Definitions I
Define Energy Pyramid
A graphical model that shows how much energy is available at each trophic level in an ecosystem.
Define Population
Members of one species living in an area.
Define Trophic Level
A designation for an organism based on its methods of making or finding food and feeding behavior.
Define Food Chain
One pathway showing who eats whom.
Is soil a biotic or abiotic factor?
Abiotic.
Define Restoration Site
A place where ecosystem repair is occurring.
Define System
Connected parts that affect one another.
What is the trophic level (number) of the bottom of the trophic pyramid?
1st Level.
Define Food Web
Many connecting feeding pathways.
What is the source of all energy on Earth?
The Sun/Solar Energy.
Define Heat Loss
About one-tenth (10%) of energy moves to the next level.
Define Decomposers
An organism that breaks down dead matter.
What is the trophic descriptor of a 3rd level organism?
Secondary Consumer.
Where does energy flow in a food chain?
From a lower level to a higher level.
Where does heat energy go?
Into the environment.
Define Producer
Organisms that store solar energy as chemical energy.
Define Consumer
Organisms that get its energy by eating.
What is the highest level of a trophic pyramid?
4th Level/Tertiary Consumer/Top Predator/Apex Predator.
How many levels is a food chain with five organisms?
5 Levels.
Define Energy Bottleneck.
A point where too little energy moves forward.
Define Abiotic
Nonliving things.
Define Biotic
Living things.
How much energy transfers to the next trophic level?
10%
What happens to the rest of the food web if producer population decreases?
The other organisms’ population decreases.
What happens to the rest of the food web if a top predator's population decreases?
S. Consumer populations increase. P. Consumer populations decrease. Producer populations increase.
Lower-level populations change, either increase or decrease.