Download Population Dynamics, Part II

Warm-Up (2/26)
On the piece of white paper from the back, answer
the following question.
Predict the effects of deforestation
on ocean acidification.
Name
Date
Period
4A.6b: Changes in regional and global climates and in atmospheric composition
influence patterns of primary productivity.
4A.6e: Models allow the prediction of the impact of climate change in biotic and
abiotic factors.
4A.6e.1: Competition for resources and other factors limits growth and can be
described by the logistic model.
4A.6e.2: Competition for resources, territoriality, health, predation,
accumulation of wastes and other factors contribute to density-dependent
population regulation.
4A.6f: Human activities impact ecosystems on local, regional and global scales.
4A.6f.1: As human populations increase in numbers, their impact on habitats
for other species have been magnified.
4A.6f.2: In turn, this has often reduced the population size of the affected
species and resulted in habitat destruction and, in some cases, the extinction
of species.
4B.4a: Human impact accelerates change at local and global levels.
Illustrative example: human activities threaten ecosystems on Earth
4C.2b: An organism’s adaptation to the local environment reflects a flexible
response of its genome.
Illustrative example: alterations in timing of flowering due to climate changes
Population Dynamics, Part II
Regulation of
population sizes is
density-dependent.
Populations of
species compete for:
resources
Population Dynamics, Part II
Regulation of
population sizes is
density-dependent.
Populations of
species compete for:
resources
territory
Population Dynamics, Part II
Regulation of
population sizes is
density-dependent.
Populations of
species compete for:
resources
territory
prey
Population Dynamics, Part II
Regulation of
population sizes is
density-dependent.
In short, limited food
and accumulated
waste restrict growth.
after
before
Population Dynamics, Part II
And thus population size grows with a logistic curve.
Population Dynamics, Part II
If food is not renewable, the population dies.
Population Dynamics, Part II
after
before
Population Dynamics, Part II
Habitat destruction due to human expansion causes
reduced population sizes.
Critical Thinking Question #1
Describe a logistic growth curve
and explain why a population
size would be plotted over time
using a logistic growth curve.
4A.6b: Changes in regional and global climates and in atmospheric composition
influence patterns of primary productivity.
4A.6e: Models allow the prediction of the impact of climate change in biotic and
abiotic factors.
4A.6e.1: Competition for resources and other factors limits growth and can be
described by the logistic model.
4A.6e.2: Competition for resources, territoriality, health, predation,
accumulation of wastes and other factors contribute to density-dependent
population regulation.
4A.6f: Human activities impact ecosystems on local, regional and global scales.
4A.6f.1: As human populations increase in numbers, their impact on habitats
for other species have been magnified.
4A.6f.2: In turn, this has often reduced the population size of the affected
species and resulted in habitat destruction and, in some cases, the extinction
of species.
4B.4a: Human impact accelerates change at local and global levels.
Illustrative example: human activities threaten ecosystems on Earth
4C.2b: An organism’s adaptation to the local environment reflects a flexible
response of its genome.
Illustrative example: alterations in timing of flowering due to climate changes
Population Dynamics, Part II
But some species can adapt.
Plants, for
example,
flower earlier
in the year
due to global
warming.
Critical Thinking Question #2
Explain how warmer, shorter winters
would affect levels of signal
transduction proteins and
transcription factors in a flowering
plant, and describe how this would
lead to earlier flower buds. (LO 4.24)
Closure
On the piece of white paper from the
back, answer the following question:
Predict how expansion of
human populations into new
areas might result in greater
regulation of population sizes of
native species.
Name
Date
Period
Scale
1 – 10