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dc.contributor.authorPancotto, VAen
dc.contributor.authorPayne, RJen
dc.date.accessioned2017-02-08T15:39:33Z
dc.date.available2017-02-08T15:39:33Z
dc.date.issued2016-03-01en
dc.identifier.issn0959-6836en
dc.identifier.urihttp://hdl.handle.net/10026.1/8435
dc.description.abstract

© 2015, © The Author(s) 2015. The ombrotrophic peat bogs of Tierra del Fuego are located within the southern westerly wind belt (SWWB), which dominates climate variability in this region. We have reconstructed late-Holocene water-table depths from three peat bogs and aimed to relate these records to shifts in regional climate. Water-table depths were quantified by the analysis of testate amoeba assemblages, and a regional transfer function was used to infer past water-table depths. During the last 2000 years, testate amoeba assemblages have been relatively stable, with a dominance of Difflugia pulex and Difflugia pristis type, and an increase in Assulina muscorum and other Euglyphida at the top of each section. Multivariate analyses show that water-table depth remained the main environmental variable explaining assemblages along the TiA12 core, but reconstructions were not significant for the two other cores. In line with the low variability in assemblages, water tables were relatively stable during the last 2000 years. Slightly wetter conditions were found between ~1400 and 900 cal. BP and a pronounced recent dry shift was reconstructed in all of the three peat profiles. Considering the regional climatic context, this recent shift may have been forced by a decrease in precipitation and warmer conditions linked to an increase in the importance of the SWWB. Nevertheless, we cannot exclude the influence of higher UV-B radiation resulting from the local degradation of the ozone layer since the late 1970s, which may have had an additional effect on the relative presence of A. muscorum in the southern Patagonian region.

en
dc.format.extent489 - 501en
dc.language.isoenen
dc.titleLate-Holocene climate dynamics recorded in the peat bogs of Tierra del Fuego, South Americaen
dc.typeJournal Article
plymouth.issue3en
plymouth.volume26en
plymouth.publication-statusPublisheden
plymouth.journalHoloceneen
dc.identifier.doi10.1177/0959683615609756en
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/00 Groups by role
plymouth.organisational-group/Plymouth/00 Groups by role/Academics
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Geography, Earth and Environmental Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA14 Geography and Environmental Studies
plymouth.organisational-group/Plymouth/Research Groups
plymouth.organisational-group/Plymouth/Research Groups/Centre for Research in Environment and Society (CeRES)
dc.identifier.eissn1477-0911en
dc.rights.embargoperiodNo embargoen
rioxxterms.versionofrecord10.1177/0959683615609756en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.typeJournal Article/Reviewen
plymouth.oa-locationhttp://journals.sagepub.com/doi/10.1177/0959683615609756en


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