Ecology & populations Calculators
Estimate population size and density, quantify biodiversity, energy transfer and population change.
Lincoln index
Estimate population size from capture–mark–release–recapture data using the Lincoln index.
Open calculatorSimpson reciprocal index
Calculate the Simpson reciprocal diversity index from species abundance counts.
Open calculatorQuadrat population estimate
Calculate mean quadrat count, density and a simple habitat population estimate from random quadrat samples.
Open calculatorEnergy transfer efficiency
Calculate ecological energy-transfer efficiency between trophic levels or biological processes.
Open calculatorPopulation growth
Calculate absolute change, average growth rate and percentage population change over a time interval.
Open calculator