Sewell, Thomas R;
Van Dorp, Lucy;
Ghosh, Pria N;
Wierzbicki, Claudia;
Caroe, Christian;
Lyakurwa, John V;
Tonelli, Elena;
... Fisher, Matthew C; + view all
(2024)
Archival mitogenomes identify invasion by the Batrachochytrium dendrobatidis
CAPE lineage caused an African amphibian extinction in the wild.
Proceedings of the Royal Society B: Biological Sciences
10.1098/rspb.2024.1157.
(In press).
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Abstract
Outbreaks of emerging infectious diseases are influenced by local biotic and abiotic factors, with host declines occurring when conditions favour the pathogen. Deterioration in the population of the microendemic Tanzanian Kihansi spray toad (Nectophrynoides asperginis) occurred after the construction of a hydropower dam, implicating habitat modification in this species decline. Population recovery followed habitat augmentation, however, a subsequent outbreak of chytridiomycosis caused by Batrachochytrium dendrobatidis (Bd) led to the spray toads extinction in the wild. We show using spatiotemporal surveillance and mitogenome assembly of Bd from archived toad mortalities that the outbreak was caused by invasion of the BdCAPE lineage and not the panzootic lineage BdGPL. Molecular dating reveals an emergence of BdCAPE across southern Africa overlapping with the timing of the spray toads extinction. That our post-outbreak surveillance of co-occurring amphibian species in the Udzungwa Mountains shows widespread infection by BdCAPE yet no signs of ill-health or decline suggests these other species can tolerate Bd when environments are stable. We conclude that, despite transient success in mitigating the impact caused by dams’ construction, invasion by BdCAPE caused the ultimate die-off that led to the extinction of the Kihansi spray toad.
| Type: | Article |
|---|---|
| Title: | Archival mitogenomes identify invasion by the Batrachochytrium dendrobatidis CAPE lineage caused an African amphibian extinction in the wild |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1098/rspb.2024.1157 |
| Publisher version: | https://doi.org/10.1098/rspb.2024.1157 |
| Language: | English |
| Additional information: | Copyright © 2024 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
| Keywords: | Amphibian, extinction, habitat change, anthropogenic, chytridiomycosis, emerging infectious disease, bdcape, Batrachochytrium dendrobatidis |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Genetics, Evolution and Environment |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10194654 |
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