Week 6

Question 1

What is a food chain

Answer 1

A model that shows the flow of energy in an ecosystem

Question 2

What is the source of energy to producers?

Answer 2

The sun

Question 3

What are levels on the food chain called

Answer 3

Tropic

Question 4

What would happen if the producers population size is reduced?

Answer 4

The populations of the consumers would fall

Question 5

What would happen to the population size if the primary consumer is reduced?

Answer 5

The population of the producers would do well and the secondary consumers will starve and compete more

Question 6

What happens if the secondary consumer is reduced

Answer 6

If the secondary consumer is reduced the primary consumers will do well and maybe over populate and overeat producers and starve too

Question 7

If the tertiary consumers were reduced

Answer 7

The secondary consumers would eat more of the primary consumers

Question 8

How much of the energy pyramid do producers get

Answer 8

100%

Question 9

What percent do primary consumers get?

Answer 9

10%

Question 10

How much percent do secondary consumers get?

Answer 10

1%

Question 11

How much do tertiary consumers get

Answer 11

0.1%

Question 12

What percent of energy is transferred to the next tropic level?

Answer 12

10%

Question 13

What is the other 90% of the energy used for in organisms

Answer 13

The energy is used for living, growing and reproducing

Question 14

Why are food charts important

Answer 14

They show how organisms depend on each other for energy

Question 15

What does S stand for?

Answer 15

Richness

Question 16

What does richness measure

Answer 16

Total number of species in an ecosystem

Question 17

What doesn’t richness take into account

Answer 17

Number of individuals proportion or distribution of each species within the ecosystem

Question 18

What does H stand for?

Answer 18

Shannon diversity index

Question 19

What is the Shannon diversity index and what does it account for?

Answer 19

It accounts for species abundance by calculating proportion of individuals compared to total number of individuals in the community

Question 20

What is the formula for H or the diversity index

Answer 20

H= -SUM (Pi * ln (Pi))

Question 21

What does Pi in the diversity index stand for?

Answer 21

Species abundance/total abundance in the community

Question 22

What does Ln stand for?

Answer 22

Natural log

Question 23

What does E stand for m

Answer 23

Measure my to compare abundances of each species in the community

Question 24

What does a low value of evenness mean?

Answer 24

One or a few species dominate

Question 25

What does a high value of evenness mean?

Answer 25

All species in community have similar abundances

Question 26

What does evenness values range from?

Answer 26

0 to 1

Question 27

What does a 0 evenness signify?

Answer 27

Low evenness

Question 28

What does a 1 signify in evenness?

Answer 28

It signifies complete evenness

Question 29

Why is the formula for evenness?

Answer 29

E=H/Hmax

Question 30

What does H stand for in the evenness formula?

Answer 30

Diversity index

Question 31

What does Hmax stand for in the evenness formula?

Answer 31

Highest possible diversity value for community t

Question 32

What should you record in your journal

Answer 32

Recent weather, habitat description, length of time in field

Question 33

What is a effective non destructive way of sampling organisms

Answer 33

Using photos

Question 34

What is important about taking photos in the field

Answer 34

Not disturbing wildlife or putting yourself in dangerous situations

Question 35

What should you do to make sure you can determine the size of the object in the photo

Answer 35

Use and object for scale like a ruler

Question 36

How do you make photos correspond with notes

Answer 36

Include photo reference number

Question 37

How fast you measure abiotic factors

Answer 37

You make a climate graph

Question 38

What is sampling

Answer 38

The process of selescting part of something with intent of representing whole.