Trophic Levels and Food Webs Flashcards

1
Q

What make up the trophic levels of an ecosystem

A

producers and consumers

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2
Q

How many levels of consumers are there

A

4

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3
Q

What are the trophic levels that energy progresses through

A
producers
primary consumer
secondary consumer 
tertiary consumer
quaternary consumer
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4
Q

Food webs show ……. relationships

A

complex

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5
Q

Do food chains also show detrivores/decomposers

A

yes

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6
Q

Mushrooms are ………

A

decomposers

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7
Q

What is the importance of mushrooms

A

our forests could not survive without them

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8
Q

Population growth can upset the …….. of an ecosystem

A

balance

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9
Q

What are the limiting factors on population

A
food
space 
competition
shelter
disease
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10
Q

Carrying capacity

A

initial period of exponential growth

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11
Q

Limiting factors in populations can growth to ……. and eventually …….

A

slow;stop

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12
Q

When does population stabilizes

A

when carrying capacity is reached

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13
Q

Food web dynamics are affected by what

A

changes in predator and/or prey populations

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14
Q

Predator/Prey dynamics allow different ……. to occupy the same ecosystem

A

predators

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15
Q

Does the elimination of one species affect other species

A

yes

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16
Q

What will happen to prey populations if the predators is removed

A

prey will overpopulate

17
Q

Elimination of species can also affect….

A

other predators in a food web

18
Q

What are the types of trophic pyramids

A

pyramid of numbers
pyramid of biomass
pyramid of energy

19
Q

Pyramid of numbers show what

A

total organisms in each population in an ecosystem

20
Q

Pyramid of numbers show the relationship between ……..

A

different populations

21
Q

The bottom of the pyramid of numbers of the ……. level in most cases

22
Q

Pyramid of biomass show

A

amount of biomass at each trophic level

23
Q

Pyramid of biomass does not count for….

A

energy lost due to metabolism

24
Q

Where is most biomass in the pyramid of biomass

A

bottom level

25
Which is the most useful pyramid
the pyramid of energy
26
What does the pyramid of energy show
direct energy distribution
27
The pyramid of energy also shows amount of energy
consumer/lost by organisms at each level
28
What is the percentage of energy that is passed on at each level
10-15%