Population Flash Cards
Describe and graph exponential population growth
- “J” curve
- Slow initial growth and then a rapid population explosion after
- occurs when there are no limits to population size
Use link for image…http://www.starsandseas.com/SAS%20Ecology/SAS%20population/ecopop_grwth.htm
What are some factors affecting population size? What are they called?
LIMITING FACTORS:
- Humans
- Weather
- Space (area)
- Habitat (shelter)
- Food
- Water
- Predators
- Disease
LINEAR POPULATION GROWTH
Define…
- Linear
- Population
- Growth
Linear: in the form of a line
Population: the amount of organisms in an area
Growth: increasing in numbers
Describe and graph linear population growth
- Normal line shape
- Steady rate of growth that is consistent over the generations
Use link for image…http://www.starsandseas.com/SAS%20Ecology/SAS%20population/ecopop_grwth.htm
What is the x axis labeled as on population graphs? The y axis?
x axis: time
y axis: population size
EXPONENTIAL POPULATION GROWTH
Define…
-Exponential
Exponential: keeps doubling; the bigger it gets, the faster it grows
PREDATOR-PREY RELATIONSHIPS
Define…
- Predator
- Prey
Predator: something that eats/hunts for food
Prey: the thing that is eaten or hunted
Describe and graph predator-prey relationships
- When predators are HIGH, prey is low because they ate prey that reproduces
- Typically, both are NOT high/low at the same time
- They are OPPOSITES: when one is high, the other is low and when one is low the other is high
Use link for image… http://www.tiem.utk.edu/~gross/bioed/bealsmodules/predator-prey.html
Carrying capacity
The number of organisms that can be supported by an area (how many things can live somewhere and have their needs met)
Exponential growth to carrying capacity
The doubling of a population until it reaches the total number that can survive in the area
Describe and graph exponential growth to carrying capacity
-The population growth becomes steady at the capacity that can survive (the number if organisms stays the same now)
Use second image…http://www.dummies.com/how-to/content/the-environmental-science-of-population-growth-mod.html
Exponential growth to carrying capacity with population crash
-Graph
The doubling of a population (exponential growth) until it reaches the total number that can survive in the area (carrying capacity) followed by a dramatic drop in population size (population crash) that occurs when a population exceeds its carrying capacity
-Use this image except add dramatic population drop at the end of the graph…https://biologyeoc.wikispaces.com/CarryingCapacity
Biological accumulation
The accumulation of toxins in the tissues of living organisms that moves on from one organism to another when it is eaten. The harmful substances never disappear, unlike energy, and either build up in an organism with no effect, make the organism sick, or kill it.
