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100 _aMagne, Gwenael
_951537
245 _aLacustrine charcoal peaks provide an accurate record of surface wildfires in a North European boreal forest/
260 _bSage,
_c2020.
300 _aVol. 30, issue 3, 2020 ( 380–388 p.).
520 _aWe evaluated the skills of different palaeofire reconstruction techniques to reconstruct the fire history of a boreal landscape (Russian Karelia) affected by surface fires. The analysis of dated lacustrine sediments from two nearby lakes was compared with independent dendrochronological dating of fire scars, methods which have rarely been used in context of surface fires. We used two sediment sub-sampling volumes (1 and 3.5 cm3, wet volumes) and three methods of calculating the Charcoal Accumulation Rate to reconstruct fire histories: CHAR number, charcoal surface area and estimated charcoal volume. The results show that palaeofire reconstructions obtained with fossil charcoal data from lake sediments and dendrochronology are similar and complementary. Dendrochronological reconstruction of fire scars established 12 fire dates over the past 500 years, and paleo-data from lake sediments identified between 7 and 13 fire events. Several ‘false fire events’ were also recorded in the charcoal chronologies, likely because of errors associated with the estimation of the sediment accumulation rate in the unconsolidated part of the sediment. The number of replicates, that is, number of sub-samples and lakes analyzed, had an effect on the number of identified fire events, whereas no effect was seen in the variation in the analyzed sediment volume or the choice of the charcoal-based metric. Whenever possible, we suggest the use of the dendrochronological data as an independent control for the calibration of charcoal peak series, which helps provide more realistic millennia-long reconstruction of past fire activity. We also argue for the use of 1 cm3 sample volume, a sampling protocol involving sampling of more than one lake, and sufficient number of intra-sample replicates to achieve skilful reconstructions of past fire activity.
700 _aBrossier, Benoit
_958854
700 _aGandouin, Emmanuel
_958855
700 _aParadis, Laure
_958856
700 _aDrobyshev, Igor
_958857
700 _aKryshen, Alexander
_958858
700 _aHely, Christelle
_958802
700 _aAlleaume, Samuel
_958859
700 _aAli, Adam A
_958860
773 0 _012756
_917200
_dLondon: Sage Publication Ltd, 2019.
_tHolocene/
_x09596836
856 _uhttps://doi.org/10.1177/0959683619887420
942 _2ddc
_cEJR
999 _c15034
_d15034