Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.1007/s11629-021-6876-2

Ключевые слова: alpine biomes, treeline shift rate, treeline ecotone, siberian mountain forests, betula tortuosa, forest densification, tree clustering

Аннотация: Birch (Betula tortuosa) is one of the treeline forming species within the Siberian Mountains. We analysed the area dynamics of birch stands and the upslope climb of birch treeline based on the Landsat time series scenes and on-ground data. We found that since the warming onset (1970(th)) birch area increased by 10%, birch stands and treeline boundary were moving upslope with a rate of 1.4 m/yr and 4.0 m/yr. Birch upslope shift correlated with air temperatures at the beginning (May-June) and the end (August-October) of the growth period. Meanwhile, no correlation was found between birch upslope migration and precipitation. Winds negatively influenced both birch area growth and birch upslope climb during spring, fall, and wintertime. In the windy habitats, birch, together with larch and Siberian pine, formed clusters (hedges) which mitigated the influence of adverse winds. These clusters are the adaptive pattern for trees' upslope climb within windward slopes. The other adaptation to the harsh alpine ecotone habitat is non-leaf (bark) photosynthesis which supports tree survival. Thereby, Betula tortuosa upslope climb depends on the wind impact and warming in spring and fall that extended growth period. With ongoing warming and observed wind speed decrease on the background of sufficient precipitation, it is expected to further birch advance into alpine tundra in the Siberian Mountains.

Журнал: JOURNAL OF MOUNTAIN SCIENCE

Выпуск журнала: Vol. 18, Is. 12

Номера страниц: 3099-3108

ISSN журнала: 16726316

Место издания: BEIJING

Издатель: SCIENCE PRESS

• Kharuk Viacheslav I. (Russian Acad Sci, Sukachev Inst Forest, Fed Sci Ctr, Siberian Branch, Academgorodok 50-28, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Svobodny Str 79, Krasnoyarsk 660041, Russia)
• Im Sergei T. (Russian Acad Sci, Sukachev Inst Forest, Fed Sci Ctr, Siberian Branch, Academgorodok 50-28, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Svobodny Str 79, Krasnoyarsk 660041, Russia; Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsky Rabochy Str 31, Krasnoyarsk 660014, Russia)
• Petrov Il'ya A. (Russian Acad Sci, Sukachev Inst Forest, Fed Sci Ctr, Siberian Branch, Academgorodok 50-28, Krasnoyarsk 660036, Russia)

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