IB Biology SL A4.2.7 Conservation Approaches Questions

Practise IB Biology SL A4.2.7 by comparing natural-habitat protection with ex situ methods, active management, corridors and biological-control safeguards.

Exam points

Distinguish in situ conservation in natural habitats from ex situ conservation outside them, using reserve, zoo and captive-breeding contexts.
Explain how protected areas and active management conserve populations by controlling threats, maintaining habitat resources and supporting reintroduction.
Explain ex situ conservation actions—zoos or aquariums, captive breeding, botanical gardens and seed banks—and how they support endangered species.
Evaluate biological control as a conservation action by identifying a target and control organism and weighing specificity, food-web risk and spread.
Explain how wildlife corridors connect fragmented reserves and preserve movement, resources and genetic diversity.

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Study A4.2.7—Conservation approaches conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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The tundra ecosystem in Finnish Lapland has a short growing season and a mean temperature of $-2.0^{\circ} \mathrm{C}$ . It is also naturally grazed by herbivores such as reindeer (Rangifer tarandus). Different quadrats were set up to include and exclude the reindeer in both normal and warmed temperatures. Open-topped warming chambers were used to heat both the soil and air in the warmed quadrats. The graph shows the changes in plant richness over five years.

Figure for Question IB Biology SL A4.2.7 Conservation Approaches Questions question 1 — IB Biology SL

Suggest how the results of this experiment can be used in the planning of in situ conservation programmes for tundra plant species.

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IB Biology SL A4.2.7 Conservation Approaches Questions question 1