The response of delta C-13, delta O-18 and cell anatomy of Larix gmelinii tree rings to differing soil active layer depths

Тип публикации: статья из журнала

Год издания: 2015

Идентификатор DOI: 10.1016/j.dendro.2015.05.002

Ключевые слова: Central Siberia, Permafrost, Thermo-hydrological regime of soils, Tree-ring width, Quantitative wood anatomy, Stable C and O isotopes, active layer, anatomy, biological production, carbon isotope, coniferous tree, cytology, global warming, ground cover, growth rate, hydrological regime, oxygen isotope, soil depth, thermal regime, tree ring, Siberia, Larix gmelinii

Аннотация: Global warming is most pronounced in high-latitude regions by altering habitat conditions and affecting permafrost degradation, which may significantly influence tree productivity and vegetation changes. In this study, by applying a "space-for-time" approach, we selected three plots of Larix gmelinii forest from a continuous permafrost zone in Siberia with different thermo-hydrological soil regimes and ground cover vegetation with the objective of assessing how tree growth and productivity will change under different stages of permafrost degradation. A tree-ring multi-proxy characterization of mature trees was used to identify shift in ecophysiological responses related to the modified plant-soil system. Variability of tree-ring width (1975-2009), stable isotope ratios (oxygen and carbon, 2000-2009) and xylem structural characteristics (2000-2009) under climatic conditions of particular years indicated that an increased depth of the soil active layer will initially lead to increase of tree productivity. However, due to an expected water use increase through transpiration, the system might progressively shift from a temperature to a moisture-limited environment. (C) 2015 Elsevier GmbH. All rights reserved.

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Издание

Журнал: DENDROCHRONOLOGIA

Выпуск журнала: Vol. 34

Номера страниц: 51-59

ISSN журнала: 11257865

Место издания: JENA

Издатель: ELSEVIER GMBH, URBAN & FISCHER VERLAG

Авторы

  • Bryukhanova M.V. (V.N. Sukachev Institute of Forest SB RAS)
  • Kirdyanov A.V. (V.N. Sukachev Institute of Forest SB RAS)
  • Prokushkin A.S. (V.N. Sukachev Institute of Forest SB RAS)
  • Fonti P. (WSL Swiss Federal Research Institute)
  • Siegwolf R.T.W. (Paul Scherrer Institute)
  • Saurer M. (Paul Scherrer Institute)
  • Churakova Sidorova O.V. (ETH Zurich, Institute of Terrestrial Ecosystems)
  • Pochebyt N.P. (Siberian Federal University)

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