Paleoenvironmental Reconstruction for the Last 3500 Years in the Southern Pyrenees from a Peat Bog Core in Clots de Rialba
Rodríguez-González, J.M. (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Sánchez-Morales, M. (Universitat de Vic - Universitat Central de Catalunya. Departament de Biociències)
Nadal Tersa, Jordi (Universitat Autònoma de Barcelona. Departament de Geografia)
Pèlachs Mañosa, Albert (Universitat Autònoma de Barcelona. Departament de Geografia)
Pérez Obiol, Ramon (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)

Data:	2023
Resum:	Vegetation landscape dynamics are derived from the relationships established between anthropic activities and climate conditions over time. Paleoenvironmental research in the Pyrenees range (north-eastern Iberian Peninsula) has revealed what these dynamics were like in some regions during the Holocene. However, some fields of biogeography still present questions that need to be addressed, such as the patterns of Fagus sylvatica and Abies alba and the importance of the fire regime during the Meghalayan (late Holocene). We present a multiproxy study performed in a sedimentary record from the Clots de Rialba peat bog, located at 2093 m a. s. l. (Lleida, southern slope of the Pyrenees mountain range), that covers the last c. 3500 years. Analyses were performed on the organic matter content, pollen, non-pollen palynomorphs, and sedimentary charcoals larger than 150 μm. The palynological spectra revealed a maximum extension of Abies alba at about 3500 cal yr BP in the Bronze Age, while Fagus sylvatica showed its maximum extent between 3300 and 2800 cal yr BP. A dominance of Pinus was detected throughout the studied period. Other taxa such as cereals, herbaceous plants, aquatic plants, and coprophilous fungi have also been discussed to identify anthropic pressure and climate pulses. In addition, the study of sedimentary charcoals reveals the main forest fire episodes and their recurrences, some of them linked to anthropogenic activities and/or climate variations. These anthropogenic activities would include the use of opening and maintaining forest fires in deforestation in order to obtain pastures and spaces dedicated to cereal agriculture and the appearance of some taxa linked to or introduced by human communities.
Ajuts:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2014-SGR-1090 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017-SGR-00343 Ministerio de Economía y Competitividad CSO2012-39680-C02-02 Ministerio de Economía y Competitividad CSO2015-65216-C2-1-P Agencia Estatal de Investigación PID2019-108282GB-I00
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	Diversity, Vol. 15 Núm. 3 (march 2023) , p. 390, ISSN 1424-2818

DOI: 10.3390/d15030390

17 p, 4.1 MB

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