Vocab
A group of individuals of the same species inhabiting the same area is the definition for
Population
The energy for use by organisms in Level 1 of an energy period originally comes from
The sun
What is the difference between a food chain and a food web?
A food web is all the food chains in an ecosystem combined.
Food chain= simple
Food Web= Complex
Name the 3 types of Symbiosis
Commensalism
Mutualism
Parasitism
Why is November 22nd an important day?
Notebook Check
Pitcher Plants are found in Tropical Rainforests. Which organisms break down dead and organic matter in the rain forest?
Decomposers
Which trophic level contains the least amount of energy?
Top level - Trophic level 4
What organisms supply energy for all other organisms?
Autotrophs/ Producers
The relationship between the mice and the insects is an example of
Predator - prey
Soil acidity is one of the abiotic factors that determine which plants grow in that soil. Which soil pH range is considered the most acidic?
a. 4.5-5.5
b. 7-8
c. 10.5-11.5
d. 13-14
A
Niche
What happens to the energy when it is moved up through the trophic levels?
Which set of food chains show the transfer of energy correctly?
A. insect-> mouse -> cougars
B. snake-> mouse-> grasses
C. grasses-> snake -> shrew
D. grasses-> rabbit-> cougar
A & D
Mistletoe extracts water and nutrients from the spruce tree and causes it to lose needles. What type of symbiosis does this represent?
Parasitism
Treatment with an herbicide has greatly reduced the amount of clover in an ecosystem. How would that affect the great horned owl?
Hint: Clover-> Mice-> Great Horned Owl
The population of great horned owls would decrease.
The resources in an ecosystem are limited (Limiting Factor)
In a forest ecosystem, which trophic level does the Red Fox belong to?
Level 3 or Level 4
How would a large decrease in microscopic marine algae effect an Ocean Food Web?
There will be fewer marine animals because there will be fewer producers
Epiphytes are examples of what type of Symbiosis?
Commensalism
1000 Times faster
Competition
Which trophic level is most likely missing from an ocean floor food web at a depth of 800 meters.
Hint: Sunlight only travels to a depth of 200 meters
Producers
The populations of cougars and other large predators have decreased throughout the US. This disruption of the natural food web will most likely lead to
A decrease in prey animals
Skunks often live in burrows that have been dug and abandoned by woodchucks. What type of symbiosis does this represent?
Commensalism
What is the relationship between photosynthesis and respiration?
They are opposite.