metrics for quantifying the contributions of different threats to red lists

Version 1.1 allows threat scores to be calculated in two ways: from severities alone (i.e ignoring scopes, as in version 1.0) or based on the products of scopes and severities.

metrics for quantifying the contributions of different threats to red lists

Purpose:
Improved quantification and reporting of threats affecting red-listed species or ecosystems, using the Red List Index or the Expected Loss of Species. Data from one or more Red Lists are needed as input.

Related resources
:
The code described here

• is used and explained in an article in Conservation Biology by Sandvik & Pedersen (2023, https://doi.org/10.1111/cobi.14105);
• uses data available from Zenodo at https://doi.org/10.5281/zenodo.7893216.

Contents
:
The repository contains the R code to reproduce the findings of Sandvik & Pedersen (2023) as well as generic functions that can be used to analyse threats in other Red Lists:

The functions used are defined in function.R.
The specific analyses of the Norwegian Red Lists of species are shown in species.md (with the underlying R Markdown file available in species.Rmd).
The specific analyses of the Norwegian Red List of ecosystems are shown in ecosyst.md (with the underlying R Markdown file available in ecosyst.Rmd).

Preliminary code

This is the first release of this repository. Some issues remain to the sorted out, but most functions should be working.