Lesson 6.3.2b
6.3.2b Sustainability and ecosystem management Quiz: OCR Biology, Unit 9
20 questions
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Lesson 6.3.2b, Sustainability and ecosystem management: 20 multiple choice questions for the OCR Biology (H020), Unit 9: Ecosystems, written with Revision Ninja.
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The 20 questions
-
Which process involves active management of ecosystems to maintain biodiversity?
- Succession
- Afforestation
- Conservation
- Preservation
-
What term describes the maximum harvest taken repeatedly without reducing stock size?
- Ecosystem yield
- Biotic potential
- Maximum sustainable yield
- Carrying capacity
-
Why are minimum mesh sizes enforced in commercial fishing nets?
- Protect juvenile fish
- Reduce net weight
- Filter microplastics
- Increase total catch
-
Which woodland management technique cuts trees to ground level in rotation?
- Monoculture planting
- Clear-felling
- Coppicing
- Deforestation
-
Which conservation motive is based on maintaining natural resources for long-term income?
- Ethical reason
- Aesthetic reason
- Economic reason
- Ecological reason
-
Which concept forms the basis of an ethical argument for species conservation?
- Medicinal discovery
- Intrinsic value
- Ecotourism revenue
- Soil protection
-
What term describes a period when fishing is banned to permit breeding?
- Fishing quota
- Closed season
- Catch limit
- Minimum mesh
-
A fishery has a stock of 10,000 tonnes that grows by 10% per year. What is a sustainable annual yield?
- 100000 tonnes
- 100 tonnes
- 10000 tonnes
- 1000 tonnes
-
A woodland is managed on a 10-year rotation so that one tenth of it is felled each year. What fraction of the woodland is felled each year?
- 100%
- 1%
- 10%
- 50%
-
What is the primary biological reason for introducing a closed fishing season?
- Repair fishing nets
- Reduce harbour traffic
- Protect breeding fish
- Lower market prices
-
A reserve bans hunting and building. Which management strategy is this?
- Intensive farming
- Commercial forestry
- Sustainable harvesting
- Preservation
-
Which human activity causes the direct loss of a reed bed habitat?
- Biological control
- Drainage of wetlands
- Sustainable coppicing
- Crop rotation
-
What is the main aim of setting strict commercial fishing quotas?
- Expand net size
- Maintain stable stock
- Eliminate top predators
- Maximise initial profit
-
Which concept considers the moral duty of humans to protect species?
- Ecosystem services
- Economic value
- Resource depletion
- Environmental ethics
-
Why is replanting trees after timber harvesting essential for sustainability?
- Increases soil erosion
- Prevents natural selection
- Ensures resource regeneration
- Reduces atmospheric oxygen
-
Why is calculating maximum sustainable yield for fish stocks difficult?
- Uniform fish age
- Constant ocean currents
- Fixed birth rates
- Uncertain stock size
-
A fishery has a stock of 8000 tonnes that grows by 10% in a year. The catch is 900 tonnes. What is the net change in the stock?
- +900 tonnes
- -100 tonnes
- +100 tonnes
- -800 tonnes
-
Why might a fish population collapse despite strict mesh size regulations?
- Plankton blooms multiply
- Fish mature faster
- Water salinity increases
- Total catch excessive
-
Why is clear-felling ecologically damaging even if trees are replanted?
- Increases leaf litter
- Causes biodiversity loss
- Accelerates succession
- Decreases light intensity
-
A 500 ha reserve has 20% of its area managed on a 10-year felling rotation. How many hectares are felled each year?
- 2 hectares
- 100 hectares
- 50 hectares
- 10 hectares
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