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Invasive fish disrupt host-pathogen dynamics leading to amphibian declines

2022-12Contribution to journal Open access
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datacite.subject.fosCiências Médicas
datacite.subject.sdg03:Saúde de Qualidade
dc.contributor.authorRosa, Gonçalo M.
dc.contributor.authorBotto, Gonçalo Ayala
dc.contributor.authorMitra, Amartya T.
dc.contributor.authorAlmeida, João Simões de
dc.contributor.authorHofmann, Max
dc.contributor.authorLeung, William T.M.
dc.contributor.authorMatos, António Pedro Alves de
dc.contributor.authorCaeiro, Maria Filomena
dc.contributor.authorFroufe, Elsa
dc.contributor.authorLoureiro, Armando
dc.contributor.authorPrice, Stephen J.
dc.contributor.authorOwen, Christopher
dc.contributor.authorRebelo, Rui
dc.contributor.authorSoares, Claúdia
dc.date.accessioned2025-11-17T14:29:03Z
dc.date.available2025-11-17T14:29:03Z
dc.date.issued2022-12
dc.description.abstractSudden disease outbreaks may not necessarily reflect a recent pathogen introduction but may instead arise from the disruption of a host-pathogen equilibrium. Together with invasive species, emerging pathogens pose significant threats to biodiversity. The dynamics of each stressor have been studied separately, yet rarely when interacting. Using a 40-year dataset, we tested the hypothesis that the introduction of an invasive fish leads to such a disruption, manifested by ranavirosis outbreaks on amphibian hosts. MCP sequencing revealed the historical presence of two major Ranavirus clades, with low prevalence. The introduction of fish was not followed by the emergence of new viruses, but rather by an increase in the prevalence of the strains already present, fitting the ‘endemic pathogen hypothesis’. Two decades after the first die-offs, one amphibian species persists in extremely low numbers, but Ranavirus prevalence is closer to the enzootic phase that preceded the outbreaks. Models show that host population collapse and lack of recovery are best explained by the concerted interaction of Ranavirus and invasive fish. We provide robust evidence that invasive species can impact naïve communities by disrupting the host-pathogen balance, exacerbating health threats. This study emphasizes the importance of exploring the historical interactions between multiple stressors to understand population declines.eng
dc.identifier.citationGonçalo M. Rosa, Gonçalo Ayala Botto, Amartya T. Mitra, João Simões de Almeida, Max Hofmann, William T.M. Leung, António Pedro Alves de Matos, Maria Filomena Caeiro, Elsa Froufe, Armando Loureiro, Stephen J. Price, Christopher Owen, Rui Rebelo, Claudia Soares, Invasive fish disrupt host-pathogen dynamics leading to amphibian declines, Biological Conservation, 2022, 276:109785. https://doi.org/10.1016/j.biocon.2022.109785.
dc.identifier.doi10.1016/j.biocon.2022.109785
dc.identifier.issn0006-3207
dc.identifier.urihttp://hdl.handle.net/10400.26/59819
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relation.hasversionhttps://doi.org/10.1016/j.biocon.2022.109785
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectRanavirus
dc.subjectEmerging infectious diseases
dc.subjectHost-pathogen ecology
dc.subjectPathogen emergence drivers
dc.subjectInvasive species
dc.subjectHost-pathogen equilibrium
dc.titleInvasive fish disrupt host-pathogen dynamics leading to amphibian declineseng
dc.typecontribution to journal
dspace.entity.typePublication
oaire.citation.startPage109785
oaire.citation.titleBiological Conservation
oaire.citation.volume276
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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