Please use this identifier to cite or link to this item: http://buratest.brunel.ac.uk/handle/2438/11242
Title: Biomass-modulated fire dynamics during the last glacial-interglacial transition at the central pyrenees (Spain)
Authors: Gil-Romera, G
González-Sampériz, P
Lasheras-Álvarez, L
Sevilla-Callejo, M
Moreno, A
Valero-Garcés, B
López-Merino, L
Carrión, JS
Pérez Sanz, A
Aranbarri, J
García-Prieto Fronce, E
Keywords: Fire history;Quaternary;Lateglacial;Palaeoecology;Historical biogeography;Iberian Peninsula
Issue Date: 2014
Publisher: Elsevier
Citation: Palaeogeography, Palaeoclimatology, Palaeoecology, 402: pp.113 - 124, (2014)
Abstract: Understanding long-term fire ecology is essential for current day interpretation of ecosystem fire responses. However palaeoecology of fire is still poorly understood, especially at high-altitude mountain environments, despite the fact that these are fire-sensitive ecosystems and their resilience might be affected by changing fire regimes. We reconstruct wildfire occurrence since the Lateglacial (14.7. cal. ka BP) to the Mid-Holocene (6. cal. ka BP) and investigate the climate-fuel-fire relationships in a sedimentary sequence located at the treeline in the Central Spanish Pyrenees. Pollen, macro- and micro-charcoal were analysed for the identification of fire events (FE) in order to detect vegetation post-fire response and to define biomass-fire interactions. mean fire intervals (mfi) reduced since the Lateglacial, peaking at 9-7.7. cal. ka BP while from 7.7 to 6. cal. ka BP no fire is recorded. We hypothesise that Early Holocene maximum summer insolation, as climate forcing, and mesophyte forest expansion, as a fuel-creating factor, were responsible for accelerating fire occurrence in the Central Pyrenees treeline. We also found that fire had long-lasting negative effects on most of the treeline plant communities and that forest contraction from 7.7. cal. ka BP is likely linked to the ecosystem's threshold response to high fire frequencies.
URI: http://www.sciencedirect.com/science/article/pii/S0031018214001229
http://bura.brunel.ac.uk/handle/2438/11242
DOI: http://dx.doi.org/10.1016/j.palaeo.2014.03.015
ISSN: 0031-0182
Appears in Collections:Institute for the Environment

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