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The role of the soil seed store in the survival of an invasive population of Poa annua at Point Thomas Oasis, King George Island, maritime Antarctica

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cris.lastimport.scopus2024-02-12T19:01:32Z
dc.abstract.enPoa annua, an invasive species in the Antarctic, had established a relatively large popu-lation at Point Thomas Oasis (Maritime Antarctic) recorded from 1985/1986 austral sum-mer. We present a detailed account of the expansion ofP. annuaacross its 30 years ofestablishment (1985/1986, 1986/1987, 1987/1988, 1989/1990 and 1991/1992ehistoricdata, 2014/2015 and 2015/2016eour own observations) and how this relates to the his-torical human activity at this site. We also evaluate thefirst stages of the control effort, i.e.tussock removal by hand. For a subset of the removed tussocks we also removed soil inorder to assess the importance of the soil seed bank in the course of this invasion. Thepopulation showed a spatio-temporal dynamic increase in area from 1985/1986 to 1987/1988 growing season followed by a decrease in area noted in 1989/1990 and subsequentincrease in area and diversity of occupied habitats. Analysis of distribution dynamics didnot show a significant difference in the number of tussocks recorded in the 2014/2015austral summer between cartogram squares occupied in 1991/1992 or earlier, and thoseoccupied just in 2014/2015. There was, however, a high correlation in the number oftussocks per square between the 2014/2015 and 2015/2016 census. Field observationsconducted in 2015/2016 within the whole Point Thomas Oasis indicated that on 6 out of 51sites cleared during the 2014/2015 austral summer,P. annuahad re-established, mostly onsites where no soil was collected. Of the soil samples removed from beneath tussocks, seedgerminated in 19% of the samples (160 seedlings in total). These results indicate that thestrategy of soil seed bank formation has been very effective in extreme Antarctic condi-tions, providing a‘temporal rescue effect’which has enabled the survival of the popula-tion, and hinders the effective eradication of this invasive species.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorGalera, Halina
dc.contributor.authorCzyż, Ewa
dc.contributor.authorWódkiewicz, Maciej
dc.contributor.authorZnój, Anna
dc.contributor.authorChwedorzewska, Katarzyna
dc.contributor.authorRudak, Agnieszka
dc.date.accessioned2024-01-26T10:47:06Z
dc.date.available2024-01-26T10:47:06Z
dc.date.issued2019
dc.description.financeNie dotyczy
dc.description.volume19
dc.identifier.doi10.1016/J.GECCO.2019.E00679
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/123082
dc.identifier.weblinkhttps://www.sciencedirect.com/science/article/pii/S235198941830458X
dc.languageeng
dc.pbn.affiliationbiological sciences
dc.relation.ispartofGlobal Ecology and Conservation
dc.relation.pages1-16
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enseed germination
dc.subject.entemporal rescue effect
dc.subject.encartogram
dc.subject.eneradication
dc.titleThe role of the soil seed store in the survival of an invasive population of Poa annua at Point Thomas Oasis, King George Island, maritime Antarctica
dc.typeJournalArticle
dspace.entity.typePublication