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
Calculate and interpret primary productivity and its ecological significance.

Figure:Copperbelt land use in 1972

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: 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: 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.
amount of sunlight/solar light/insolation; amount of rainfall/precipitation/irrigation system; temperature;
competition for space; adequate nutrients/minerals/suitable soil/addition of fertilizers;
level of pests/disease/use of pesticides; type of tree that is planted/suitability of tree crop to the local climate conditions;
Human impacts through metal pollution in soil/water supply / impacts of acid rain on plants/soil / climate change/global warming;
Marking guidance:
Accept any other reasonable points.
Award [1] for two or three correct responses and [2] for four correct responses.