globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.05.024
Scopus记录号: 2-s2.0-85020852764
论文题名:
Broadleaf deciduous forest counterbalanced the direct effect of climate on Holocene fire regime in hemiboreal/boreal region (NE Europe)
作者: Feurdean A.; Veski S.; Florescu G.; Vannière B.; Pfeiffer M.; O'Hara R.B.; Stivrins N.; Amon L.; Heinsalu A.; Vassiljev J.; Hickler T.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 169
起始页码: 378
结束页码: 390
语种: 英语
英文关键词: Baltic ; Charcoal morphologies ; Fire frequency ; Fire severity/area burnt ; Picea abies ; Pinus sylvestis ; Surface vs. crown fires ; Vegetation dynamics
英文摘要: Disturbances by fire are essential for the functioning of boreal/hemiboreal forests, but knowledge of long-term fire regime dynamics is limited. We analysed macrocharcoal morphologies and pollen of a sediment record from Lake Lielais Svētiņu (eastern Latvia), and in conjunction with fire traits analysis present the first record of Holocene variability in fire regime, fuel sources and fire types in boreal forests of the Baltic region. We found a phase of moderate to high fire activity during the cool and moist early (mean fire return interval; mFRI of ∼280 years; 11,700–7500 cal yr BP) and the late (mFRI of ∼190 years; 4500–0 cal yr BP) Holocene and low fire activity (mFRI of ∼630 years) during the Holocene Thermal Optimum (7500–4500 cal yr BP). Charcoal morphotypes and the pollen record show the predominance of frequent surface fires, occasionally transitioning to the crown during Pinus sylvestris-Betula boreal forests and less frequent surface fires during the dominance of temperate deciduous forests. In contrast to the prevailing opinion that fires in boreal forests are mostly low to moderate severity surface fires, we found evidence for common occurrence of stand-replacing crown fires in Picea abies canopy. Our results highlight that charcoal morphotypes analysis allows for distinguishing the fuel types and surface from crown fires, therefore significantly advancing our interpretation of fire regime. Future warmer temperatures and increase in the frequency of dry spells and abundant biomass accumulation can enhance the fire risk on the one hand, but will probably promote the expansion of broadleaf deciduous forests to higher latitudes, on the other hand. By highlighting the capability of broadleaf deciduous forests to act as fire-suppressing landscape elements, our results suggest that fire activity may not increase in the Baltic area under future climate change. © 2017 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59182
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作者单位: Senckenberg Biodiversity and Climate Research Centre (BiK-F), Senckenberganlage, 25, Frankfurt am Main, Germany; Department of Geology, Faculty of Biology and Geology, Babeş-Bolyai University, Kogălniceanu, 1, Cluj-Napoca, Romania; Institute of Geology, Tallinn University of Technology, Ehitajate tee 5, Tallinn, Estonia; Laboratoire Chrono-environnement UMR CNRS 6249, Maison des Sciences de l'Homme et de l'Environnement USR CNRS 3124, Université Bourgogne Franche-Comte, Besançon, France; Department of Mathematical Sciences, NTNU, Trondheim, Norway; Department of Geosciences and Geography, University of Helsinki, PO Box 64, Helsinki, Finland; Department of Geography, Faculty of Geography and Earth Sciences, University of Latvia, Riga, Jelgavas street 1, LV-1004, Latvia; Department of Physical Geography, Goethe University, Altenhöferallee 1, Frankfurt am Main, Germany

Recommended Citation:
Feurdean A.,Veski S.,Florescu G.,et al. Broadleaf deciduous forest counterbalanced the direct effect of climate on Holocene fire regime in hemiboreal/boreal region (NE Europe)[J]. Quaternary Science Reviews,2017-01-01,169
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