In ecology, _____ is determined by dividing the biomass per unit area by the age of the forest ecosystem.

biomass productivity

The correct answer is Option (4)- biomass productivity

The correct term for the given statement is "biomass productivity."

Biomass productivity in ecology refers to the rate at which organic matter (biomass) is produced within an ecosystem over a specific period, typically measured in terms of biomass per unit area per unit time (e.g., grams per square meter per year). It is often determined by dividing the total biomass produced by the age of the forest ecosystem, providing insights into the efficiency of biomass production within the ecosystem. Higher biomass productivity indicates a greater capacity of the ecosystem to produce organic matter, which can support various trophic levels and contribute to ecosystem functioning and stability.