24.5 Suatainability

Question 1

Definition of sustainable resource

Answer 1

a renewable resource that is being economically exploited in such a way that it will not diminish or run out of

Question 2

What are the aims of sustainability

Answer 2

-preserve the environment
-ensure resources are available for future generations
-allow humans in all societies to live comfortably
-enable less economically developed countries (LEDCs) to develop, through exploiting their natural resources
-create a move even balance in the consumption of these resources between more economically developed countries (MEDCs) and LEDCs

Question 3

What are the aims of sustainability

Answer 3

-preserve the environment
-ensure resources are available for future generations
-allow humans in all societies to live comfortably
-enable less economically developed countries (LEDCs) to develop, through exploiting their natural resources
-create a move even balance in the consumption of these resources between more economically developed countries (MEDCs) and LEDCs

Question 4

What are the 3 layers of a UK woodland?

Answer 4

-Canopy
-Shrub layer
-Forest floor

Question 5

What are threats to UK woodland?

Answer 5

-converted to agricultural land
-development- housing
-logging
-pollution - acid rain
-global warming
-damage to bark by grey squirrels
-deer browsing

Question 6

What does good forestry practice look like in sustainable timber production?

Answer 6

-coppicing part of a wood each year - use rotational coppicing
-use selective cutting rather than clear felling (cutting whole tree)
-provide a long rotation time
-when planting, match tree species to the climate, landscape and soil type
-manage habitats for declining populations
-plant trees the best distance apart to reduce competition = higher yields of wood per tree
-control pests, pathogens and invasive species
-practise selective culling (mass animal killing)
-replace trees through replanting rather then waiting for natural regeneration

Question 7

How does rotational coppicing maintain biodiversity?

Answer 7

The tree never grows enough to block light. Succession cannot occur and more species can survive

Question 8

What is rotational coppicing?

Answer 8

-woodland is divided into sections and trees are only cut in a particular section until all have been coppiced. Coppicing then begins in another area allowing time for newly coppiced trees to grow. This continues until you reach the trees that were first coppiced

Question 9

What are the treats to sustainable fishing?

Answer 9

-overfishing
-catching fish before they reproduce
-pollution
-dredging
-

Question 10

What are examples of good fishing practice?

Answer 10

-increase size of holes in nets, immature fish can escape and eventually reproduce
-fishing quotas provide limits on the numbers of certain species of fish
-protected endangered species
-rotational fishing (physically by only fishing in certain areas, seasonal eg. tuna in summer)
-allowing commercial and recreational fishing only at certain times of times year, this protects the breeding season of some fish species

Question 11

Uses of fish

Answer 11

-food
-importance of omega 3 fatty acids