The living world · GCSE Geography
Biodiversity hotspots
GCSE Geography biodiversity hotspots: Madagascar, Borneo and the Coral Triangle — endemic species, habitat loss, ecotourism, conservation NGOs and why hotspots are priorities.
A hotspot is irreplaceable and on fire — many species found nowhere else, much habitat already gone.
The important bits
What you need to know
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Biodiversity is the variety of life at genetic, species and ecosystem levels. It matters for food webs, medicines, resilience, and intrinsic value.
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Hotspots (Conservation International definition): ≥1,500 endemic vascular plant species AND ≥70% habitat loss. They cover a small land area but hold a large share of Earth’s species — efficient targets for conservation spending.
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Madagascar: separated from Africa 88 million years ago — lemurs, baobabs, chameleons found nowhere else. Slash-and-burn (tavy) farming, logging, mining threaten forest fragments.
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Borneo (Indonesia/Malaysia/Brunei): ancient rainforest, orangutans, pygmy elephants; palm oil plantations replace forest; peat fires cause haze and carbon spikes.
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Coral Triangle (Indonesia, Philippines, PNG): highest marine species richness; reefs and fisheries; blast fishing and climate bleaching.
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Causes of biodiversity loss globally: habitat destruction, invasive species, overexploitation, pollution, climate change (HIPPO mnemonic on some specs).
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Conservation: protected areas, corridors, seed banks (Kew Millennium Seed Bank), CITES on trade, ecotourism (Madagascar lemur tourism), community forests, debt-for-nature.
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Evaluation: hotspots focus limited money well, but edge species outside hotspots matter; enforcement weak where poverty drives clearance; ecotourism can disturb wildlife if unmanaged.
Quotations worth analysing
Short evidence. Real method.
“Madagascar is a evolutionary warehouse — 90% of wildlife is found nowhere else.”
Use endemism in definitions. “Lots of animals” is weaker than “found nowhere else”.
“Palm oil is a lipstick ingredient and a rainforest bulldozer — follow the supply chain.”
Name crop, name forest loss, name orangutan habitat — cause to effect in one chain.
Go deeper
Why hotspot criteria use plants and loss
Plants are sessile, diverse, and data-rich; 70% habitat lost signals urgency. Madagascar and Borneo qualify on both counts. The logic for exams: protect where unique species cluster and time is short. Critique: animals-only charities may ignore fungi and invertebrates; political borders split ecosystems (Borneo tri-national). Strong answers define hotspot, name one, cite endemism and threat, then one conservation tool.
Go deeper
Ecotourism as double-edged conservation
Madagascar’s lemur tourism funds parks and local guides but can habituate animals to humans and spread disease. Borneo’s orangutan sanctuaries educate visitors yet palm oil estates remain outside park boundaries. Marine hotspots need no-touch diving and mooring buoys. Judgement: tourism works when carrying capacity, revenue sharing, and law enforcement align — otherwise it is wildlife theatre with a gift shop.
See the idea in action
Question: why are biodiversity hotspots important and how can they be protected? Importance: high endemism (Madagascar lemurs), much habitat already lost, small area = efficient conservation. Threat: tavy farming and logging. Protection: expand reserves, support sustainable farming, ecotourism revenue, CITES on illegal wildlife trade. Limitation: poverty pushes clearance unless alternatives pay. Judgement: hotspots prioritise scarce conservation funds but need local livelihood solutions.
Exam technique
Turn knowledge into marks
Define hotspot with both criteria (endemic plants + habitat lost). Learn Madagascar OR Borneo with species names — lemur, orangutan, baobab.
Common mistakes
Do not give these marks away
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Calling any national park a hotspot without endemism and loss criteria.
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Ignoring marine hotspots (Coral Triangle).
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Conservation praise with no threat named.
What defines a biodiversity hotspot?
AAny country with a zoo
BMany endemic plant species and at least about 70% habitat loss
COnly polar regions with penguins
DCities with more than one park
Show the answer
Many endemic plant species and at least about 70% habitat loss. Hotspots concentrate unique species under severe threat — conservation priority areas, not just pretty landscapes.
Quick questions
If this is the bit you searched
Why is Madagascar a hotspot?
Long isolation created huge endemism (lemurs, unique plants); most original forest is gone, threatening species nowhere else.
How does palm oil affect Borneo?
Plantations clear rainforest and peat, destroying orangutan habitat and causing fires and carbon release.
What is the Coral Triangle?
A marine region around Indonesia and neighbours with the world’s richest reef and fish diversity — a marine biodiversity hotspot.