3.3 Conservation and regeneration
- Syllabus
- First assessment 2026
- Topic
- 3.3
- Level
- SL
A conservation argument can be aesthetic, ecological, economic, ethical or social; identify the value before judging its strength.
Aesthetic values beauty; ecological values functions; economic values income or future resources; ethical values intrinsic worth or responsibility; social values health, identity and culture. One example can support several lenses, but the reasoning differs.
A wetland may attract visitors (economic), reduce floods (ecological) and hold cultural meaning (social); do not count these as the same reason.
Ethical/intrinsic value; tourism income would be economic, not the same claim.
Different values are not interchangeable evidence; name the value and its decision implication.
In situ protects organisms within functioning habitat; ex situ protects organisms or genetic material outside it.
In situ measures such as national parks, nature reserves and sanctuaries maintain habitats, interactions and ecological processes. Ex situ measures such as zoos, botanic gardens and seed banks protect selected organisms or genetic material outside the habitat; CITES limits international trade in threatened species.
A seed bank can preserve a crop allele while a protected landscape maintains pollinators, soil and natural selection.
In situ habitat protection; ex situ secures selected organisms or genes, not all interactions.
Ex situ is not a replacement for habitat conservation; choose based on the threat and what must be preserved.
A focal-species programme works best when direct protection is paired with the habitat and community conditions that sustain it.
Captive breeding, research and public attention can support a flagship; habitat protection and corridors preserve food, breeding and other species. A flagship is chosen for visibility, not necessarily disproportionate ecological effect.
Panda breeding is more durable when bamboo forest is reconnected and local land-use incentives reduce fragmentation.
Measured habitat condition, connectivity and outcomes for associated communities or species.
Flagship and keystone are different concepts: popularity does not prove disproportionate ecological impact.
The Convention on Biological Diversity links conservation, sustainable use and fair cooperation; its protocols solve different problems.
CBD parties develop national strategies for conserving and sustainably using biodiversity and cooperate on protected marine areas beyond national jurisdiction. The Nagoya Protocol addresses fair and equitable benefit-sharing from genetic resources; CITES separately regulates international wildlife trade.
A company using a plant genetic resource raises Nagoya benefit-sharing questions; exporting a protected animal raises CITES trade questions.
Nagoya Protocol, not CITES; match the policy to the mechanism.
International conservation names are not interchangeable—identify the regulated activity first.
Use protection when preventing disturbance is enough; use active management when a diagnosed pressure blocks recovery.
Name the limiting threat before choosing the action. Active management may remove invasive plants or restore water levels. In a fenced New Zealand ecosanctuary, introduced mammalian predators are removed and pest-exclusion fencing reduces reinvasion, allowing native populations and ecosystem processes to recover.
A reserve protects a wetland from new clearing; if invasive plants already suppress natives, removal and water restoration are also needed.
For a fenced ecosanctuary, verify predator removal, fence integrity, reinvasion risk and native-species response; surrounding land use and distance from urban pressure also affect success.
More intervention is not better; target the diagnosed bottleneck and verify the outcome.
Reserve design starts with the target’s territory, breeding, movement and connectivity needs, then adds shape, corridors and buffer zones.
Compact cores reduce edge effects; corridors restore gene flow; buffer zones reduce conflict and compatible-use pressure; transition zones can support sustainable livelihoods. Roads and farms still require management.
Glacier Bay and Admiralty Island Biosphere Reserve in Alaska protects glacier succession, mature temperate rainforest and diverse wetland and marine habitats. A protected core limits activity; buffer and transition areas support research, tourism, managed hunting or fishing and local participation, so conservation is linked to surrounding human use.
Documented movement or gene-flow need between habitat patches, not a corridor drawn without a target.
A larger reserve is not automatically better if it is disconnected, edge-dominated or socially unenforceable.
Rewilding aims to restore self-sustaining processes such as predation, grazing, succession, seed dispersal and connectivity.
It may involve reintroductions, habitat reconnection, reduced intensive use or temporary control of invasive pressures. Success is an observable process response, not a return to one imagined past snapshot.
At Hinewai, stopping intensive farming allowed succession after initial non-native control, with native vegetation and birds returning.
Process and outcome—natural regeneration, food-web interactions, habitat connectivity and target species—not only animal counts.
Rewilding is not ‘do nothing everywhere’; early intervention or ongoing safeguards may be necessary.
Biodiversity recovery needs actions at individual, community, national and international levels that address the same causal chain.
Individuals alter demand and report data; communities restore habitat; governments regulate and fund; international bodies coordinate targets, finance and cross-border evidence. Indicators should track pressure and function.
Consumer demand changes only help a forest if community stewardship, national enforcement and supply-chain cooperation also reduce clearing.
Other links in the pressure pathway may remain unchanged or shift the problem elsewhere.
More actors do not guarantee coordination; align actions, indicators and accountability.
A worldview can explain why a conservation strategy is preferred, but implementation conditions determine whether it works.
Ecocentric arguments may favour intrinsic value and low intervention; anthropocentric or technocentric arguments may favour human benefits or tools. Success still needs legitimacy, finance, education, law and monitoring.
A community may support in situ protection for cultural reasons, yet the reserve still fails without funding and enforceable rules.
A strategy can fit a society’s values yet still fail operationally; rationale and capacity are separate tests.
Do not reduce perspectives to fixed personalities; treat them as tendencies in a decision context.