Photosynthetic Pigments in Siberian Pine and Fir under Climate Warming and Shift of the Timberline

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.3390/f11010063

Ключевые слова: Abies sibirica, Carotenoids, Chlorophyll, Climate change, Higher altitude, Pinus sibirica, Timberline

Аннотация: Research Highlights: For the first time, the Pinus sibirica Du Tour and Abies sibirica L. conifer forest at theWest Sayan ridge timberline has been explored to reveal which species is likely to react to climate change and a shift of the timberline. Such a shift may modify the ecological functions of the forests. Background and Objectives: Long-term climate change has become obvious in the mountains of southern Siberia. Specifically, a half-century rise in annual mean temperatures has been observed, while precipitation remains unchanged. Trees growing at the timberline are likely to strongly react to climate alterations. The objective was to estimate which of the two species sharing the same habitat would benefit from climate alteration and shifting of the timberline. Materials and Methods: At several altitudes (from 1413 to 1724 m a.s.l.), samples of P. sibirica and A. sibirica needles have been collected and contents of chlorophyll a and b as well as carotenoids were measured in June 2019. The temperature of needles of the two species was measured in both cloudy and sunny weather conditions. Results: The studied species have been shown to have dierent patterns of pigment variations with the growth of altitude. The decline of chlorophylls and carotenoids was more pronounced in P. sibirica (ratio at timberline ca. 2.2) than in A. sibirica (ratio ca. 3.1). Accordingly, the electron transport rate decreased more strongly in P. sibirica at the timberline (ca. 37.2 μmol of electrons/m-2 s-1) than in A. sibirica (56.9 μmol of electrons/m-2 s-1). The temperatures of needles in both cloudy and sunny weather were higher in A. sibirica (10.5 and 43.3 °C, respectively) than in P. sibirica (3.8 and 24.2 °C, respectively). Conclusions: The considered physiological and ecological traits show that P. sibirica is better protected from higher-altitude hazards (excess insolation, rise of temperature etc.) than A. sibirica. P. sibirica may be therefore a more likely winner than A. sibirica in the movement of the mountain timberline under climate warming in the area. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

Ссылки на полный текст

Издание

Журнал: Forests

Выпуск журнала: Vol. 11, Is. 1

Номера страниц: 63

ISSN журнала: 19994907

Издатель: MDPI AG

Авторы

  • Pakharkova Nina (Siberian Fed Univ, Chair Ecol & Nat Management, Svobodny Pr 79, Krasnoyarsk 660041, Russia)
  • Borisova Irina (Siberian Fed Univ, Chair Ecol & Nat Management, Svobodny Pr 79, Krasnoyarsk 660041, Russia)
  • Sharafutdinov Ruslan (Siberian Fed Univ, Chair Ecol & Nat Management, Svobodny Pr 79, Krasnoyarsk 660041, Russia)
  • Gavrikov Vladimir (Siberian Fed Univ, Chair Ecol & Nat Management, Svobodny Pr 79, Krasnoyarsk 660041, Russia)

Вхождение в базы данных

Информация о публикациях загружается с сайта службы поддержки публикационной активности СФУ. Сообщите, если заметили неточности.

Вы можете отметить интересные фрагменты текста, которые будут доступны по уникальной ссылке в адресной строке браузера.