Topic 8: 8.3 Tropical rainforests are threatened directly by deforestation and indirectly by climate change — Edexcel GCSE Geography B
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Topic 8: 8.3 Tropical rainforests are threatened directly by deforestation and indirectly by climate change explained
Topic 8: 8.3 Tropical rainforests are threatened directly by deforestation and indirectly by climate change covers 2 specification points, including Commercial hardwood logging, subsistence and… and B.
Read the full explanation
Why climate change is an indirect threat to…. Open a point below for its explanation and revision guidance.
a. Causes of deforestation: commercial hardwood logging, subsistence and commercial agriculture, local demand for fuel wood and how demand for biofuels, mineral resources and electricity (HEP) contribute to deforestation.
Deforestation is the permanent removal of forest cover; this statement asks you to explain its causes in tropical rainforests. Commercial hardwood logging removes high-value trees such as mahogany, and new roads then open forest to clearance. Subsistence agriculture is small-scale clearance for family food, while commercial agriculture clears land on a large scale for cash crops or cattle. Local demand for fuel wood means people cut trees for cooking and heating. Biofuels, mineral resources and electricity (HEP) also contribute: palm oil plantations expand for biofuel, mining needs cleared land and access roads, and hydroelectric dams flood forest.
b. Why climate change is an indirect threat to the health of tropical rainforests (ecosystem stress, drought).
Climate change is an indirect threat because it weakens rainforests over time rather than removing trees directly. Rising temperatures and changing rainfall create drought, lowering soil moisture so trees become more stressed. Ecosystem stress means species, including canopy trees, photosynthesise less and recover more slowly from damage. Drought also raises fire risk and tree death, leaving forest more open to disease and clearance. Write each link as a chain: climate change, then drought, then ecosystem stress, then loss of health.
Your focus
- Identify the four main groups of causes of deforestation in this statement, with at least one example for each.
- Explain how commercial hardwood logging and subsistence or commercial agriculture remove tropical rainforest.
- Explain how biofuel demand, mineral extraction and HEP dams contribute to deforestation.
Show all 6 objectives
- Identify climate change as an indirect threat to tropical rainforests and distinguish it from direct deforestation.
- Explain how drought lowers soil moisture and increases stress on rainforest trees.
- Explain how ecosystem stress and drought together reduce the health of tropical rainforests.
Topic 8: 8.3 Tropical rainforests are threatened directly by deforestation and indirectly by climate change exam tips
Marking Points
- Identifies commercial hardwood logging as removing high-value trees such as mahogany, with access roads opening further forest to clearance.
- Distinguishes subsistence agriculture (small-scale clearance for family food) from commercial agriculture (large-scale clearance for cash crops or cattle).
- Links local demand for fuel wood to people cutting trees for cooking and heating.
- Explains how demand for biofuels, such as palm oil, expands plantations into forest.
- Explains how mineral resource extraction requires cleared land and access roads.
- Explains how electricity generated by hydroelectric power (HEP) dams floods large areas of forest.
- Explains climate change as an indirect threat that weakens rainforest over time rather than removing trees directly.
- Describes drought as lowering soil moisture and increasing tree stress.
- Explains ecosystem stress as reduced photosynthesis, growth and recovery in species, including canopy trees.
- Links drought to increased fire risk, tree death and vulnerability to disease and further clearance.
Examiner Tips
- 💡Write one sentence per cause that names the cause, the land use or activity, and the mechanism that removes trees.
- 💡Use the scale word (small-scale or large-scale) and purpose (family food, cash crops, export) to separate the two agricultural causes.
- 💡When a question offers options about HEP or biofuels, check that the chosen option explains the land-use change rather than only naming the energy type.
- 💡Structure the answer as a chain of linked steps: climate change, then drought, then ecosystem stress, then loss of health.
- 💡Use the words indirect and ecosystem stress precisely, and state what is being weakened.
- 💡When a question offers options about climate change, select the option that describes a process weakening the forest rather than one that describes direct clearance.
Common Mistakes
- Treats all farming as a single cause; separate subsistence clearance from commercial clearance and give the scale and purpose of each.
- Names electricity as a cause without explaining that HEP dams flood forest; state the mechanism.
- Confuses fuel wood demand with commercial timber logging; keep local cooking and heating use distinct from hardwood extraction for sale.
- Lists causes without explaining how each one removes trees; add a mechanism to every cause.
- Treats climate change as a direct cause of tree removal; state that it weakens forest indirectly.
- Describes drought without linking it to ecosystem stress or the health of the rainforest.
- Gives general global warming facts without applying them to rainforest health; connect each fact to a named effect on trees or ecosystems.