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Falkland Island peatland development processes and the pervasive presence of fire

Research output: Contribution to journalArticlepeer-review

Open Access Status

  • Embargoed (until 14/06/21)

Author(s)

Dimitri Mauquoy, Richard Payne, Kirill Babeshko, Rebecca Bartlett, Ian Boomer, Hannah Bowey, Chris Evans, Fin Ring-Hrubesh, David Muirhead , Matthew O'Callaghan, Natalia Piotrowska, Graham Rush, Thomas Sloan, Craig Smeaton, Andrey Tsyganov, Yuri Mazei

School/Research organisations

Abstract

Palaeoecological analyses of Falkland Island peat profiles have largely been confined to pollen analyses. In order to improve understanding of long-term Falkland Island peat development processes, the plant macrofossil and stable isotope stratigraphy of an 11,550 year Falkland Island Cortaderia pilosa (‘whitegrass’) peat profile was investigated. The peatland developed into an acid, whitegrass peatland via a poor fen stage. Macrofossil charcoal indicate that local fires have frequently occurred throughout the development of the peatland. Raman spectroscopy analyses indicate changes in the intensity of burning which are likely to be related to changes in fuel types, abundance of fine fuels due to reduced evapotranspiration/higher rainfall (under weaker Southern Westerly Winds), peat moisture and human disturbance. Stable isotope and thermogravimetric analyses were used to identify a period of enhanced decomposition of the peat matrices dating from ∼7020 cal yr BP, which possibly reflects increasing strength of the Southern Westerly winds. The application of Raman spectroscopy and thermogravimetric analyses to the Falkland Island peat profile identified changes in fire intensity and decomposition which were not detectable using the techniques of macrofossil charcoal and plant macrofossil analyses.
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Details

Original languageEnglish
Article number106391
Number of pages11
JournalQuaternary Science Reviews
Volume240
Early online date14 Jun 2020
DOIs
Publication statusPublished - 15 Jul 2020

    Research areas

  • Holocene, Raman spectroscopy, Fire, Peat, Falkland Islands, Charcoal, Testate amoebae, Thermogravimetric analysis, Fire Vegetation dynamics, Southern westerly wind

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