GSS sep7-9 Flashcards
How do earthworms help cycle matter through the ecosystem?
They break down dead material, releasing nutrients for use again.
________ percent of energy moves on to the next trophic level, the rest is lost as ___________.
10, heat & waste
Check all that are abiotic factors in an ecosystem.
water, weather and air
Why might omnivores be particularly adapted to changes in an environment?
Their energy sources are the most plentiful in an ecosystem
Organisms of the same species can ________________.
reproduce
Deer live in family groups which is an example of _________.
clumped distribution
Eats dead plant/animal matter
Decomposer
Only eats plants
Herbivore
Eats both plants and animals
Omnivore
Only eats other animals
Carnivore
Eats dead animals
Scavenger
Check all that are biotic factors in an ecosystem.
human activities and available food sources
When individuals exit a population they __________________, when they come in they _________________.
emigrate, immigrate
Owl and rat
Competition
A crab with a sea urchin on its back
Mutualism
An oak tree and a robin making a nest
Mutualism
A tapeworm living in a dog
Parasitism
Two or more organisms fighting over resources
Competition
If the primary consumers in a food chain become extinct, what will most likely happen?
The secondary consumers will also die out.
What city would have the HIGHEST population density?
LA
Species that keeps others in check
Keystone Species
Communities are replaced over time by new ones
Succession
Restart on old ecosystem
Primary Succession
Occurs when communities form on a surface that was previously unoccupied by organisms
keystorn
First organisms to colonize an area
Pioneer Species
