WorksheetsUnit 1 Task 5: A Chain of Resources
Total questions: 31
Worksheet time: 36mins
A species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.
Keystone Species
Indicator Species
Limiting Factor
Trophic Cascade
The contact or effect that humans have on an environment.
Apex Predator
Death rate
Biodiversity
Human Impact
The number of births in a population in a certain amount of time
Death rate
Population Density
Biodiversity
Birthrate
Each step in a food chain or food web
Trophic Cascade
Riparian Zone
Trophic Level
Apex Predator
The number of individuals in an area of a specific size
Indicator Species
Birthrate
Death rate
Population Density
The top predator in an ecosystem
Apex Predator
Human Impact
Immigration
Trophic Level
Land next to the stream, starting at the top of the bank, with heavy plant cover on either side
Trophic Level
Biodiveristy
Riparian Zone
Limiting factor
Largest number of individuals of a population that a environment can support
Population Density
Carrying Capacity
Indicator Species
Limiting factor
The variety of species living within an ecosystem can determine the health of an ecosystem
Death rate
Birthrate
Biodiversity
Human Impact
Movement of individuals out of a population
Immigration
Death rate
Birthrate
Emigration
The number of deaths in a population in a certain amount of time
Population Density
Death rate
Birthrate
Human Impact
An ecological situation triggered by the addition or removal of a top predator which results in dramatic changes to the ecosystem involving both biotic and abiotic factors.
Trophic Cascade
Keystone Species
Trophic Level
Limiting Factor
An environmental factor that causes a population to stop growing or decrease in size
Limiting Factor
Carrying Capacity
Trophic Cascade
Riparian Zone
Species that serve as early warnings that an ecosystem is being damaged
Carrying Capacity
Indicator Species
Keystone Species
Apex Predator
Moving into a population
Biodiveristy
Emigration
Apex Predator
Immigration
If there was a wildfire in the forest that destroyed the plant life, what would happen to the herbivore population?
Herbivores would decrease due to a lack of food
Herbivores would increase due to an increase of food
Herbivores would not be affected
Herbivores would decrease due to an increase in predators
Can a population go over its carrying capacity?
Yes
No
Maybe
What happens if a population goes over its carrying capacity?
It will continue to grow
It will eventually decrease due to a lack of resources
It will die immediately
It will get unlimited resources
Choose the 4 limiting factors.
Food
Water
Time
Space
Weather
This may cause a population to increase
increase of food supply
removal of predators
removal of disease
all of these
A scientist was studying a population of fish in a pond over a period of 10 years. He observed that the population increased each year for 3 years, and then remained nearly constant for the rest of the study. The best explanation for this observation is that the population had
stopped reproducing
reached carrying capacity
mutated into a different species
run out of food and all died
Overpopulation, pollution, burning fossil fuels, and deforestation are all examples of human impact.
True
False
Which one of the following keystone examples play a vital role in the health of coastal kelp forests?
starfish
sea otters
beavers
wolves
Pride of Lionesses
Why are bees considered a keystone species?
The honey they make supports the bear population
They pollinate flowers that produce fruit which supports the ecosystem
They sting when threatened
They live in hives
A certain ecosystem has very high temperatures, low precipitation, little available food, and sparse vegetation. This statement best describes
Biotic Factors
Abiotic Factors
Limiting Factors
Carrying Capacity
Births, Deaths, Immigration and Emigration all cause a population to change.
True
False
When wolves were removed from Yellowstone and the Elk population grew it set into motion a trophic cascade that caused which of the following to happen?
Beaver population disappeared
Riparian zones became damaged
Willow, cottonwood and aspen trees were overgrazed
all of these
The introduction of wolves to Yellowstone did NOT have an impact on the rivers.
True
False
In 1906 President Roosevelt and the forest service created the Grand Canyon National Game Preserve and killed the Kaibab deer's natural predators in order to decrease the deer population keep it from exceeding the carrying capacity .
True
False
A keystone species does NOT have to be an apex predator.
True
False
