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Factors influencing the relative abundance of invasive predators and omnivores on islands

dc.contributor.authorLamelas-López, Lucas
dc.contributor.authorSantos, Maria J.
dc.date.accessioned2021-09-14T10:34:22Z
dc.date.available2021-09-14T10:34:22Z
dc.date.issued2021-05
dc.description.abstractInvasive alien species (IAS) are the major cause of native species extinctions on islands worldwide. To mitigate or eliminate IAS impacts, eradication is often the best alternative. However, IAS removal may result in cascading effects, through increase in prey abundance, mesopredator release, or competitor release. Our objective is to determine which ecological processes may influence the relative abundance of invasive carnivores and rodents on an insular system. We find that feral cat and mustelids relative abundance was strongly related by prey abundance, and for the feral cat, abundance was also controlled by habitat; these results suggest that bottom-up control through environmental filtering could be the mechanism explaining predator abundance. For rodents, we find that the abundance of the black rat was mostly controlled by the abundance of Norway rat and house mice, and food availability; the Norway rat by the abundance of black rat, a house mice and of mustelid predators; and house mouse by the other rodents and food availability. These results suggest that several mechanisms could be concurrently controlling abundance of these species; competition and predation for Norway rat, and competition and bottom-up control by environmental filtering for the other two rodents. While different factors explain the abundance of invasive species within the same functional group, food resource availability is, in general, the main controller of abundance of invasive rodents and carnivores in the Azores. Therefore, IAS management actions in these islands should focus on limiting the access to food resources and shelter, mainly near to human populations.en
dc.description.sponsorshipLLL (SFRH/BD/115022/2016) was supported by the Fundação para a Ciência e Tecnologia—FCT. MJS was supported by the University Research Priority Program in Global Change and Biodiversity from the University of Zürich.en
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationLamelas-López, L. & Santos, M.J. (2021). Factors influencing the relative abundance of invasive predators and omnivores on islands. "Biological Invasions", 23(9), 2819-2830. DOI:10.1007/s10530-021-02535-2en
dc.identifier.doi10.1007/s10530-021-02535-2pt_PT
dc.identifier.eissn1573-1464
dc.identifier.issn1387-3547
dc.identifier.urihttp://hdl.handle.net/10400.3/6052
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relationMammal introductions on oceanic islands across a human disturbance gradient: conservation implications for the Azores islands.
dc.relation.publisherversionhttps://link.springer.com/article/10.1007/s10530-021-02535-2pt_PT
dc.subjectAzoresen
dc.subjectBiological Invasionsen
dc.subjectBottom-up regulationen
dc.subjectCamera-trappingen
dc.subjectCarnivoresen
dc.subjectMesopredator Release Effecten
dc.subjectOceanic Islandsen
dc.subjectRodentsen
dc.titleFactors influencing the relative abundance of invasive predators and omnivores on islandsen
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMammal introductions on oceanic islands across a human disturbance gradient: conservation implications for the Azores islands.
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/SFRH%2FBD%2F115022%2F2016/PT
oaire.citation.conferencePlaceSwitzerlanden
oaire.citation.endPage2830pt_PT
oaire.citation.issue(9)pt_PT
oaire.citation.startPage2819pt_PT
oaire.citation.titleBiological Invasionsen
oaire.citation.volume23pt_PT
oaire.fundingStreamOE
person.familyNameLamelas López
person.givenNameLucas
person.identifier.ciencia-id1F1B-49B1-E748
person.identifier.orcid0000-0002-2230-7033
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication4b3b7be3-7ec3-45c7-a22b-3cb152a0132e
relation.isAuthorOfPublication.latestForDiscovery4b3b7be3-7ec3-45c7-a22b-3cb152a0132e
relation.isProjectOfPublication6e3402e8-ecb9-41d2-a047-a74b4a97a532
relation.isProjectOfPublication.latestForDiscovery6e3402e8-ecb9-41d2-a047-a74b4a97a532

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