Ecosystem Dynamics
When primary producers in an ecosystem decrease in number, this is what happens to the consumer populations
What is decrease?
The lowest level on a food web shows this type of organism
What is a primary producer?
Used to sample a small area of a habitat and record the number of organisms in that given space
What is a Quadrat?
what is released?
Removing an apex predator from an ecosystem will cause primary and secondary consumer populations to ______________.
What is increase?
The organisms on the second and third levels of a food web are known as
What are consumers?
Certain animal populations like elephants, alligators, and hippos are best suited for the quadrat method because attempting to mark and recapture would be too ____________.
What is dangerous, difficult, hard, complicated?
True or False: The Mark - Recapture Method is always accurate in determining population numbers.
What is false?
__________ is transferred between organisms through consumption.
What is Energy?
An organism that eats meat only
What is a carnivore?
A scientist uses a 2 m x 2 m quadrat to sample an area. They collect data using this quadrat 3 times. Calculate the total sample area.
What is 12 m2?
Which organisms in the food chain below would be best suited for mark and recapture?
Algae --> Aquatic Insect --> Painted Turtle --> Raven
What is painted turtle?
In Yellowstone Park, when the wolves disappeared, the elk population increased and plant life decreased. How did this affect the bears?
What is less berries to eat for hibernation
An organism that eats plants only
What is an herbivore?
Which level of organism on a food web would be easiest to count using the quadrat method in a terrestrial ecosystem?
What is a primary producer?
When conducting a population study scientists determine how accurate their results are using an equation that will tell them the _______________.
What is percent error?
The name for a species that is essential to the ecosystem and if removed the entire ecosystem and organisms within it will suffer.
What is a keystone species?
The scientific term used to describe the top organism in an ecosystem.
What is an apex predator?
A scientist determines there are 3 turtles in every 1m2 of a park. Predict how many turtles there would be in a 5m2 area of the park.
What is 15 turtles?
Calculate the N (Estimated Population) value
S = 10
M = 6
R = 4