Doubling time

Doubling time is the period required for a population to double in biomass at a given temperature, light, and nutrient level. Practically, doubling time determines treatment cadence — a treatment that removes 90% of biomass from a plant doubling every 10 days is back to original coverage in 33 days. Common doubling times in warm water: water hyacinth 8–12 days; duckweed 2–4 days; giant salvinia 4–10 days. Treatment intervals shorter than the doubling time hold; longer fail.