Occurrence of the Non-Native Annual Bluegrass on the Antarctic Mainland and Its Negative Effects on Native Plants

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dc.contributor.authorMolina-Montenegro, Marco A.
dc.contributor.authorCarrasco-Urra, Fernando
dc.contributor.authorRodrigo, Cristian
dc.contributor.authorConvey, Peter
dc.contributor.authorValladares, Fernando
dc.contributor.authorGianoli, Ernesto
dc.date.accessioned2025-01-20T23:57:28Z
dc.date.available2025-01-20T23:57:28Z
dc.date.issued2012
dc.description.abstractFew non-native species have colonized Antarctica, although increased human activity and accelerated climate change may increase their number, distributional range, and effects on native species on the continent. We searched 13 sites on the maritime Antarctic islands and 12 sites on the Antarctic Peninsula for annual bluegrass (Poa annua), a non-native flowering plant. We also evaluated the possible effects of competition between P. annua and 2 vascular plants native to Antarctica, Antarctic pearlwort (Colobanthus quitensis) and Antarctic hairgrass (Deschampsia antarctica). We grew the native species in experimental plots with and without annual bluegrass under conditions that mimicked the Antarctic environment. After 5 months, we measured photosynthetic performance on the basis of chlorophyll fluorescence and determined total biomass of both native species. We found individual specimens of annual bluegrass at 3 different sites on the Antarctic Peninsula during the 20072008 and 20092010 austral summers. The presence of bluegrass was associated with a statistically significant reduction in biomass of pearlwort and hairgrass, whereas the decrease in biomass of bluegrass was not statistically significant. Similarly, the presence of bluegrass significantly reduced the photosynthetic performance of the 2 native species. Sites where bluegrass occurred were close to major maritime routes of scientific expeditions and of tourist cruises to Antarctica. We believe that if current levels of human activity and regional warming persist, more non-native plant species are likely to colonize the Antarctic and may affect native species.
dc.fuente.origenWOS
dc.identifier.doi10.1111/j.1523-1739.2012.01865.x
dc.identifier.issn0888-8892
dc.identifier.urihttps://doi.org/10.1111/j.1523-1739.2012.01865.x
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95207
dc.identifier.wosidWOS:000306559300016
dc.issue.numero4
dc.language.isoen
dc.pagina.final723
dc.pagina.inicio717
dc.revistaConservation biology
dc.rightsacceso restringido
dc.subjectColobanthus quitensis
dc.subjectDeschampsia antarctica
dc.subjecthairgrass
dc.subjectnon-native species
dc.subjectpearlwort
dc.subjectspecies competition
dc.subjecttourism
dc.subjectPoa annua
dc.subjectColobanthus quitensis
dc.subjectcompetencia de especies
dc.subjectDeschampsia antarctica
dc.subjectespecie no nativa
dc.subjectPoa annua
dc.subjectturismo
dc.subject.ods13 Climate Action
dc.subject.ods14 Life Below Water
dc.subject.ods15 Life on Land
dc.subject.odspa13 Acción por el clima
dc.subject.odspa14 Vida submarina
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleOccurrence of the Non-Native Annual Bluegrass on the Antarctic Mainland and Its Negative Effects on Native Plants
dc.typeartículo
dc.volumen26
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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