Warming Effects on Pinus sylvestris in the Cold-Dry Siberian Forest-Steppe: Positive or Negative Balance of Trade? : сборник научных трудов

Тип публикации: статья из журнала

Год издания: 2017

Идентификатор DOI: 10.3390/f8120490

Ключевые слова: climate warming, dendroecology, drought stress, forest-steppe, Scots pine, Central Siberia, stable isotopes, tree rings

Аннотация: Understanding climate change impacts on drought-prone forests is a critical issue. We investigated ring-width and stable isotopes (C-13 and O-18) in two Pinus sylvestris stands of the cold-dry Siberian forest-steppe growing under contrasting climatic trends over the last 75 years. Despite regional warming, there was increasing precipitation during the growing period at the southern site (MIN) but increasing water deficit (WD) at the northern site (BER). Intrinsic water use efficiency (WUEi) increased similarly (ca. 22%) in response to warming and rising atmospheric CO2. However, the steady increase in WUEi was accompanied by divergent growth patterns since 1980: increasing basal area increment (BAI) in MIN (slope = 0.102 cm(2) year(-2)) and decreasing BAI in BER (slope = -0.129 cm(2) year(-2)). This suggests that increased precipitation, mediated by CO2 effects, promoted growth in MIN, whereas intensified drought stress led to decreased carbon gain and productivity in BER. When compared to warm-dry stands of eastern Spain, the WUEi dependence on WD was three-fold greater in Siberia. Conversely, BAI was more affected by the relative impact of water stress within each region. These results indicate contrasting future trajectories of P. sylvestris forests, which challenge forecasting growth and carbon sequestration in cold-dry areas.

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Издание

Журнал: FORESTS

Выпуск журнала: Vol. 8, Is. 12

Номера страниц: 490

ISSN журнала: 19994907

Место издания: BASEL

Издатель: MDPI AG

Авторы

  • Shestakova Tatiana A. (Univ Lleida, Dept Crop & Forest Sci, AGROTECNIO Ctr, Avda Rovira Roure 191, Lleida 25198, Spain; Siberian Fed Univ, Math Methods & IT Dept, St L Prushinskoy 2, Krasnoyarsk 660075, Russia)
  • Voltas Jordi (Univ Lleida, Dept Crop & Forest Sci, AGROTECNIO Ctr, Avda Rovira Roure 191, Lleida 25198, Spain)
  • Saurer Matthias (Swiss Fed Inst Forest Snow & Landscape Res WSL, Zurcherstr 111, CH-8903 Birmensdorf, Switzerland)
  • Siegwolf Rolf T. W. (PSI, Lab Atmospher Chem, CH-5232 Villigen, Switzerland)
  • Kirdyanov Alexander V. (Sukachev Inst Forest, Akademgorodok 50-28, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Inst Ecol & Geog, Pr Svobodny 82, Krasnoyarsk 660041, Russia)

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