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Journal of Mountain Science

, Volume 13, Issue 10, pp 1760–1772 | Cite as

Mid and late Holocene forest fires and deforestation in the subalpine belt of the Iberian range, northern Spain

  • José M. García-Ruiz
  • Yasmina Sanjuán
  • Graciela Gil-Romera
  • Penélope González-Sampériz
  • Santiago Beguería
  • José Arnáez
  • Paz Coba-Pérez
  • Amelia Gómez-Villar
  • Javier Álvarez-Martínez
  • Noemí Lana-Renault
  • Estela Pérez-Cardiel
  • Carlos López de Calle
Article

Abstract

The conversion of subalpine forests into grasslands for pastoral use is a well-known phenomenon, although for most mountain areas the timing of deforestation has not been determined. The presence of charcoal fragments in soil profiles affected by shallow landsliding enabled us to date the occurrence of fires and the periods of conversion of subalpine forest into grasslands in the Urbión Mountains, Iberian Range, Spain. We found that the treeline in the highest parts of the northwestern massifs of the Iberian Range (the Urbión, Demanda, Neila, and Cebollera massifs) is currently between 1500 and 1600 m a.s.l., probably because of pastoral use of the subalpine belt, whereas in the past it would have reached almost the highest divides (at approximately 2100–2200 m a.s.l.). The radiocarbon dates obtained indicate that the transformation of the subalpine belt occurred during the Late Neolithic, Chalcolithic, Bronze Age, Iron Age, and Middle Ages. Forest clearing was probably moderate during fires prior to the Middle Ages, as the small size of the sheep herds and the local character of the markets only required small clearings, and therefore more limited fires. Thus, it is likely that the forest recovered burnt areas in a few decades; this suggests the management of the forest and grasslands following a slash-and-burn system. During the Middle and Modern Ages deforestation and grassland expansion affected most of the subalpine belt and coincided with the increasing prevalence of transhumance, as occurred in other mountains in the Iberian Peninsula (particularly the Pyrenees). Although the occurrence of shallow landslides following deforestation between the Neolithic and the Roman Period cannot be ruled out, the most extensive shallow landsliding processes would have occurred from the Middle Ages until recent times.

Keywords

Forest fires Holocene Subalpine grasslands Shallow landslides Landscape changes Iberian Range 

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Copyright information

© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • José M. García-Ruiz
    • 1
  • Yasmina Sanjuán
    • 1
  • Graciela Gil-Romera
    • 1
  • Penélope González-Sampériz
    • 1
  • Santiago Beguería
    • 2
  • José Arnáez
    • 3
  • Paz Coba-Pérez
    • 4
  • Amelia Gómez-Villar
    • 5
  • Javier Álvarez-Martínez
    • 6
  • Noemí Lana-Renault
    • 3
  • Estela Pérez-Cardiel
    • 7
  • Carlos López de Calle
    • 8
  1. 1.Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas (IPE-CSIC)Campus de Aula DeiZaragozaSpain
  2. 2.Estación Experimental de Aula Dei, Consejo Superior de Investigaciones Científicas (EEAD-CSIC)Campus de Aula DeiZaragozaSpain
  3. 3.Area of Physical GeographyUniversity of La RiojaLogroñoSpain
  4. 4.Centro de Investigaciones en Geografía AmbientalUniversidad Nacional Autónoma de México, Unidad MoreliaMorelia, MichoacánMéxico
  5. 5.Departamento de Geografía y Geología, Facultad de Filosofía y LetrasUniversidad de León, Campus de VegazanaLeónSpain
  6. 6.Departamento de Ingeniería Agrícola y ForestalUniversidad de Valladolid, Campus La YuteraPalenciaSpain
  7. 7.Department of Geography and Land ManagementUniversity of ZaragozaZaragozaSpain
  8. 8.LogroñoSpain

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