Download Why is it important to study populations?

Ch. 5 Ecology
• Each new day is designated
by a green background
• Self evaluation of
objectives
• Take Test on ch. 4
• Once you are done with
your test
• Glue in ch. 5 objective
and complete your preassessment
• Create a vocabulary list
for the following words
–
–
–
–
–
–
Population density
Geographic range
Growth rate
Age structure
Immigration
Emigration
Factors That Affect Population Growth
•
•
•
•
Birth Rate
Death Rate
Immigration (into a population)
Emigration (out of a population)
• ET: In your
notebook, answer
the following
question:
Why is it important to
study populations?
• Learning Targets: today I will…
– Identify methods for how
ecologist study population
– Develop methods for study
populations
• You are an ecologist studying populations of
Canadian geese in Fort Steilacoom park. You
have to collect one of the following pieces of
information: (Mrs. Sortore will assign your group one)
– Size of the population
– Geographic range within the park
– How fast the population is growing (Birth/death)
With your group, develop a plan for how you are
going to collect this information (15 min.)
Create a Field Study to collect
your data 20 min.
• Read through the rubric
• Can you find all the rubric items
in your field study?
• Modify your plan so that your field
study includes all rubric items –
create a poster with your methods
I. Controlled methods for
collecting the data
(consistency)
II. Data table / diagrams
III. Number of times this will be
done
IV. Duration of the study (how
long)
Group Share/Critique
• Using your field study rubric
you are going to assess
another groups field study
• Use the sticky notes at each
group to ask questions and
provide constructive feedback
• Please leave at least one
comment/questions per. Field
study you visit
UNTAMED SCIENCE!!!
• In your notebook, write down the methods you
see ecologist using to collect data
*Reminder – we are going outside so dress for the
weather in closed toe shoes and a coat
5.1/5.2 Limits to Growth
• ET:
• LT: Today I will
1. What is carrying
– Practice calculating
capacity?
population density
2. What factors
– Identify different types of
determine carrying
distribution for a population
capacity?
– Explain how the density and
distribution effect a
population (density
dependent factors)
Describing Populations
Density and Distribution
• Population Density = number of individuals per unit area
• Distribution = how individuals are spaced
Random
Uniform
Clumped
p. 130-131
Lets Practice!
• In these 2 models you will practice calculating
populations density and identifying density
dependent limiting factors
Q: A mutant for of lice has appeared in
a population, explain possible
outcomes for the below two scenarios
• Population 1: low
density and random
• Population 2: high
density with clumped
distribution
Limiting Factors
• Density Dependent
1. Competition
2. Predation or Herbivory
3. Parasitism
4. Stress from
overcrowding
• Density Independent
1. Unusual weather
2. Natural disasters
Field Study
• LT: Today I will…
– Conduct a field study to
investigate common
weed populations on a
school lawn
• ET:
1. Review your vocabulary
words for this chapter
(2 min)
2. Have the person across
from you quiz you on
your words
•
•
•
•
•
•
•
Population density
Age structure
Immigration
Emigration
Carrying capacity
Geographic range
Distribution (3 kinds)
Logistical vs. Exponential
• Learning objectives:
today I will…
– Differentiate between
logistical and exponential
growth in a population
– Compare human growth
to logistical and
exponential growth
• ET: What is
demography?
Draw the model on your paper
Answer the questions below
• 3 phases
1. Exponential Growth
2. Growth Slows down
3. Growth Stops
Logistical Growth
Exponential Growth
• When conditions are ideal and resources are
unlimited populations will just get larger and
larger and larger and larger and larger…..
Analyzing Data
• Pg. 135 Multiplying Rabbits
The Human Population
Q: Is human population growth exponential or
logistical? Why? (private think time, answer in
your notebook)
• LT: Today I will…
– Describe The 3
phases of
demographic
transition
– Create age
structure
diagrams
– Claim, Evidence,
Reasoning (CER)
with age
structure
diagrams
(interpreting
data)
Age Structure
• ET: From last class
– What can we infer
about the population
below?
HUMANS
Q: What is this graphic showing? Talk
with your group and each will share out
• What is this diagram depicting?
Age Structure Diagram Features
•
•
•
•
Title
Age in years
Gender
# or % of the
population
CER – Claim, Evidence, Reasoning
• With your group, you will
develop a claim/inference
about that population
• What evidence from your
age structure diagram led
you to this inference
• Provide reasoning behind
the data used
6.1 A Changing Landscape
• ET: How do our daily
activities affect the
environment? (list 3)
• Key vocab: renewable
resource, nonrenewable
resource, sustainable
development
Resources
• Non-renewable
–
–
–
–
Oil
Coal
Natural Gas
Uranium
• Renewable
– Wind
– Water
– Solar
Sustainable Development
• Using natural resources without
causing long term damage to the
environment (soil, water, climate)
Examples of Sustainable Development
Answer The Following Questions
Pg. 158
• What is soil erosion? What causes it? what is
desertification?
• What is biomagnification? What is DDT? Why
are both bad?
• What are the major forms of air pollution?
What causes acid rain?
Soil as a renewable
resource
• Soil Erosion
1. Why is it bad?
2. What are the
main causes?
Fresh Water
• What is
Biomagnification?
• Why is it important?
Atmospheric resources
• What are the
major forms of
air pollution?
• Smog, acid rain,
greenhouse
gasses, and
particulates
Biodiversity 6.3
• LT: Today I will…
– Define biodiversity
and explain its value
– alter habitat and the
affect that it has on
the biosphere
• ET: What does the word
“diversity” mean?
• Define
1. Habitat Fragmentation
2. Ecological hot spot
Threats to Biodiversity: Discussion
1. Altered Habitats
2. Hunting and the
Demand for wildlife
products
3. Introduced Species
4. Pollution
5. Climate Change
Conservation of Biodiversity
(Untamed Science: Zoos)
• Protecting individual species
• Preserving habitats and
ecosystems (hot spots)
• Considering local interest