Region A receives an average annual rainfall of $1200$ mm and has a mean temperature of $22^{\circ}$C. Region B receives $800$ mm of rainfall and has a mean temperature of $27^{\circ}$C. The tropical rainforest requires more than $2000$ mm rainfall, the tropical savanna requires between $800$ and $1500$ mm rainfall and a temperature above $20^{\circ}$C, and desert vegetation requires less than $250$ mm rainfall. Using the biodiversity index $I = \frac{R}{100}\times\bigl(30-|T-25|\bigr)$ where $R$ is rainfall (mm) and $T$ is temperature (°C), identify the most likely vegetation type for each region and state which region has the higher biodiversity index.

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Both regions are tropical savanna; Region A has the higher biodiversity index (324 versus 224).

Gce Model Questions Vol1 2023 Geography Question 46

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