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Campo DC | Valor | Idioma |
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dc.contributor.author | Nagy, Jennifer | - |
dc.contributor.author | Nagy, László | - |
dc.contributor.author | Legg, Colin J. | - |
dc.contributor.author | Grace, John | - |
dc.date.accessioned | 2020-06-15T21:49:58Z | - |
dc.date.available | 2020-06-15T21:49:58Z | - |
dc.date.issued | 2013 | - |
dc.identifier.uri | https://repositorio.inpa.gov.br/handle/1/17900 | - |
dc.description.abstract | Background: Changes in climate and recent land use have been related to treeline advances in many alpine and arctic regions. Short-term (<50 years) observations on treeline dynamics are available for many parts of the world; we present here millennium-scale data for a Pinus sylvestris treeline in the Cairngorms, Scotland, where a natural treeline at ca. 650 m is thought to exist at Creag Fhiaclach.Aim: We demonstrate that treeline position can be determined from an altitudinal sequence of quotients of treeline tree pollen and dwarf-shrub pollen and therefore past treeline dynamics can be deduced from quotients of the same pollen types determined from dated peat strata.Methods: Modern pollen was extracted from moss cushions and replicate peat cores were taken for pollen analysis at each of six elevations, from below the treeline at 606 m to about 100 m above the treeline at 758 m. Ratios of Pinus sylvestris to Calluna vulgaris pollen were calculated after complete pollen analysis of each of the cores and radiocarbon dating.Results: In the modern pollen most palynomorphs (96%) were either of Pinus or Calluna. The pollen analysis extracted and identified 26 palynomorphs from peat. The ratios of Pinus/(Pinus+Calluna) pollen in the sampled elevation belts suggested a relative stability of today's treeline for about the last 1000 years.Conclusions: The observed stability of treeline elevation is likely to have been caused by site conditions and land-use history (windiness, fire and grazing) that overruled a simple climate-elevation relationship. © 2013 Copyright 2013 Botanical Society of Scotland and Taylor & Francis. | en |
dc.language.iso | en | pt_BR |
dc.relation.ispartof | Volume 6, Número 1, Pags. 7-19 | pt_BR |
dc.rights | Restrito | * |
dc.subject | Bryophyta | en |
dc.subject | Calluna | en |
dc.subject | Calluna Vulgaris | en |
dc.subject | Pinus Sylvestris | en |
dc.title | The stability of the Pinus sylvestris treeline in the Cairngorms, Scotland over the last millennium | en |
dc.type | Artigo | pt_BR |
dc.identifier.doi | 10.1080/17550874.2013.770933 | - |
dc.publisher.journal | Plant Ecology and Diversity | pt_BR |
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