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The extinction of the sexier? A global investigation of the role of sexual selection in modern amphibian declines

School of Biological Sciences | PHD
Funding
Unfunded
Reference Number
SBIO-2020-1144
Application Deadline
None specified
Start Date
None specified

Overview

Multiple factors are believed to be responsible for the accelerating extinctions of biodiversity during the Anthropocene. Environmental degradation is widely recognised as the leading factor. However, emerging hypotheses predict that ‘costly’ species traits – sexually-selected displays in particular – can play a key role in predisposing species to declines. This project investigates the link between extinction risk and sexual selection in amphibians globally.

Biodiversity is undergoing alarming declines worldwide. Modern species extinctions are predominantly attributed to environmental factors, mostly climate change and habitat destruction. However, sexual selection –competition over mates – drives evolution of intrinsically ‘costly’ traits (calls, ornaments, displays) that increase chances of population collapses, thus potentially leading to non-ecological extinctions. But, is sexual selection a factor responsible for ongoing species extinctions? Despite its enormous implications for our understanding of current and future global biodiversity, this question remains unresolved. Existing theories linking sexual selection to extinctions make contradictory predictions – some models suggest that sexual selection accelerates extinctions, while others suggest that it mitigates species declines. However, empirical evidence remains limited.

This project implements the first global-scale research programme investigating whether the worldwide extinctions of one of nature’s most threatened lineages, amphibians, are accelerated by the widespread evolution of a particularly costly sexual trait – advertisement calls, known to enhance mortality via energetic and ecological costs. Using a dataset spanning morphological, ecological, life history, genomic, climatic, geographic and phylogenetic data for 7,000+ amphibian species, this project aims to establish the mechanistic connections between sexual selection and extinctions at an unprecedented scale. This project is part of the Global Amphibian Biodiversity Project (GABiP) led by Daniel Pincheira-Donoso.

Project Summary
Supervisor

Dr Daniel Pincheira-Donoso

More Information

askmhls@qub.ac.uk

Research Profile


Mode of Study

Full-time: 3 years


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