TRENDS IN ELEMENTAL CONCENTRATIONS OF TREE RINGS FROM THE SIBERIAN ARCTIC

Тип публикации: статья из журнала

Год издания: 2016

Идентификатор DOI: 10.3959/1536-1098-72.02.67

Ключевые слова: wood chemistry, dendrochemistry, Larix decidua, biogeochemical cycling, soil acidification, permafrost thawing, Arctic pollution, Norilsk Nickel smelting complex, ICP-MS, Arctic pollution, biogeochemical cycling, dendrochemistry, ICP-MS, Larix decidua, Norilsk Nickel smelting complex, permafrost thawing, soil acidification, Wood chemistry

Аннотация: The biogeochemistry and ecology of the Arctic environment have been heavily impacted by anthropogenic pollution and climate change. We used ICP-MS to measure concentrations of 26 elements in the AD 1300-2000 tree rings of larch from the Taymyr Peninsula in northern Siberia for studying the interaction between environmental change and wood chemistry. We applied a two-stage data reduction technique to identify trends in the noisy measurement data. Statistical assessment of variance of normalized time series reveals pronounced depletion of xylem Ca, Mg, Cl, Bi and Si concentrations and enrichment of P, K, Mn, Rb, Sr and Ba concentrations after ca. AD 1900. The trends are unprecedented in the 700-year records, but multiple mechanisms may be at work and difficult to attribute with certainty. The declining xylem Ca and Mg may be a response to soil acidification from air pollution, whereas increasing P, K, and Mn concentrations may signal changes in root efficiency and excess water-soluble minerals liberated by the permafrost thaw. The changes seem consistent with mounting stress on Arctic vegetation. This study supports the potential of tree rings for monitoring past and ongoing changes in biogeochemistry of Arctic ecosystems related to pollution and permafrost thaw.

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Издание

Журнал: TREE-RING RESEARCH

Выпуск журнала: Vol. 72, Is. 2

Номера страниц: 67-77

ISSN журнала: 15361098

Место издания: TUCSON

Издатель: TREE-RING SOC

Авторы

  • Panyushkina I.P. (Laboratory of Tree-Ring Research,University of Arizona)
  • Zhuchenko N.A. (Limnological Institute SB RAS)
  • Leavitt S.W. (Laboratory of Tree-Ring Research,University of Arizona)
  • Hughes M.K. (Laboratory of Tree-Ring Research,University of Arizona)
  • Shishov V.V. (Siberian Federal University)
  • Kirdyanov A.V. (Sukachev Institute of Forest SB RAS,Akademgorodok)
  • Vaganov E.A. (Sukachev Institute of Forest SB RAS,Akademgorodok)
  • Grachev A.M. (Institute of Geography)
  • Knorre A.A. (Sukachev Institute of Forest SB RAS,Akademgorodok)
  • Chebykin E.P. (Limnological Institute SB RAS)

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