Rarefaction Calculator
The Rarefaction Calculator computes expected species richness E(S_n) using the standard individual-based rarefaction formula from ecology. It standardizes richness for different sample sizes, enabling fair comparisons based on peer-reviewed methods (Hurlbert 1971, Heck et al. 1975).
About the Tool
Input species abundances to calculate rarefied richness and view curve points. Ideal for biodiversity assessment in agriculture, ecology, and microbiology.
Importance of Rarefaction
Corrects for sampling effort bias in richness estimates. Essential for comparing diversity in unevenly sampled agricultural systems, soils, or ecosystems—promoting sustainable management.
User Guidelines
- Enter comma-separated abundances (e.g., 450,120,80,30) or name:count format.
- Specify target n or view full curve table.
- Results show E(S_n), observed S, and interpretation.
- Use accurate counts from field/sequencing data.
When and Why to Use It
Use for standardized richness comparisons, sampling sufficiency checks, or research in farming and ecology. Why? Provides unbiased, scientifically valid estimates.
Purpose
To democratize rarefaction analysis for better biodiversity insights in sustainable agriculture. Featured by Agri Care Hub. Details at Rarefaction Calculator on Wikipedia.
Rarefaction helps reveal hidden diversity and sampling completeness—key for resilient agroecosystems amid environmental pressures.