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  4. Impacts of regional climatic fluctuations on radial growth of Siberian and Scots pine at Mukhrino mire (central-western Siberia)
 
research article

Impacts of regional climatic fluctuations on radial growth of Siberian and Scots pine at Mukhrino mire (central-western Siberia)

Blanchet, Guillaume
•
Guillet, Sebastien
•
Calliari, Baptiste
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2017
Science Of The Total Environment

Ring width (TRW) chronologies from Siberian (Pinus sibirica) and Scots (Pinus sylvestris) pine trees were sampled at Mukhrino - a large mire complex in central-western Siberia - to evaluate the impacts of hydroclimatic variability on tree growth over the last three centuries. For this purpose, we compared climate-growth correlation profiles from trees growing on peat soils with those growing on adjacent mineral soils. Tree growth at both peat and mineral soils was positively correlated to air temperature during the vegetation period. This finding can be explained by (i) the positive influence of temperature on plant physiological processes (i.e. growth control) during the growing season and (ii) the indirect impact of air temperatures on water table fluctuations. We observe also a strong link between TRW and the winter Palmer Drought Severity Index (PDSI), especially in Siberian pine, reflecting the isolating effect of snow and limited freezing damage in roots. Significant negative relations were, by contrast, observed between bog TRW chronologies and hydroclimatic indices during spring and summer; they are considered an expression of the negative impacts of high water levels and moist peat soils on root development. Some unusually old bog pines - exhibiting >500 growth rings - apparently colonized the site at the beginning of the Little Ice Age, and therefore seem to confirm that (i) peat conditions may have been drier in Siberia than in most other regions of western Europe during this period. At the same time, the bog trees also point to (ii) their strong dependence on surface conditions. (C) 2016 Elsevier B.V. All rights reserved.

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Type
research article
DOI
10.1016/j.scitotenv.2016.06.225
Web of Science ID

WOS:000389090100111

Author(s)
Blanchet, Guillaume
Guillet, Sebastien
Calliari, Baptiste
Corona, Christophe
Edvardsson, Johannes
Stoffel, Markus
Bragazza, Luca  
Date Issued

2017

Publisher

Elsevier Science Bv

Published in
Science Of The Total Environment
Volume

574

Start page

1209

End page

1216

Subjects

Dendroclimatology

•

Peatland

•

3-month SPEI

•

PDSI

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
ECOS  
Available on Infoscience
January 24, 2017
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/133495
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