Succession and Extinction

Question 1

Ecological succession

Answer 1

a gradual pattern of change that occurs in an ecosystem after a disturbance

Question 2

Ecosystems respond in …….. pattern

Answer 2

predictable

Question 3

What are the types of succession

Answer 3

primary and secondary succession

Question 4

Primary succession

Answer 4

occurs in surfaces where there is no soil left after the disturbance

Question 5

What are the causes of primary succession

Answer 5

volcanic eruption

glacial movement or melting

Question 6

Secondary succession

Answer 6

occurs on surfaces where soil remains

Question 7

What are human and natural influences

Answer 7

wildfires
clear-cutting
climate change
introduced species

Question 8

Pioneer species

Answer 8

first species to populate an area after a disturbance

Question 9

Climax community

Answer 9

a stable community that experiences little succession

Question 10

Whale fall community

Answer 10

whales die and fall to ocean floor 
scavengers feed on carcass 
new community feeds on remaining tissue
decomposition enriches the soil
bacteria feed on oil in bones

Question 11

What is the importance of species diversity

Answer 11

maintains a healthy ecosystem

Question 12

What is the importance of genetic diversity

Answer 12

encourages health of species

Question 13

What is the importance of material resources

Answer 13

provides raw materials

Question 14

Threats to biodiversity

Answer 14

habitat loss
poaching
introduced species
pollution

Question 15

Loss of species diversity

Answer 15

loss of one species could affect many others

species rely on each other for survival

Question 16

Loss of genetic diversity

Answer 16

reduced options for mates leads to interbreeding

species become more susceptible to disease

Question 17

Extinct species

Answer 17

species that completely disappeared

Question 18

Endangered species

Answer 18

species at risk of becoming extinct

Question 19

Threatened species

Answer 19

species at risk of becoming endangered

Question 20

Conservation

Answer 20

the planned management of natural resources to ensure sustainable use

Question 21

1800s

Answer 21

National parks

Question 22

1900

Answer 22

Lacey Act

Question 23

1973

Answer 23

Endangered Species Act

Question 24

1975

Answer 24

CITES

Question 25

Lacey Act

Answer 25

banned trafficking in illegal wildlife

Question 26

Endangered Species Act

Answer 26

protects imperiled species

Question 27

CITES

Answer 27

treaty to protect endangered animals and plants