Unit 3 Topic 2 - Renewable resources

Question 1

what are the 3 types of resource?

Answer 1

metallic, nonmetallic and energy

Question 2

what are the 4 types of ecosystem service?

Answer 2

• provisioning (we get resources i.e. food)
• supporting (necessary for other services i.e. photosynthesis, seed dispersal)
• regulating (benefits from maintaining ecosystem, i.e. making/maintain soil, water purification)
• cultural (not material benefits, science, culture, ecotourism)

Question 3

how do people depend on harvestable resources?

Answer 3

most developed societies only extracts fish directly from the environment for food, bc of agriculture or cropping. damage to provisioning services affects undeveloped communities more severely as they rely on the ecosystem for food.

Question 4

what is a renewable resource

Answer 4

a resource that replenishes within the time it takes to be consumed

Question 5

give examples of renewable energy source (8)

Answer 5

-solar (photovoltaic cells or solarthermal)
-wind
-hydro
-geothermal
-wave
-tidal
-biomass combustion (only if renewal rate>/=consumption rate)
-hydrogen fuel cells (electrolysis turns chemical energy into electrical, only water is produced

Question 6

what is dryland salinity and how can it be managed?

Answer 6

rising water table becomes salty as it passes layers of salt in the soil profile. happens when deep rooted native vegetation is cleared.

mitigate by planting native vegetation with deep roots to keep the water table below salt levels to crops are not killed.

Question 7

how do you calculate maximum sustainable yield of a fishery (MSY)

IGNORE THIS FLASHCARD IT IS PENDING ANTONIUS’ ANSWER

Answer 7

R+G-M
R= biomass of young fish reaching harvestable size
G=growth in biomass of already harvestable fish
M= loss of biomass from death/emigration

Question 8

what is the purpose of collecting baseline data

Answer 8

it gives an indication of ecosystem conditions before extraction begins, so companies are held accountable to standards of rehabilitation.

Question 9

how can mineral/energy resources be extracted (6 ways)

Answer 9

-dredging
-open cut mine
-onshore/offshore drilling
- fracking
- room and pillar (underground, surrounding rock cannot support cavity without pillar supports)
- stoping (underground, surrounding rock is strong enough for large cavities to be excavated without collapsing, no support or artificial support used)