D4.2

Question 1

Define stability as a property of an ecosystem.

Question 2

Describe an example of a stable ecosystem.​

Question 3

Outline requirements for stability in an ecosystem.

Question 4

Outline types of environmental change that can interfere with ecosystem stability.

Question 5

Define “tipping point” in relation to ecosystem stability.

Question 6

Discuss the impact of Amazon deforestation as an example of an ecosystem at a tipping point.

Question 7

Define mesocosm.

Question 8

Outline requirements of setting up a sustainable mesocosm.

Question 9

Discuss the benefits and limitations of using mesocosms as models of ecosystems.​

Question 10

State the role of a keystone species in an ecosystem.

Question 11

Outline an example of a keystone species in an ecosystem. ​

Question 12

Describe requirements for sustainability in ecosystems.

Question 13

Define resource harvesting.

Question 14

Define sustainable in relation to resource harvesting.

Question 15

Discuss the sustainable resource harvesting of a marine fish.

Question 16

Assess the sustainability of resource harvesting by identifying the maximum sustainable yield of a resource on a population growth curve.

Question 17

Discuss the sustainable resource harvesting of a terrestrial plant.

Question 18

Discuss factors that negatively impact the sustainability of agriculture.

Question 19

Discuss causes and effects of ecosystem eutrophication.

Question 20

Outline the process of biomagnification.

Question 21

Discuss the cause and effect of mercury biomagnification in an ecosystem.

Question 22

Discuss the cause and effect of DDT biomagnification in an ecosystem.

Question 23

Define biodegradable.

Question 24

State that plastics are not biodegradable.

Question 25

Define microplastic and macroplastic.

Question 25

Discuss the cause and effect of microplastic pollution on an ocean ecosystem.

Question 25

Define rewilding.

Question 26

Discuss the methods of restoration of an ecosystem by rewilding.

Question 27

Outline the rewilding of the Hinewai Reserve in New Zealand.​

Question 28

Outline the cause and effect of ecological succession.

Question 29

Outline an example of reciprocal interactions between living organisms and the abiotic environments that cause ecological succession.

Question 30

State an example of ecological succession triggered by an abiotic factor.

Question 31

State an example of ecological succession triggered by a biotic factor. ​

Question 32

Describe changes occurring during primary succession in a community, including increases in size of plants, amount of primary production, species diversity, complexity of food webs and amount of nutrient cycling.​

Question 33

Explain an example of cyclical succession in an ecosystem.​

Question 34

Define climax community and plagioclimax.

Question 35

Discuss the impact of grazing my farm livestock on arresting succession in a community.

Question 36

Discuss the impact of drainage of wetlands on arresting succession in a community. ​