What are the threats to the tropical rainforest and the taiga?
The direct and indirect threats to the tropical rainforest (deforestation and climate change) and to the taiga (logging, mineral and fossil-fuel exploitation, acid rain, fire, pests and disease) and their impacts on biodiversity.
A focused answer to Edexcel GCSE Geography B Topic 8 (Forests under threat) on the direct and indirect threats to the tropical rainforest (deforestation and climate change) and the taiga (logging, mineral and fossil-fuel exploitation, acid rain, fire, pests and disease), and their impacts on biodiversity.
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What this dot point is asking
This is Edexcel GCSE Geography B (1GB0) Paper 3, Section B (Topic 8, Forests under threat). Edexcel expects you to explain the direct and indirect threats to the tropical rainforest (the causes of deforestation, and climate change as an indirect threat) and to the taiga (direct threats from logging for softwood, pulp and paper, and the exploitation of minerals, fossil fuels and HEP, and indirect threats from acid precipitation, forest fires, pests and diseases), and how these threats lead to a loss of biodiversity. Maps of forest loss (using GIS) are common resources.
Direct threats to the tropical rainforest
The biggest threat to the tropical rainforest is deforestation, the direct clearance of trees.
Indirect threats and biodiversity loss
The rainforest also faces indirect threats. Climate change is the main one: a hotter, sometimes drier climate causes ecosystem stress and drought, making the forest more vulnerable to fire and reducing its ability to recover. Because the rainforest holds the highest biodiversity of any biome, deforestation causes severe and often irreversible loss of species, many not yet discovered, and releases stored carbon, worsening climate change in a feedback loop.
Threats to the taiga
The taiga faces slower but growing threats, both direct and indirect.
Although the taiga has fewer species than the rainforest, its threats are serious because it regrows slowly (the short growing season means recovery takes decades to centuries) and it stores vast amounts of carbon in its soils and biomass, so damage is long-lasting and releases carbon.
Try this
Q1. State two direct threats to the taiga. [2 marks]
- Cue. Any two of logging for softwood, pulp and paper, mineral extraction, fossil-fuel (oil and gas) exploitation, or HEP dam construction.
Q2. Explain how climate change is an indirect threat to the tropical rainforest. [3 marks]
- Cue. A hotter and sometimes drier climate causes drought and ecosystem stress, making the forest more vulnerable to fire and disease and reducing its ability to recover, even where it is not directly cleared.
Exam-style practice questions
Practice questions written in the style of Pearson Edexcel exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
Edexcel B 20194 marksExplain two causes of deforestation in the tropical rainforest. (Paper 3, Section B)Show worked answer →
A 4-mark "Explain" question on Paper 3 (Forests under threat), assessing AO1 and AO2. Markers reward two causes each developed with how it leads to forest loss.
Award credit for: commercial agriculture, where large areas are cleared to grow cash crops (soy, palm oil) or to graze cattle for beef, which drives much of the loss. Commercial logging for valuable hardwoods (mahogany) removes trees and opens roads that allow further clearance. Either could be replaced by mineral extraction (mining), subsistence farming, fuel-wood collection, biofuels or hydroelectric (HEP) dams that flood forest. The strongest answers name the cause and explain the chain to forest loss, rather than just listing it.
Edexcel B 20228 marksAssess the extent to which the tropical rainforest faces greater threats than the taiga. (Paper 3, Section B)Show worked answer →
An 8-mark extended-writing question assessing AO1, AO2 and AO3 (judgement), with a levelled mark scheme. "Assess the extent" needs a balanced, supported judgement comparing the two biomes.
Strong answers compare the threats. Rainforest: rapid direct deforestation for agriculture, logging, mining, HEP and fuel wood, plus the indirect threat of climate change (drought and ecosystem stress), and because biodiversity is so high, loss is severe and often irreversible. Taiga: slower but growing direct threats from softwood logging, pulp and paper, and the exploitation of minerals, fossil fuels and HEP, plus indirect threats from acid precipitation, forest fires, and pests and diseases; because the taiga regrows slowly and stores vast carbon, damage is long-lasting. Reach a judgement: the rainforest faces faster, more visible loss and greater biodiversity damage, but the taiga's slow recovery and huge carbon store make its threats serious too, so the answer depends on how you weigh speed against recovery. Markers reward both biomes, both direct and indirect threats, and a clear conclusion.
Related dot points
- The structure, functioning and adaptations of the tropical rainforest and the taiga: how biotic and abiotic components are interdependent, how plants and animals are adapted, and the contrasting rates of nutrient cycling, productivity and biodiversity.
A focused answer to Edexcel GCSE Geography B Topic 8 (Forests under threat) on the tropical rainforest and taiga, covering their structure and functioning, how biotic and abiotic components are interdependent, plant and animal adaptations, and the contrasting rates of nutrient cycling, productivity and biodiversity.
- Global actions to protect tropical rainforests (CITES, REDD), the challenge of sustainable forest management and alternative livelihoods, and the challenges and conflicts of protecting the taiga wilderness.
A focused answer to Edexcel GCSE Geography B Topic 8 (Forests under threat) on conservation and sustainable management, covering global actions to protect tropical rainforests (CITES, REDD), the challenge of sustainable management and alternative livelihoods, and the conflicts over protecting the taiga wilderness.
- The global distribution and characteristics of major biomes and how they are controlled by climate; how local factors alter biome distribution; and how the biotic and abiotic components of biomes interact.
A focused answer to Edexcel GCSE Geography B Topic 7 (People and the biosphere) on global biomes, covering the distribution and characteristics of major biomes, how climate controls them, how local factors alter their distribution, and how the biotic and abiotic components of biomes interact.
- How the global demand for oil is rising while supplies are unevenly available; how oil supply and prices are affected by international relations and the economy; and the costs and benefits of exploiting new conventional and unconventional sources.
A focused answer to Edexcel GCSE Geography B Topic 9 (Consuming energy resources) on rising oil demand and uneven supply, how international relations and the economy affect oil prices, and the costs and benefits of exploiting new conventional and unconventional sources such as tar sands and shale gas.
Sources & how we know this
- Pearson Edexcel GCSE (9-1) Geography B (1GB0) specification — Pearson Edexcel (2016)