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WAEarth and Environmental ScienceQuick questions
Unit 3: Managing Earth resources
Quick questions on Sustainable management, monitoring and modelling: WACE Year 12 Earth and Environmental Science
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is maximum sustainable yield?Show answer
Maximum sustainable yield is the largest amount that can be taken repeatedly while the resource still replenishes itself. Harvesting above it causes decline; harvesting below it leaves the resource underused. Because populations grow fastest at intermediate sizes, the sustainable yield is usually highest when a stock is kept at a moderate level rather than near its maximum.
What is monitoring?Show answer
Monitoring measures the condition of a resource over time so managers can detect change early.
What is modelling?Show answer
Modelling uses data to predict how a resource will respond to different decisions. A model might forecast how an aquifer level will change under several pumping rates, or how a fish stock will respond to different catch limits. Models let managers test scenarios before acting and explore trade-offs between use now and availability later. All models simplify reality, so their predictions carry uncertainty and improve as more monitoring data refine them.
What are managing at different scales?Show answer
Resources are managed across local, regional and global scales.
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