Ecosystem Roles
All producers are this type of organism.
Plants
The energy for photosynthesis comes from ....
the sun
grain -----> mouse-----> snake -----> owl
The primary consumer is the .....
mouse
How much energy gets passed along at each level of a food chain?
10%
What would happen if all the producers suddenly disappeared from the food web?
Everything would die.
Detrivores break down this substance.
Animal Waste
carbon dioxide
plankton ---->minnow---->bass----->trout
If a chemical is introduced into this food chain, which organism would have the greatest concentration of the chemical.
trout
* Stored
* Changed to heat
* Used by the organism for life processes (eg. breathing, digesting food)
An example of a detrivore is ......
These organisms eat both plants and animals.
The 'food' that plants produce for themselves during photosynthesis.
glucose
All levels!
Why are there usually no more than 4 levels in a food chain?
Not enough energy to go around
An example of a scavenger is a .....
e.g., vulture, buzzard, crow
Animals that eat only plants are called....
A biproduct of photosynthesis that animals need to survive.
oxygen
What do the arrows in a food chain/web represent?
The flow of energy and nutrients.
Why are there always more producers in a food web?
They need to bring in all the energy needs of the food web (a lot of energy gets 'lost')
An example of a decomposer is a .....
bacteria, fungus, earthworm
Animals that eat already dead material are called...
scavengers
This green pigment must be present in order for the photosynthesis reaction to take place.
chlorophyll
Decomposers are important because.....
..they break down matter and return valuable nutrients to the soil.
Energy for any food chain/web initially comes from...
...the sun.
Microbes such as bacteria, viruses, and fungi are beneficial to ecosystems because....
....when they cause diseases, they actually make populations stronger (more resistant).