Volcanic ash deposition and long-term vegetation change on subantarctic Marion Island
Yeloff, Dan, Mauquoy, Dmitri, Barber, Keith, Way, Susannah, van Geel, Bas and Turney, Chris S.M. (2007) Volcanic ash deposition and long-term vegetation change on subantarctic Marion Island. Arctic, Antarctic and Alpine Research, 39, (3), 500-511. (doi:10.1657/1523-0430(06-040)[YELOFF]2.0.CO;2).
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A c. 5500 year record of peatland development and vegetation change was generated
from a core recovered from an Agrostis magellanica peat bog on subantarctic Marion
Island, using palynomorph, plant macrofossil, and tephra analyses. Two tephra
horizons (both 17 cm thick) were identified and dated to ca. 2900 cal. BP and ca.
1700 cal. BP. Succession of the vegetation as a consequence of tephra deposition,
particularly by the pioneer Azorella selago, appears to have been very slow, lasting as
long as c. 700 yr. The slow pace of vegetation succession highlights the sensitivity of
the indigenous Marion Island flora to environmental change, and the vulnerability to
the spread of alien invasive species.
|Subjects:||G Geography. Anthropology. Recreation > G Geography (General)
G Geography. Anthropology. Recreation > GE Environmental Sciences
G Geography. Anthropology. Recreation > GB Physical geography
|Divisions:||University Structure - Pre August 2011 > School of Geography > Environmental Processes and Change
|Date Deposited:||06 Aug 2008|
|Last Modified:||27 Mar 2014 18:38|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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