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IB ESS HL 2.2.23 Primary Productivity Question Bank

Calculate and interpret primary productivity and its ecological significance.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • identify the productivity or efficiency quantity
  • apply the appropriate calculation and units
  • interpret the ecological consequence of the result

2.2.23 (HL)—Primary productivity question 1

[Maximum number: 2]
Copperbelt land use in 1972

Figure:Copperbelt land use in 1972

Copperbelt land use in 2000

Figure:Copperbelt land use in 2000

Figure:Copperbelt land use in 2000

Figures: Copperbelt land-use change in 1972 and 2000 land use changed from 1972 to 2000: agriculture/scattered dwellings/mixed vegetation increased from 40% to 59%; woodlands decreased from 56% to 32%; plantations increased from 0% to 4%.

Figure:Mining in Zambia and Copperbelt impacts

- Figure: Mining in Zambia and Copperbelt impacts: 84% of Zambia export income comes from mining, although there are efforts to increase income from agriculture and manufacturing.
- Most mining occurs in the Copperbelt and Northwestern Provinces; Zambia is a major producer of copper and cobalt.
- Historic mining in Copperbelt Province has left 21 waste rock dumps, 9 slag heaps and 45 tailing dams with toxic metal concentrations.
- The Kafue River supplies local communities; young Tilapia are unable to survive near mining areas in the Kafue River.
- Mining activity in Copperbelt Province has supported an increase in local population.

Figure:Fact file on Zambia

- Figure: Fact file on Zambia: Zambia has approximately 14.64 million people and an annual population growth rate of 2.8%.
- Indigenous forest covers approximately 491348 km^2; wood fuel contributes about 80% of domestic energy consumption.
- Zambia has abundant wildlife, forests, water resources and mineral deposits.

Identify four factors that would affect the primary productivity of forest plantations in the Copperbelt Province.

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