10.3 4 Managing biological resources

Question 1

when we farm

Answer 1

remove crop before plants die and decompose-break natural cycles that return minerals to the soil

Question 2

monoculture

Answer 2

one crop is grown over a large area -absorb large quantities of particular minerals

Question 3

artificial fertilizers

Answer 3

do not support the structure of the soil

Question 4

if fish too many fish or fish at wrong time

Answer 4

cannot breed to replenish the population-fishing becomes unsustainable

Question 5

what is causing the large-scale depletion of fish stocks (6)

Answer 5

1. Size of global fishing fleet-too many ships
2. Open-ocean factory fish take up huge catches of fish often including species that are not wanted
3. Techniques such as bottom trawling -nets dragged along sea bed damage habitat and catch species not wanted
4. enormous drift nets catch many species
5. Nets with small mesh sizes that catch immature fiah
6. Fishing through the breeding seasons

Question 6

other factors effecting the fish population

Answer 6

global water temperatures,levels of pollution and number of natural predators

Question 7

considerations

Answer 7

easy to condemn as a rich countries

may be only way of getting food healthcare education

Question 8

sustainability

Answer 8

demands a decent standard of living for everyone without compromising the needs of future generations or the ecosystem around us

Question 9

biggest producers of greenhouse gas emission

Answer 9

energy supply

Question 10

conserving fish stocks

Answer 10

controlling mesh size so only largest fish are caught
banning fishing during the breeding season
imposing quotas
encouraging fishing methods that are less damaging
banning endangered species from being fished

Question 11

Fish farms/aquaculture

Answer 11

not carbon neutral ,use electricity and produce greenhouse gases
food often is fish from overfishing