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Climate-Induced Mortality of Siberian Pine and Fir in the Lake Baikal Watershed, SiberiaSiberian pine (Pinus sibirica) and fir (Abies sibirica) (so called ''dark needle conifers", DNC) showed decreased radial growth increment within the Lake Baikal watershed since the 1980s with increasing mortality recorded since the year 2000. Tree ring width was strongly correlated with vapor pressure deficit, aridity and root zone moisture. Water stress from droughts made trees more susceptible to insect attacks causing mortality in about 10% of DNC stands within the Lake Baikal watershed. Within Siberia DNC mortality increased in the southern part of the DNC range. Biogeographically, tree mortality was located within the DNC - forest-steppes transition. Tree mortality was significantly correlated with drought and soil moisture anomalies. Within the interior of the DNC range mortality occurred within relief features with high water stress risk (i.e., steep convex south facing slopes with shallow well-drained soils). In general, DNC mortality in Siberia was induced by increased aridity and severe drought (inciting factors) in synergy with biotic attacks (contributing factor). In future climate scenarios with predicted increase in aridity DNC could be eliminated from the southern part of its current range and will be replaced by drought-resistant conifers and broadleaf species (e.g., Larix sibirica, Pinus silvestris, and Betula pubescence).
Document ID
20170000254
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Kharuk, Viacheslav I.
(Sukachev Institute of Forest Krasnoyarsk, Russia)
Im, Sergei T.
(Sukachev Institute of Forest Krasnoyarsk, Russia)
Petrov, Ilya A.
(Sukachev Institute of Forest Krasnoyarsk, Russia)
Golyukov, Alexei S.
(Sukachev Institute of Forest Krasnoyarsk, Russia)
Ranson, Kenneth J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Yagunov, Mikhail N.
(Russian Ctr. of Forest Protection Krasnoyarsk, Russia)
Date Acquired
January 4, 2017
Publication Date
October 27, 2016
Publication Information
Publication: Forest Ecology and Management
Publisher: Elsevier B.V.
Volume: 384
Subject Category
Meteorology And Climatology
Report/Patent Number
GSFC-E-DAA-TN37512
Funding Number(s)
CONTRACT_GRANT: NNG11HP16A
Distribution Limits
Public
Copyright
Other
Keywords
Conifer Mortality
Drought
Water Stress

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