Question

Which of the following is a limiting factor for productivity in terrestrial ecosystems?

Options

• Overabundance of CO₂

• Excessive sunlight

• Water availability

• Excessive temperature

Answer 1

Water availability is identified as a limiting factor in terrestrial ecosystems. Scarcity of water drastically reduces Gross Primary Productivity because water is essential for photosynthesis, nutrient transport, and maintaining turgor pressure in plant cells, making it critical for plant function.