Effects of temperature and precipitation on radial growth of Siberian larch in ecotopes with optimal, insufficient, and excessive soil moistening

Велисевич, С. Н.; Kozlov, D. S.

doi:10.1134/s1067413606040047

Cited by 18 publications

(2 citation statements)

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“…These results also highlight the important effect of environmental conditions before, and at the very beginning of, the growing season on tree growth and vegetation activity in hemi-boreal forests. Previous studies corroborate this conclusion and have shown that tree growth for L. sibirica in this region is mainly controlled by the precipitation received early in the growing season [27] .…”

Section: Discussionsupporting

confidence: 68%

Growth Decline Linked to Warming-Induced Water Limitation in Hemi-Boreal Forests

Liu

Guo

et al. 2012

PLoS ONE

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Hemi-boreal forests, which make up the transition from temperate deciduous forests to boreal forests in southern Siberia, have experienced significant warming without any accompanying increase in precipitation during the last 80 years. This climatic change could have a profound impact on tree growth and on the stability of forest ecosystems in this region, but at present evidence for these impacts is lacking. In this study, we report a recent dramatic decline in the growth of hemi-boreal forests, based on ring width measurements from three dominant tree-species (Pinus sylvestris, Larix sibirica and Larix gmelinii), sampled from eight sites in the region. We found that regional tree growth has become increasingly limited by low soil water content in the pre- and early-growing season (from October of the previous year to July of the current year) over the past 80 years. A warming-induced reduction in soil water content has also increased the climate sensitivity of these three tree species. Beginning in the mid-1980s, a clear decline in growth is evident for both the pine forests and the larch forests, although there are increasing trends in the proxy of soil water use efficiencies. Our findings are consistent with those from other parts of the world and provide valuable insights into the regional carbon cycle and vegetation dynamics, and should be useful for devising adaptive forest management strategies.

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Section: Discussionsupporting

confidence: 68%

Growth Decline Linked to Warming-Induced Water Limitation in Hemi-Boreal Forests

Liu

Guo

et al. 2012

PLoS ONE

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“…In contrast to alpine forest lines where trees benefit from global warming because their growth is limited by low temperatures (Jacoby et al , 1996; Moiseev, 2002; Yu et al , 2005), Siberian larch at the lower forest line to the steppe is likely to be negatively affected by increasing aridity. A marked response of larch to precipitation has already been shown for other forests in Eurasia in non‐tree line situations (Oleksyn & Fritts, 1991; Velisevich & Kozlov, 2006). Far from the forest line, changes in growth due to changes in precipitation can at most cause shifts in the tree‐species composition of forests (Tchebakova et al , 2005), whereas at the geographical drought limit of forests, as in the western Khentey, reduced growth and regeneration are likely to cause a retreat of the forest.…”

Section: Discussionmentioning

confidence: 62%

Recent drought stress leads to growth reductions in Larix sibirica in the western Khentey, Mongolia

Dulamsuren

Hauck

Leuschner

2009

Global Change Biology

124

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Trends in air temperature and precipitation in the forest-steppe ecotone of the western Khentey, northern Mongolia were studied and related to stem increment and shoot water relations in Mongolia's most common tree species, Siberian larch (Larix sibirica). The area has been subject to a significant increase of summer temperature and a decrease of summer precipitation during the last 47 years. Tree-ring width series from 4400 larch trees show a strongly decreasing annual increment since the 1940s. The onset of this decrease is independent of the age of the trees and, therefore, can be attributed to the increasing aridity in the 20th century. Simultaneously to the declining annual increment, regeneration of Siberian larch decreased as well; today regeneration is virtually lacking in the larch forests on mountain slopes of the western Khentey. Measurements of shoot water potentials during the growing season exhibited daily minimum water potentials close to the point of zero turgor for extended periods. The drought stress indicated by these results is in line with the current low annual increment. Trees in the forest interior were more severely stressed and grow more slowly than trees at the forest line to steppe. This is attributable to the recent increase in aridity, as the stand density and probably also the trees themselves in the forest interior are adapted to moister conditions, whereas the trees at the forest edge have always been exposed to a more extreme microclimate. The progressing increase in aridity during the 21st century that is predicted for the western Khentey, suggests a future decline of larch forests. A widespread increase of aridity predicted for most parts of the Mongolian forest belt, suggests even a supra-regional decline of larch.

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Boreale Wälder und Moorgebiete

Hauck

Leuschner

Homeier

2019

Klimawandel Und Vegetation - Eine Globale Übersicht

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Effects of temperature and precipitation on radial growth of Siberian larch in ecotopes with optimal, insufficient, and excessive soil moistening

Cited by 18 publications

References 1 publication

Growth Decline Linked to Warming-Induced Water Limitation in Hemi-Boreal Forests

Growth Decline Linked to Warming-Induced Water Limitation in Hemi-Boreal Forests

Recent drought stress leads to growth reductions in Larix sibirica in the western Khentey, Mongolia

Boreale Wälder und Moorgebiete

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