Holocene treeline history of a high-mountain landscape inferred from soil charcoal: The case of Sierra de Gredos (Iberian Central System, SW Europe)
| Autor: | J.M. Rubiales, Ignacio García-Amorena, Philippe Allée, Salvia García Álvarez, Marie-Claude Bal |
|---|---|
| Přispěvatelé: | Laboratoire de Géographie Physique et Environnementale (GEOLAB), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Université Clermont Auvergne (UCA)-Institut Sciences de l'Homme et de la Société (IR SHS UNILIM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Departamento de Silvopascicultura, Universidad Politécnica de Madrid (UPM), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut Sciences de l'Homme et de la Société (IR SHS UNILIM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
010506 paleontology
geography.geographical_feature_category 010504 meteorology & atmospheric sciences Fire regime Range (biology) Ecology Vegetation [SHS.GEO]Humanities and Social Sciences/Geography 15. Life on land 01 natural sciences Shrubland Geography Deciduous visual_art visual_art.visual_art_medium Transect Charcoal Holocene ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | Quaternary International Quaternary International, Elsevier, 2017, 457, pp.85-98. ⟨10.1016/j.quaint.2017.04.019⟩ Quaternary International, 2017, 457, pp.85-98. ⟨10.1016/j.quaint.2017.04.019⟩ |
| ISSN: | 1040-6182 |
| Popis: | Unravelling the precise Holocene altitudinal fluctuation of the highland vegetation communities (>1800 m asl) in the Gredos Range (Central System, Spain) is challenging owing to the complexity of the long-term human-environmental interactions in the area. Aiming at improving the knowledge of these highland dynamics, a pedoanthracological analysis was conducted on six soil profiles located on the northern slope of the central sector of the Gredos Range, following an altitudinal transect between 2200 and 1700 m asl in the Las Pozas valley. The soil charcoal analysis revealed the long-term stability of the Leguminosae shrublands, which have dominated the landscape over 1800 m asl since the Early Holocene. The highest ancient timberline was stimated to be at approximately 1700 m asl in this valley, from the Early Holocene until the beginning of the Late Holocene. This ancient forest contained Pinus gr. sylvestris, with significant numbers of deciduous Quercus. However, scattered individuals or small groves of pioneer deciduous taxa (Betula sp., Populus sp., Salix sp., Maloideae and Prunus sp.) were found to have thrived over the timberline during the Early and Middle Holocene, especially between 1900 and 2000 m asl. The highest treeline was marked by Betula at 2100 m asl. Elevated values of charcoal concentration reflect the intense fire regime of the area. The pattern of fire events accumulation periods that can be inferred from the 23 dated charcoal samples is consistent with previous data, which supports an increase in fire frequency around 2000 cal yr BP, during the first reported period of significant human influence. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect