Ecology Flashcards
What is an autotroph?
An organism that produces its own food using photosynthesis.
What does abiotic mean?
Non-living
What is nitrogen fixation?
Process where bacteria turn nitrogen into a form that plants can use (ammonia), process where nitrogen gas in the atmosphere is converted into nitrates.
Can matter be recycled?
Yes
Can energy be recycled?
No
How much energy is passed onto the next consumer in a food pyramid/tropic level?
10%
What is the first level of an energy pyramid or food web/chain?
Producer, can produce its own food using photosynthesis.
Which way do the arrows point in a food chain/web?
Towards the eater/consumer.
What is non-biodegradable?
A toxin that can’t be broken down.
What is biotic? Give an example.
Living, trees/plants
What happens to the amount of biomass as you move up the pyramid?
Only 10% moves on, it decreases.
What happens to the number of individual organisms as you move up the pyramid?
It decreases
The unused energy from each tropic level is lost as_____into the environment.
Heat
What is the name of the nutrient cycle that removes CO2 from the atmosphere?
The carbon cycle
In the nitrogen cycle, how is nitrogen converted into a usable form?
Nitrogen fixation by lightening or nitrogen fixation by bacteria.
What is primary succession?
Starts where no soil exists, after volcanic activity or glaciers that melt.
What is secondary succession?
Succession that occurs after a disturbance.
What is an example of a pioneer species?
Lichens
When one organism benefits and the other is harmed this is a___________relationship.
Parasitic
When two organisms benefit from the relationship this is____________.
Mutualism
When one organism benefits and the other is not harmed or helped/affected this is a_______________relationship.
Commensalistic
What is carrying capacity?
The maximum amount of species an ecosystem can support.
What is logistical growth?
Slow steady growth.