Extinction assessment tools
Extinction of a taxon is often difficult to confirm, yet there are costs associated with the wrong listing (listing an extant taxon as EX, or failing to list an extinct taxon as EX) as well as benefits to making the correct listing. The files below are designed to help assessors calculate the probability that a taxon is now extinct, P(E), and to compare this probability to thresholds that were determined based on a cost-benefit framework.
The files are available to download separately below, or click here to download all three files together.
- Instructions document: EX_instructions.pdf.
- Extinction probability data template: EX_data.xlsx.
- R script for the records and surveys model: RecordsSurveysModel.R.