features of
their environment
6
biome: group of ecosystems that
share a similar climate and organisms
7
biosphere: life-supporting areas of
Earth composed of air, land, & water
highest level of organization
8
9
Limiting Factor
anything that restricts the number
of individuals in a population
includes living and nonliving
features of the ecosystem
10
The Nonliving Environment
abiotic factors: nonliving
parts of an organism’s
environment
abiotic factors affect an
organism’s life
examples: air currents,
temperature, moisture, light
11
The Living Environment
biotic factors: all the living
organisms found in a particular
environment
all organisms depend on others
(directly or indirectly) for food,
shelter, mates, or protection
12
Abiotic or Biotic?
Biotic
13
Abiotic or Biotic?
Abiotic
14
Abiotic or Biotic?
Both!
15