Gastropods alien to South Africa cause severe environmental harm in their global alien ranges across habitats

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dc.contributor.authorKesner, Daviden_ZA
dc.contributor.authorKumschick, Sabrinaen_ZA
dc.date.accessioned2019-09-17T12:27:34Z
dc.date.available2019-09-17T12:27:34Z
dc.date.issued2018
dc.descriptionCITATION: Kesner, D. & Kumschick, S. 2018. Gastropods alien to South Africa cause severe environmental harm in their global alien ranges across habitats. Ecology and Evolution, 8(16):8273-8285, doi:10.1002/ece3.4385.en_ZA
dc.descriptionThe original publication is available at https://onlinelibrary.wiley.comen_ZA
dc.description.abstractAlien gastropods have caused extensive harm to biodiversity and socioeconomic systems like agriculture and horticulture worldwide. For conservation and management purposes, information on impacts needs to be easily interpretable and comparable, and the factors that determine impacts understood. This study aimed to assess gastropods alien to South Africa to compare impact severity between species and understand how they vary between habitats and mechanisms. Furthermore, we explore the relationship between environmental and socioeconomic impacts, and both impact measures with life‐history traits. We used the Environmental Impact Classification for Alien Taxa (EICAT) and Socio‐Economic Impact Classification for Alien Taxa (SEICAT) to assess impacts of 34 gastropods alien to South Africa including evidence of impact from their entire alien range. We tested for correlations between environmental and socioeconomic impacts per species, and with fecundity and native latitude range using Kendall's tau tests. Kruskal–Wallis tests were used to compare impact magnitude among mechanisms and habitats, respectively. This study presents the first application of EICAT and SEICAT for invertebrates. There was no correlation between environmental impacts and socioeconomic impacts. Habitats did not differ regarding the severity of impacts recorded, but impacts via disease transmission were lower than other mechanisms. Neither fecundity nor native range latitude was correlated with impact magnitude. Despite gastropods being agricultural and horticultural pests globally, resilience of socioeconomic systems makes high impacts uncommon. Environmental systems may be vulnerable to gastropod impacts across habitats, having experienced multiple local extinctions of wetland island snail fauna. South Africa stands out as the only continental country that follows this trend. The knowledge gained on severity and nature of gastropod impacts is useful in risk assessment, which can aid conservation management. To make impact assessments more realistic, we suggest alternative ways of reporting impacts classified under EICAT and SEICAT.en_ZA
dc.description.sponsorshipSouth African National Department of Environmental Affairsen_ZA
dc.description.sponsorshipNational Research Foundationen_ZA
dc.description.sponsorshipDST-NRF Centre of Excellence for Invasion Biologyen_ZA
dc.description.sponsorshipSouth African National Biodiversity Instituteen_ZA
dc.description.urihttps://onlinelibrary.wiley.com/doi/full/10.1002/ece3.4385
dc.description.versionPublisher's versionen_ZA
dc.format.extent13 pages : illustrationsen_ZA
dc.identifier.citationKesner, D. & Kumschick, S. 2018. Gastropods alien to South Africa cause severe environmental harm in their global alien ranges across habitats. Ecology and Evolution, 8(16):8273-8285, doi:10.1002/ece3.4385en_ZA
dc.identifier.issn2045-7758 (online)
dc.identifier.otherdoi:10.1002/ece3.4385
dc.identifier.urihttp://hdl.handle.net/10019.1/106481
dc.language.isoen_ZAen_ZA
dc.publisherWiley Open Accessen_ZA
dc.rights.holderAuthors retain copyrighten_ZA
dc.subjectGastropodaen_ZA
dc.subjectAlien gastropods -- South Africaen_ZA
dc.subjectIntroduced organisms -- Classificationen_ZA
dc.subjectConservation biologyen_ZA
dc.subjectSouth Africa -- Environmental aspectsen_ZA
dc.titleGastropods alien to South Africa cause severe environmental harm in their global alien ranges across habitatsen_ZA
dc.typeArticleen_ZA
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