Ecology

Ecology calculators for population growth, species diversity, mark-recapture, habitat suitability, and carbon flux.

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Calculate Net Ecosystem Exchange (NEE) from gross primary production and ecosystem respiration. Determine if an ecosystem is a carbon sink or source.

Calculate a Habitat Suitability Index (HSI) from food, water, cover, and disturbance scores using the geometric mean method.

Estimate animal home range area using a simplified Minimum Convex Polygon (MCP) method from maximum observed distance.

Project invasive species population growth and spatial spread over time. Estimate area occupied and time to full invasion.

Predict species richness from island area and distance using the species-area relationship (S = cA^z) from MacArthur & Wilson's theory.

Estimate wild population size using the Lincoln-Petersen mark-recapture method with Chapman correction and confidence intervals.

Model logistic and exponential population growth over time using initial population, growth rate, and carrying capacity.

Calculate Shannon-Wiener (H'), Simpson's Diversity Index, and evenness from species abundance data for up to 10 species.

Calculate energy transfer through trophic levels. See how energy diminishes from producers to top consumers based on ecological efficiency.

Calculate a composite Water Quality Index (0-100) from dissolved oxygen, pH, BOD, nitrate, phosphate, turbidity, and temperature change.