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dc.contributor.authorBartlett, Jesamine
dc.contributor.authorConvey, Peter
dc.contributor.authorHughes, K.A.
dc.contributor.authorThorpe, S.E.
dc.contributor.authorHayward, S.A.L.
dc.coverage.spatialSigny Island, South Orkney Islands, South Georgia, Antarcticaen_US
dc.identifier.citationPolar Biology. 2021, 44 (1), 209-216.en_US
dc.description.abstractThe non-native midge Eretmoptera murphyi is Antarctica’s most persistent non-native insect and is known to impact the terrestrial ecosystems. It inhabits by considerably increasing litter turnover and availability of soil nutrients. The midge was introduced to Signy Island, South Orkney Islands, from its native South Georgia, and routes of dispersal to date have been aided by human activities, with little known about non-human-assisted methods of dispersal. This study is the frst to determine the potential for dispersal of a terrestrial invertebrate species in Antarctica by combining physiological sea water tolerance data with quantitative assessments of ocean current journey times. Fourth instar larvae tolerated sea water submer gence for up to 21 days, but submerged egg sacs had signifcantly reduced hatching success. Using near-surface drifter data, we conclude that ocean current dispersal from Signy Island would not present a risk of species transfer beyond the South Orkney Islands on the tested timescales. However, if E. murphyi were to be introduced to the South Shetlands Islands or Adelaide Island, which are located ofshore of the Antarctic Peninsula, there would be a risk of successful oceanic dispersal to neighbouring islands and the Antarctic Peninsula mainland. This study emphasises the need for efective biosecurity measures and demonstrates the role that currently undocumented pathways may have in dispersing non-native species.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.subjectNear-surface driftersen_US
dc.subjectSalinity toleranceen_US
dc.subjectInvasive speciesen_US
dc.subjectClimate changeen_US
dc.titleOcean currents as a potential dispersal pathway for Antarctica’s most persistent non-native terrestrial insecten_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2021 The Authorsen_US
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480en_US
dc.subject.nsiVDP::Zoology and botany: 480en_US
dc.source.journalPolar Biologyen_US
dc.relation.projectAndre: d British Antarctic Survey (Grant No. CASS121)en_US
dc.relation.projectAndre: Natural Environment Research Council (Grant No. RRBN19276en_US

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal