What do the wolves in this picture represent?
Populatio
n
Ecosy
stem
Community
Biome
100%
0%0%0%
1. Population2. Ecosystem3. Community4. Biome
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24
Which of the following could be the wolves COMMUNITY?
All the
populat
ions o.
..
The wolv
es, a
nd the..
.
The wolv
es an
d the s
oil
38%
0%
62%1. All the populations
of wolves in that biome
2. The wolves, and the moose
3. The wolves and the soil
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24
Everything in this picture would add up to a/an…
Populatio
n
Biome
Ecosy
stem
Species
0% 0%
90%
10%
1. Population2. Biome3. Ecosystem4. Species
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24
The Atmosphere, Water and Soil pictured below are examples of…
.
.
.
.
.
.
Biotic
Factors
Abiotic
Factors
Ecosy
stem
Populatio
n
Community
0%
95%
0%0%5%
1. Biotic Factors2. Abiotic Factors3. Ecosystem4. Population5. Community
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24
The rabbit and wolf below represent a/an…
.
.
.
.
.
.
Biotic Fac
tors
Abiotic Fac
tors
Ecosy
stem
Populatio
n
Community
100%
0%
81%
10%5%
1. Biotic Factors2. Abiotic Factors3. Ecosystem4. Population5. Community
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24
Intro to ECOLOGY (Chapter 33)
33.1
The study of the interaction of organisms with each other and their physical environment
Organisms are organized into: Populations – ex: Perch
(Members of a species living in an area) Communities –ex: Perch, Walleye, Algae
(All the populations in an area) Ecosystems –ex: Fish, Algae, Rocks, water
(A community and its physical environment) includes biotic and abiotic factors
Biomes –ex:Tundra, Rainforest (A large group of similar ecosystems containing distinct
types of plants, animals, etc…determined by climate) Biosphere
(all the communities on Earth whose members exist in air, water, and on land)
ONE species!
More than ONE species!
Adds NONliving components!
How do populations grow? BIOTIC POTENTIAL: highest possible per
capita rate of increase for a population Per capita rate of increase= (Births-Deaths) / # of
individual LIMITING FACTORS: (create environmental resistance)
Biotic-living parts of the ecosystem vegetation, etc
Abiotic – nonliving parts of the ecosystem Precipitation Temperature Inorganic nutrients
Enter question text...
Enter an
swer
text...
0%
1. Enter answer text...
Exponential Growth…J curves Has two phases:
Lag phase: growth is slow because the population is small
Exponential Growth Phase: growth is accelerating, and the population is exhibiting BIOTIC POTENTIAL.
Cannot usually continue for long because of …
Environmental Resistance & Carrying Capacity
Environmental Resistance: all the environmental conditions that prevent populations from reaching their biotic potential
Ex: limited food supply, accumulation of waste, predation, competition…(biotic and abiotic limiting factors)
MOST populations taper off around their…
Carrying Capacity: # of individuals the environment can normally support
We call this kind of growth…
Logistic Growth This creates an “S
shaped curve” Four phases:
Lag Exponential growth Deceleration phase (pop
growth slows) Stable equilibrium
phase/stationary phase (births and deaths start to even out)
1. Where is the carrying capactiy in this curve?
…Survivorship Curves p. 683…Human Population Growth
developed vs. less developed countries
…Age distributions
Discussion Topics…
