Question

In which standard units is productivity measured in terms of mass?

Options

• g m⁻² yr⁻¹ or kg m⁻² yr⁻¹

• kg yr⁻¹

• kcal m⁻³ day⁻¹

• g m⁻¹ hr⁻¹

Answer 1

Productivity is measured using standardized units that express mass per unit area per unit time. The common units are g m⁻² yr⁻¹ (grams per square meter per year) or kg m⁻² yr⁻¹ (kilograms per square meter per year), allowing for consistent comparisons across different ecosystems.