期刊
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
卷 402, 期 -, 页码 113-124出版社
ELSEVIER
DOI: 10.1016/j.palaeo.2014.03.015
关键词
Fire history; Quaternary; Lateglacial; Palaeoecology; Historical biogeography; Iberian Peninsula
资金
- DINAMO [CGL2009-07992, BES-2010-038593]
- DINAMO2 [CGL2012-33063]
- ARAFIRE [2012 GA LC 064]
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. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据