food web
What is an organism called when it makes it own food though Photosynthesis?
What is producer
Predators help control the population of this Trophic level.
What is Herbivores or primary consumers.
If a keystone species is removed, the ecosystem may become this.
What is unstable.
Only about this percentage of energy transfers from one Trophic level to the next.
What is 10%
if plants increase first, affecting all the higher levels, what type of control is occurring?
What is bottom-up control.
An organism that eats both plants and aimals?
What is an omnivore
What often happens to herbivores when top predators are removed?
What is Increase.
a Keystone predator keeps prey populations from doing this.
What is Overpopulating.
As you move up the Trophic levels, available energy does what?
What is Decrease.
If predator populations change first and affect lower levels, what type of control is occurring?
What is top-down control.
What shows all the feeding relationship in an ecosystem?
What is a food web
What happen to plant populations when Herbivores increase?
What is decline.
if a keystone predator disappears, competition among prey species will most likely do this?
What is Increase.
A decline in producers would directly affect what Trophic level?
What are primary consumers
in bottom-up control, where do changes usually start?
What are producers.
This level of the food chain contains plants and algea
What is the first Trophic level
When predators indirectly affect plant populations by controlling herbivores, this is called?
What is Trophic cascade.
when a keystone species is removed, some species may be endangered because of this.
What is loss of balance or over competition.
Why do Herbivores outnumber Carnivores?
What is because more energy is available at the lower Trophic levels.
in top-down control, predators influence plant populations. How?
What is controlling herbivores.
This type of consumer eats primary consumers
What is secondary consumer
This type of ecosystem control starts from the top Trophic level and moves down.
What is top-down control.
A keystone species supports ecosystem stability mainly through?
What are population size and species interactions.
Why do Apex predators not produce as much as primary consumers?
What is far less energy is available on top of the food chain.
A major nutrient increase would most likely affect this Trophic level first.
what are producers.