Volume 29, Issue 2 p. 309-319
RESEARCH PAPER

Decoupled erosion of amphibians’ phylogenetic and functional diversity due to extinction

Brunno F. Oliveira

Corresponding Author

Brunno F. Oliveira

Department of Biology and Environmental Science, Auburn University at Montgomery, Montgomery, Alabama

Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, Florida

Departamento de Ecologia, Universidade Federal do Rio Grande do Norte, Natal, Brazil

Correspondence

Brunno F. Oliveira, Department of Biology and Environmental Science, Auburn University at Montgomery, Montgomery, AL 36117, USA.

Email: [email protected]

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Brett R. Scheffers

Brett R. Scheffers

Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, Florida

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Gabriel C. Costa

Gabriel C. Costa

Department of Biology and Environmental Science, Auburn University at Montgomery, Montgomery, Alabama

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First published: 12 November 2019
Citations: 20

[Correction added on 05 May 2020, after first online publication: the name of the 2nd author was misspelt and has been corrected in this version.]

Abstract

Aim

It has been argued that the loss of phylogenetic diversity (PD) from species extinctions will result in concomitant loss of functional diversity (FD). As a result, species extinction undermines not only unique evolutionary history, but also ecosystem function and stability. Using data from > 6,000 amphibian species globally, we assess the potential erosion of PD and FD as a result of extinction.

Location

Global.

Time period

From the present day to the next 100 years.

Major taxa studied

Amphibians (Anura, Caudata and Gymnophiona).

Methods

We simulated future biogeographical patterns of extinction based on International Union for Conservation of Nature (IUCN) threat status, and estimated the loss of PD and FD accordingly. We used null models to determine the extent to which extinctions may result in disproportional losses of PD and FD relative to random extinction. Using spatial regressions, we tested whether the loss of PD can predict the loss of FD.

Results

Although spatial patterns of current amphibian PD and FD were similar, extinctions did not retain this similarity. The magnitude of such a decoupling varied widely in space, with most of the global assemblages losing more FD than PD.

Main conclusion

This study challenges the assumption that extinctions should yield comparable loss of PD and FD. Species may not be equivalent in the amount of unique evolutionary history and ecological functions that would be lost if they become extinct. Designing conservation strategies based on a single dimension of biodiversity has the danger of leading to misinformed outcomes.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.