Fir Decline and Mortality in the Southern Siberian Mountains
URI (for links/citations):https://link.springer.com/article/10.1007/s10113-016-1073-5
Viacheslav I. Kharuk
Sergei T. Im
Ilya A. Petrov
Mariya L. Dvinskaya
Elena V. Fedotova
Kenneth J. Ranson
Институт космических и информационных технологий
Институт экологии и географии
Базовая кафедра геоинформационных систем
Journal Name:Regional Environmental Change
Journal Quartile in Scopus:Q2
Journal Quartile in Web of Science:Q1
Bibliographic Citation:Viacheslav I. Kharuk. Fir Decline and Mortality in the Southern Siberian Mountains [Текст] / Viacheslav I. Kharuk, Sergei T. Im, Ilya A. Petrov, Mariya L. Dvinskaya, Elena V. Fedotova, Kenneth J. Ranson // Regional Environmental Change. — 2017. — Т. 17 (№ 3). — С. 803-812
Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала.
Increased dieback and mortality of ‘‘dark needle conifer’’ (DNC) stands (composed of ﬁr (Abies sibirica), Siberian pine (Pinus sibirica) and spruce (Picea obovata)) were documented in Russia during recent decades. Here we analyzed spatial and temporal patterns of ﬁr decline and mortality in the southern Siberian Mountains based on satellite, in situ and dendrochronological data. The studied stands are located within the boundary between DNC taiga to the north and forest-steppe to the south. Fir decline and mortality were observed to originate where topographic features contributed to maximal water-stress risk, i.e., steep (18–25deg), convex, south-facing slopes with a shallow well-drained root zone. Fir regeneration survived droughts and increased stem radial growth, while upper canopy trees died. Tree ring width (TRW) growth negatively correlated with vapor pressure deﬁcit(VPD), drought index and occurrence of late frosts, and positively with soil water content. Previous year growth conditions (i.e., drought index, VPD, soil water anomalies) have a high impact on current TRW (r = 0.60–0.74). Fir mortality was induced by increased water stress and severe droughts (as a primary factor) in synergy with bark-beetles and fungi attacks (as secondary factors). Dendrochronology data indicated that ﬁr mortality is a periodic process. In a future climate with increased aridity and drought frequency, ﬁr (and Siberian pine) may disappear from portions of its current range (primarily within the boundary with the forest steppe) and is likely to be replaced by drought-tolerant species such as Pinus sylvestris and Larix sibirica.
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