Holocene palaeoecology and climate history of South Georgia (sub-Antarctica) based on a macrofossil record of bryophytes and seeds

The results are presented of a detailed plant macrofossil analysis of a( 14 C dated Holocene organic sequence from a sub-Antarctic island, South Georgia. In the peat infilling of a rock basin 31 bryophyte species and many of the principal species of the present-day angiosperm flora, associated with bog communities, have been identified. The zonation of the bryophytes and the seeds and fruits shows a striking correspondence with the sediment stratigraphy, and indicates five ecological phases. The first four reflect a succession from a minerotrophic shallow pool to an ombrotrophic W arnstorfia-Polytrichum bog. After the deposition of a greyish-brown layer, c. 2200 14 C years BP, a wet Deschampsia-Warnstorfia-Sanionia-Rostkovia bog came into existence, which is still present today. The ecological phases are radiocarbon dated. They can be interpreted in terms of climate development during the Holocene. Climate ameliorated rapidly at about 10 000 14 C years BP followed by a drier period. Around 7000 14C years BP the climate became wetter and the following c. 2500years probably represent the climatic optimum. Between 4500 and 2600 14 C years BP, drier conditions prevailed at the study site. The most striking change occurred at 2600 14 C years BP when a marked change in vegetation and ecology indicates much wetter conditions

Biology · Bog · Ecological succession · Geography · Holocene · Holocene climatic optimum · Macrofossil · Ombrotrophic · Paleoecology · Peat · Physical geography · Radiocarbon dating · Subfossil · Vegetation (pathology · Geology and Paleoclimatology Research · Indigenous Studies and Ecology · Pleistocene-Era Hominins and Archaeology · Ecology · Geology · Oceanography · Paleontology

• Holocene glacier fluctuations and environmental changes in subantarctic South Georgia inferred from a sediment record from a coastal inlet

  Open Access•Sonja Berg, Duanne White et al.•Quaternary Research•2019

  Añadir item

• Prehistoric habitat stability and post-settlement habitat change in a Chesapeake Bay freshwater tidal wetland, USA

  Open Access•William B Hilgartner, Grace S Brush•The Holocene•2006

  Añadir item

• Subantarctic peatlands and their potential as palaeoenvironmental and palaeoclimatic archives

  Open Access•N Van der Putten, D Mauquoy et al.•Quaternary International•2012

  Añadir item

• Late-Holocene expansion of a south Swedish peatland and its impact on marginal ecosystems

  Open Access•Johannes Edvardsson, Anneli Poska et al.•The Holocene•2014

  Añadir item

• Pollen evidence of variations in Holocene climate and Southern Hemisphere Westerly Wind strength on sub-Antarctic South Georgia

  Open Access•Maaike Zwier, Willem G M Van Der Bilt et al.•The Holocene•2021

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• Middle-Holocene alluvial forests and associated fluvial environments

  Open Access•Koen Deforce, Annelies Storme et al.•The Holocene•2014

  Añadir item

• Is palynology a credible climate proxy in the Subantarctic

  Open Access•Nathalie Van der Putten, Cyriel Verbruggen et al.•The Holocene•2012

  Añadir item

• Changes in Holocene climate and the intensity of Southern Hemisphere Westerly Winds based on a high-resolution palynological record from sub-Antarctic South Georgia

  Open Access•Stephanie L Strother, Ulrich Salzmann et al.•The Holocene•2014

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• Investigating Subantarctic 14 C Ages of Different Peat Components

  Open Access•Zoë Thomas, Chris Turney et al.•Radiocarbon•2019

  Añadir item

• Polar Perspective of Late-Quaternary Climates in the Southern Hemisphere

  Open Access•Calvin J Heusser•Quaternary Research•1989

  Añadir item

• Late-Glacial and Holocene Glacier Fluctuations and Environmental Change on South Georgia, Southern Ocean

  Open Access•Chalmers M Clapperton, David E Sugden et al.•Quaternary Research•1989

  Añadir item

• Future uses of pollen analysis must include plant macrofossils

  Open Access•Hilary H Birks, H J B Birks•Journal of Biogeography•2000

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• Palaeolimnological evidence for marked Holocene environmental changes on Signy Island, Antarctica

  Open Access•Vivienne J Jones, D A Hodgson et al.•The Holocene•2000

  Añadir item

• Climatic change in Chile at around 2700 BP and global evidence for solar forcing

  Open Access•Bas Van Geel, Calvin J Heusser et al.•The Holocene•2000

  Añadir item

• Radiocarbon Calibration and Analysis of Stratigraphy

  Open Access•Christopher B Ramsey•Radiocarbon•1995

  Añadir item