Show:
Terms
Factors/Zones
Population ecology
Graphs
Grab Bag
100
Any abiotic or biotic factor that restricts the existence, numbers, reproduction, and distribution of organisms
What is a limiting factor?
100

Density dependent limiting factors

parasitism

disease

competition for food

what else?

100

What could indicate that a population is decreasing in size?`

- the birth rate is decreasing

- the death rate is increasing 

- the emigration rate is increasing
100

What happens to populations when they reach carrying capacity?

The positive factors equal the negative factors:


BIRTHS + IMMIGRATION= DEATHS + EMIGRATION



100

using resources at a rate that does not deplete them

sustainability

200

grass, weeds, beetles, other insects, earthworms, and grubs

What are examples of populations?

200

A resource that cannot be replenished in a reasonable time frame for continued use

nonrenewable resource

200

What processes increase a given population

-births

-immigration

200

Draw a logistic population growth curve

your graph should have population # on the y-axis and time on x-axis and an S Curve

200

Age Structure Diagrams or Population Pyramids show

percentage of males and females for each population age group

EX: 0-4 years old represents the babies/young children (bottom of graph)

80+ represents the elderly (at the top of the graph)

300

Disadvantages of renewable resources

Expensive to put in place 

Can harm wildlife (windmills-birds and bats, etc.)

300
Portion of the Marine Biome where photosynthesis can take place
What is the Photic Zone?
300

What is an example of a density independent factor?

-weather events 

-natural disasters (earthquake, volcano, tsunami, etc.)


300

Draw an graph for a population that is increasing exponentially.

your graph should have population # on the y-axis and time on x-axis and an J Curve

300

Populations move from exponential growth to logistic growth (two different graphs!!) due to what factors?

limiting factors: limited resources

400

deforestation

removal entire forests of all the trees

400
The size of this zone depends upon the slope of the land and the difference between the high and low tides.
What is the Intertidal Zone?
400

How does the natural increase in the human population affect the environment?

-exponential growth of the human population can result in resources being used faster than they can be replaced

400

Why does a population's exponential growth change to logistic growth?

When the population meets limited resources it reaches carrying capacity
400

Ecosystems that have more consumers that producers are not ______________

sustainable

500

The total variety of organisms in the biosphere

Biodiversity

500
Salinity, depth, availabilty of light, and temperature
What are abiotic factors for the Oceans?
500

How does adding nonnative or invasive species like the python in South Florida, affect the environment?

nonnative or invasive species often prey on native organisms and cause native populations to decrease.

500

At what part of an exponential growth curve does a population show the greatest rate of growth?

Where the line is the most steep, almost vertical

500

What are the negative effects of burning fossil fuels (nonrenewable resources)

- they will run out eventually

- the pollute, adding extra carbon dioxide to the atmosphere faster than can be removed in the carbon cycle.