How to use the biomagnification up the food chain calculator
Estimate how a pollutant concentration grows at each trophic level of a food chain. Enter concentration in water, biomagnification factor per level, trophic levels above water in the fields above; the concentration at top level are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “biomagnification”, “bioaccumulation food chain”, “mercury in fish concentration”, “calculate biomagnification up the food chain”, “find concentration at top level”.
Formula
Variables
- Cw — Concentration in water (µg/L)
- BMF — Biomagnification factor per level
- n — Trophic levels above water
Worked example
With concentration in water = 0.001 µg/L, biomagnification factor per level = 5, trophic levels above water = 4, the calculator gives concentration at top level ≈ 0.625 µg/kg; concentration at top level ≈ 0.000625 mg/kg.
Frequently asked questions
What is the biomagnification up the food chain calculator used for?
Estimate how a pollutant concentration grows at each trophic level of a food chain. It helps with questions such as “biomagnification”, “bioaccumulation food chain”, “mercury in fish concentration”.
What is the formula for the biomagnification up the food chain calculation?
Concentration at top level (µg/kg) = Cw × BMF^n. Concentration at top level (mg/kg) = [Concentration at top level] / 1000. Here Cw is concentration in water (µg/L), BMF is biomagnification factor per level, n is trophic levels above water.
What inputs do I need for the biomagnification up the food chain calculator?
You need concentration in water in µg/L, biomagnification factor per level, trophic levels above water. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the biomagnification up the food chain calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the biomagnification up the food chain result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.