Properties of biodiversity indices that incorporate future extinction risk

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ID: 330023
2026
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Abstract
Abstract The loss of biodiversity due to the likely widespread extinction of species in the near future is a focus of current concern in conservation biology. One approach to measure the impact of this extinction is based on the predicted loss of phylogenetic diversity. These predictions have become a focus of the Zoological Society of London’s ‘EDGE2’ program for quantifying biodiversity loss and involves considering the HED (heightened evolutionary distinctiveness) and HEDGE (heightened evolutionary distinctiveness and globally endangered) indices which are based on phylogenetic diversity on a tree. Here, we show how to generalise the HED(GE) indices by expanding their application to more general settings (to phylogenetic networks, to feature diversity on discrete traits, and to arbitrary biodiversity measures). We provide a simple and explicit description of the mean and, importantly, the variance of such measures, and illustrate our results by an application to the phylogeny and a small set of features for all 27 extant Crocodilians.
Reference Key
openalex_W7130534178 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Mike Steel, Kristina Wicke, Arne Mooers
Journal systematic biology
Year 2026
DOI
10.1093/sysbio/syag075
URL
https://doi.org/10.1093/sysbio/syag075
Keywords Keywords not found

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