Slide 2 Ecology Slide 3 What is Ecology? The study of the
interaction of living organisms with one another and their
environment. Slide 4 Levels of Ecology Species Population Community
Ecosystem Biomes Biosphere Slide 5 Population: All the individuals
of a species living together in one place at one time Slide 6
Demography is - Demography: the statistical study of populations So
what is a Demographer? Demography: the statistical study of
populations So what is a Demographer? Slide 7 Features of a
Population Population Size : # of individuals in a population
Population Density : # of individuals that live in a given area
Dispersion : the way individuals of a population are arranged in
space Population Size : # of individuals in a population Population
Density : # of individuals that live in a given area Dispersion :
the way individuals of a population are arranged in space Slide 8
Dispersion Even Random Clumped Slide 9 Distribution clumped Slide
10 Distribution even Slide 11 Distribution random Slide 12 How do
populations grow? Slide 13 Slide 14 Population Growth Model Used to
study how populations change 3 stages of complexity to population
growth 1. Birth rate: when more organisms are born than die. Used
to study how populations change 3 stages of complexity to
population growth 1. Birth rate: when more organisms are born than
die. Slide 15 2. Growth Rate Relationship between number of births
and deaths Slide 16 Births > Deaths Immigration: individuals
move into area Births > Deaths Immigration: individuals move
into area Population Growth Slide 17 Population Decline Deaths >
Births Emigration: individuals move out of area Deaths > Births
Emigration: individuals move out of area Slide 18 Graphing
Populations J curve: Infinite growth of a population S curve: Has a
carrying capacity! J curve: Infinite growth of a population S
curve: Has a carrying capacity! Slide 19 Stage IStage IIStage III
time Population size Births > DeathsExponentialLogistic Carrying
capacity (K) Which graph represents human population growth? Which
graph represents bacteria population growth with unlimited food?
Which graph represents elephant population growth? Which is it?
Slide 20 Limitations to population growth Abiotic Factors
(nonliving things): space, water, disease, weather, fire Biotic
factors: (living things): predators, prey, plants Abiotic Factors
(nonliving things): space, water, disease, weather, fire Biotic
factors: (living things): predators, prey, plants Slide 21 Limiting
factors can be.. a. Density-Independent Factors (entire population
would die) Weather (tornado, floods), climate, clear- cutting,
fires b. Density-Dependent Factors (portion of population affected
depends upon how individuals are dispersed) Limited resources (
Food, water, land), Disease Slide 22 Characteristics of growth
curves What would A,B,C, and D represent? Slide 23 Terms:
____________________________: The population size that an
environment (ecosystem) can sustain ____________________________:
Any factor limiting the survival and productivity of organisms, for
example, the lack of water could limit grass in a grassland biome.
Slide 24 _______________________: Limited resources whose rates of
depletion depend on the density of the population using them.
Examples include: food, water, mates, competition for resources!
_______________________: Factors such as, climate and weather that
affect the growth of populations =. These factors are unaffected by
the density of populations hence the term Slide 25 Reproductive
Strategies r-strategists Fast growing Exponential Short life span
Reproduce early Many offspring No parental care Ex.Bacteria,
insectsK-strategists slow growing Near carrying capacity Long life
span Reproduce late Few offspring Parental care Ex:Tigers, gorillas
humans Slide 26 World Population Growth Human numbers through time
Slide 27 The End Slide 28 Backdrops: - These are full sized
backdrops, just scale them up! - Can be Copy-Pasted out of
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