Managing Biodiversity (Cambridge (CIE) IGCSE Environmental Management): Flashcards
Exam code: 0680
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Define genetic resources.
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Cards in this collection (21)
Define genetic resources.
Genetic resources are the variety of genes within and between species.
Define sustainable harvesting.
Sustainable harvesting means taking only a small amount of a wild species, so the population can reproduce fast enough to replace what people remove.
Harvesting quotas or size limits let individuals stay in the ecosystem and continue the life cycle.
Harvesting quotas or size limits let young individuals stay in the ecosystem and continue the life cycle.
Why do sustainable foresters leave seed trees standing?
Sustainable foresters leave seed trees standing to allow natural reseeding of the forest.
True or False?
Selective logging removes every tree in the logged area.
False.
Selective logging removes only certain trees, which minimises canopy loss and disturbance to forest structure.
Why do national parks control visitor access?
National parks control visitor access to shield sensitive areas from damage by heavy disturbance.
Define wildlife corridor.
A wildlife corridor is a link that connects separate habitats, so animals can move between them.
How do wildlife corridors keep populations genetically healthy?
Wildlife corridors let individuals from different groups mix, which reduces the risk of inbreeding.
Define seed bank.
A seed bank is a store that keeps seeds in cold, dry conditions, so they stay viable for many years as a backup for rare plants.
How do studbooks support captive breeding in zoos?
Zoos use studbooks to match breeding pairs carefully, which protects genetic diversity.
CITES is the Convention on International Trade in Species.
CITES is the Convention on International Trade in Endangered Species.
Why does legal wildlife trade require permits?
Permits let authorities monitor species numbers, which keeps harvesting sustainable.
True or False?
Once scientists classify a species by threat level, the list never needs updating.
False.
Scientists update threat lists regularly to track changes in population size, which shows whether conservation strategies are working.
How does ecotourism give local communities a reason to protect wildlife?
Ecotourism brings money directly to local communities, so they gain more from protecting wildlife than from destroying habitats.
Why can poaching still happen in protected areas?
Protected areas are costly to manage, so without enough staff or money, illegal activities such as poaching may continue.
True or False?
Captive breeding always prepares animals fully for life in the wild.
False.
Some captive-bred animals struggle to hunt, hide or find territory after release.
Why can seed banks not store every plant type?
Some plants have delicate seeds that do not survive freezing or drying.
International agreements depend on countries enforcing the rules, so enforcement can reduce their impact.
International agreements depend on countries enforcing the rules, so weak enforcement can reduce their impact.
Why are wildlife corridors hard to build in crowded landscapes?
In crowded landscapes, roads, farms or towns block the natural pathways that corridors need.
True or False?
Ecotourism always provides a steady, year-round income for conservation.
False.
Ecotourism revenue is seasonal and can collapse during political instability or global crises such as pandemics.
How does conserving genetic resources improve future food security?
Conserved genetic resources let scientists develop new crops that resist drought, pests or diseases.
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