37.10 - 37.13 Species + Succession

Question 1

Species Diversity

Answer 1

generally, the more diverse a community is, the more stable it is

Question 2

How many factor sis species diversity made of

Answer 2

2

Question 3

What are the 2 factors that make up species diversity

Answer 3

Species Richness and Relative Abundance

Question 4

Species Richness

Answer 4

number of species that exist in a community

Question 5

Relative Abundance

Answer 5

the number of individuals in any species in proportion to the number of organisms in the whole community

Question 6

There is better Relative Abundance if the proportion is more _____

Answer 6

equal

Question 7

Keystone Species

Answer 7

the species in a community that plays a critical role in the maintenance of the community

Question 8

Is the keystone species the dominant species

Answer 8

not usually

Question 9

There is only one keystone species in each community
True or False

Answer 9

False

Question 10

How can you identify the keystone species in a food web

Answer 10

it is the species with the most arrows pointing away or towards it

Question 11

What is an example of a keystone species

Answer 11

sea star –> stable amount of species when present, has drastic loss of species when organism is gone

Question 12

Ecological Succession

Answer 12

the succession of ecosystems; when ecosystems replace other ecosystems

Question 13

What does ecological succession focus on

Answer 13

autotrophs

Question 14

Autotrophs are aka

Answer 14

primary producers

Question 15

Primary Succession

Answer 15

the start of ecological succession –> occurs in a place that is mostly devoid of life and nutrients

Question 16

Pioneer Organisms

Answer 16

the first organisms that succeed in the place devoid of life/nutrients

Question 17

What is the most common pioneer organisms

Answer 17

lichens

Question 18

Why are lichens the most common pioneer organisms

Answer 18

bc they break up rocks which adds nutrients, etc.

Question 19

Lichens

Answer 19

two organisms that are often mistaken as one because of their strong symbiotic relationship

Question 20

What are lichens made of

Answer 20

a photosynthetic organism and fungus

Question 21

After lichens, what is the most common secondary organism

Answer 21

mosses which is able to break rocks and add nutrients to the soil better than lichens

Question 22

After mosses what is the most common next organism

Answer 22

grasses

Question 23

What organism comes commonly after grasses

Answer 23

Bushes and Shrubs

Question 24

What is the last organism to usually develop

Answer 24

trees

Question 25

Climax Community

Answer 25

either the final stage of ecological succession or when organisms have reached stability

Question 26

Can the climax community be disturbed

Answer 26

yes

Question 27

Secondary Succession

Answer 27

community that rises after a disturbance in the area

Question 28

Does secondary succession start from barren land

Answer 28

no

Question 29

Does secondary succession start with lichens

Answer 29

no

Question 30

Can secondary succession only occur after the climax community is reached

Answer 30

no it can occur before

Question 31

is secondary succession ecological succession

Answer 31

yes s

Question 32

Invasive Species

Answer 32

organisms that are brought to communities that they are not native

Question 33

Invasive Species are brought by

Answer 33

humans

Question 34

___% of the time an invasive species dies

Answer 34

90

Question 35

___% of the tie the invasive species lives

Answer 35

10

Question 36

__% of the 10% of the invasive species that lives is harmful and causes problems

Answer 36

1

Question 37

What is an example of an invasive species

Answer 37

A brown tree snake which was brought on a cargo plane to guam and killed off many native birds, lizards, and cuts power lines