IB ESS HL 3.3 Conservation and Regeneration Question Bank
Practise IB ESS HL 3.3 by analysing protected-area design, stakeholder trade-offs and evidence for species and habitat regeneration.
- Syllabus
- First assessment 2026
- Course
- ESS HL
- Level
- HL
Practise IB ESS HL 3.3 by analysing protected-area design, stakeholder trade-offs and evidence for species and habitat regeneration.

Figure:Condor cape and Chumash traditional dance

Figure:Tourists watching condors on the Californian coast
Tejon Ranch is a 1000 km^2 home for California condors and an important biodiversity hotspot.
In 2008 the company agreed with environmental NGOs to preserve 90% of the property, including condor feeding grounds, while development could occur on the remaining 10%.
- Figure: Fact file on the California condor: California condors are scavengers and eat large amounts of carrion.
- They are among the world's rarest birds; 2012 counts estimated 405 total, including 226 wild and 179 captive.
- They are critically endangered and may travel up to 250 km in search of carrion.
- They mature and reproduce slowly, breeding at 6-8 years old and laying only one egg every two years.
- They are significant to many Californian Native American groups and traditional myths.
- Figure: Chumash cultural relationship with condors: Chumash people historically lived in central and southern coastal California; their descendants still live there.
- Old cave paintings show people wearing condor feathers for ceremonies and dances.
- Condors were once sacrificed during rituals; a legend says if the condor becomes extinct, so too will the Chumash.
Identify two arguments for the conservation of California condors.
intrinsic value of the species/biorights;
cultural value to Chumash and other Indians; future generations should have the right to see them;
a lot of money has been put into saving them so far, shame to waste it; role in ecosystem as clearing up carcasses; economic argument to attract ecotourists; one of the rarest species in the world, if we do not act now they will become extinct;
inspiring story - shows it can be done;

Table for roles in the conservation of California condors

Figure:Northwest Condor Watch Facebook page
Northwest Condor Watch is a communication space that links communities caring about returning condors to their northern home range.
Tejon Ranch is a 1000 km^2 home for California condors and an important biodiversity hotspot.
In 2008 the company agreed with environmental NGOs to preserve 90% of the property, including condor feeding grounds, while development could occur on the remaining 10%.
- Figure: Ridley-Tree Condor Preservation Act: the Ridley-Tree Condor Preservation Act made it illegal in 2008 to use lead bullets for hunting deer, bear and elk in designated California condor range.
- The act applies only in California; neighbouring states still allow lead bullets for game hunting.
- Organisations such as the National Rifle Association oppose the lead bullet ban.
- Figure: California condor captive breeding programme: removing eggs can make the mother lay another, increasing the total number of eggs, but some chicks then need hand rearing.
- Chicks are fed with condor-like glove puppets to prevent attachment to humans.
- Captive-bred condors have been trained to avoid power lines and people, reducing deaths due to power lines.
- The programme costs about US$5 million per year, roughly US$13,000 per bird.
- The aim is three populations: wild California, wild Arizona and captive, each with 150 birds and at least 15 breeding pairs.
With reference to the resource booklet, complete the table by identifying one way in which each of the following are playing a role in the conservation of California condors.
Accept other reasonable responses.

Figure:Condor chick hand-reared using a condor puppet

Figure:Condor breeding centre and release sites

Figure:Change in California condor population over time

Figure:Lead and non-lead bullets after impact
Tejon Ranch is a 1000 km^2 home for California condors and an important biodiversity hotspot.
In 2008 the company agreed with environmental NGOs to preserve 90% of the property, including condor feeding grounds, while development could occur on the remaining 10%.
- Figure: California condor captive breeding programme: removing eggs can make the mother lay another, increasing the total number of eggs, but some chicks then need hand rearing.
- Chicks are fed with condor-like glove puppets to prevent attachment to humans.
- Captive-bred condors have been trained to avoid power lines and people, reducing deaths due to power lines.
- The programme costs about US$5 million per year, roughly US$13,000 per bird.
- The aim is three populations: wild California, wild Arizona and captive, each with 150 birds and at least 15 breeding pairs.
- Figure: Ridley-Tree Condor Preservation Act: the Ridley-Tree Condor Preservation Act made it illegal in 2008 to use lead bullets for hunting deer, bear and elk in designated California condor range.
- The act applies only in California; neighbouring states still allow lead bullets for game hunting.
- Organisations such as the National Rifle Association oppose the lead bullet ban.
Using evidence from the resource booklet evaluate the success of the conservation programme for California condors.
If only strengths or weaknesses of the programme are addressed award [3 max].
population has increased from X to Y ;
needs of condors appear to now be factored into decision making;
legislation passed to ban lead bullets;
captive breeding programme is teaching young condors to avoid power lines and turbines;
However...
condors still dying from lead poisoning; population growth and development mean habitat is still at risk; some farmers still shoot them;
legislation only in one state;
protected areas and biodiversity
- Over 25% of land is protected forest and reserves with over 190 protected sites.
- Ecosystems range from coral reefs and mangroves to tropical rainforests and provide goods and environmental services.

Figure:Development of protected areas in Costa Rica
| Total number of species | more than 500000 |
|---|---|
| Flowering plants | 9000 |
| Ferns | 800 |
| Mammals | 250 |
| Birds | 850 |
| Reptiles | 220 |
| Amphibians | 200 |
| Insects | more than 300000<br>(including more than 1200 butterflies and 8000 moths) |
Table:Estimated number of species in Costa Rica
Explain three ways in which the development of protected areas shown in Figure: Development of protected areas in Costa Rica has improved the conservation of species.
protected areas may prohibit human activities which damage the habitat/threaten species (eg urban development/hunting) / protected areas provide a safe place/habitat for species to live; increase in size/number/coverage of protected areas may lead to:
more habitats protected/covered/more species are conserved; better support for higher trophic levels/top carnivores; increased distance from human activities/impacts / reduced edge effects; more genetic mixing/formation of corridors / increased chance of connecting corridors between the protected areas; (more people living close to protected areas leading to) greater engagement in conservation efforts / more local communities being involved in conservation / greater community involvement through education/raising awareness/greater familiarity; more opportunity for ecotourism which encourages continued/further conservation/financial investment into conservation; more financial support for conservation;
Note: Do not credit 'increasing habitat size for species could reduce limiting factors'.

Figure Removing invasive species to conserve water

Figure Tree removal as part of invasive-species management
Suggest why the strategy shown in Figuremay be controversial.
a. invasive species provide timber/employment within plantations;
b. invasive species provide recreational areas/aesthetic value;
c. removal reduces biodiversity/habitat diversity/ removes habitat / invasive species may provide a food source for other species;
d. removal reduces carbon sink / cutting down trees releases carbon to the atmosphere;
e. removal could lead to soil erosion;
f. invasive species have intrinsic value/biorights / goes against ecocentric beliefs / controversial from an ethical standpoint as it prioritizes one life over another;
g. it may be expensive to remove invasive species;
h. removal of invasive species may accidently remove native species;
Note: Do not accept only 'causes deforestation / removing invasive species endangers them'.
Marking guidance:
Do not accept 'use of herbicides/chemicals / damages environment/ecosystem'.

Figure King protea, an example of a fynbos plant
Figure Commercial and flagship fynbos examples
King protea is the national flower of South Africa, a flagship species, and is widely grown commercially for export as a cut flower. Rooibos is used to make tea.
Outline the role of the king protea as a flagship species.
a. protea is a popular/well known/attractive species/national flower of South Africa;
b. ... this can be used to promote/encourage conservation efforts / used to raise awareness about conservation through education;
c. useful in promoting fundraising for protea conservation/conserving other species;
d. by protecting it the entire biome/habitat/ecosystem/other species are protected;