Carrying Capacity
Limiting Factors
Predators/Prey
Random
100
What do we call the dotted line labeled "D" 
Public
Carrying Capacity
100
What is a "limiting factor"?
Something that limits the population of a species from growing in an ecosystem
100
One bear needs 10 fish a day. If a river where the bears live can offer up 180 fish each day, what is the carrying capacity?
18 bears
100
What is the process called when a plant makes its own food?
photosynthesis
200
Define "Carrying Capacity"
the maximum number of individuals of a population that the environment can support is the...
200
Give at least 2 examples of a BIOTIC limiting factor.
food availability, predators, Disease (bacteria), etc.
200
True or False: there are more lynx than hares in 1920.
False - there are more hares in the ecosystem in 1920
200
When a non-native species comes into a new area and hurts the ecosystem it is called an __________
invasive species
300
What causes a population to level off like in the graph shown below? (i.e. why can't a population just keep growing and growing?) 
Limiting Factors
300
Give at least 2 examples of ABIOTIC limiting factors
drought, severe winter, natural disaster, loss of habitats, space, etc
300
What happens when there are too many predators in an ecosystem?
They have to compete against each other.
300
What are 2 limiting factors for deer in southern Indiana?
people hunting, amount of food, water, etc.
400
What is the carrying capacity? 
about 250
400
In a forest ecosystem, which of the following is the best example of a limiting factor for a rabbit population?
a. the robin (bird) population
b. amount of grass/flowers available
c. the amount of sunlight
d. rabbits have no limiting factors
b. amount of grass/flowers available
400
List 3 biotic factors
animals, trees, grass, plants, etc
400
What determines the carrying capacity of an ecosystem?
Limiting Factors
500
Which of the following might cause the carrying capacity of this rabbit population to DECREASE?
a. increase in food for a few years
b. fewer predators
c. harsh winters for a few years
d. more resources available in the ecosystem
c. harsh winters for a few years
500
Based on this graph, why do you think the lynx and hare population increase and decrease during the same years? 
They have to compete with each other for food and their populations drop. Then there are less animals so they have enough food for a while.
500
True or False: A population can change even when the carrying capacity stays the same.
True
500
True or False: If two species compete for the same resources (eat the same food, live in the same area, etc.), then they will each have lower carrying capacities compared to if they lived alone.
True!