Siberian Pine and Larch Response to Climate Warming in the Southern Siberian Mountain Forest: Tundra Ecotone : научное издание

Kharuk V.I.; Dvinskaya M.L.; Im S.T.; Ranson K.J.

Дополнительные ссылки: РИНЦ

База данных: Каталог библиотеки СФУ

Библиографическое описание: Siberian Pine and Larch Response to Climate Warming in the Southern Siberian Mountain Forest: Tundra Ecotone : научное издание / V. I. Kharuk [et al.]. - Текст : непосредственный // Advances in Global Change Research (см. в книгах). - 2010. - Т. 40, № . - P. 115-132. - ISSN 1574-0919, DOI 10.1007/978-90-481-8641-9_8.

Аннотация: The tree response to climate trends is most likely observable in the forest-tundra ecotone, where temperature limits tree growth. Here we show that trees in the forest-tundra ecotone of the mid of the south Siberian Mountains responded strongly to warmer temperatures during the past two decades. There was a growth increment increase, stand densification, regeneration propagation into the alpine tundra, and transformation of prostrate Siberian pine, larch and fir into arboreal forms. A temperature increase of 1°C allows regeneration to occupy areas ~40–100 m higher in elevation, depending on the site. Siberian pine and larch regeneration and arboreal forms now occur at elevations up to 200 m higher in comparison with the known location of the former tree line. These species surpass their upper historical boundary of 10–80 m elevation. Regeneration is propagating into the alpine tundra with the rate of 0.5–2.0 m/year. The observed winter temperature increase is significant for regeneration survival. Measurements of the radial and apical growth increments indicates an acceleration of krummholz transforming into arboreal forms in the mid-1980s. Larch surpasses Siberian pine in cold resistance, and has an arboreal growth form where Siberian pine is in krummholz form. Improving climate provides competitive advantages to Siberian pine in the areas with sufficient precipitation amount. Larch, as a leader in harsh environment resistance, received an advantage at the upper front tree line, and in the areas with low precipitation. Observed tree migration into the alpine stony tundra will decrease albedo, providing a positive feedback to global warming at the regional level.

Год издания: 2010

Авторы: Kharuk V.I. , Dvinskaya M.L. , Im S.T. , Ranson K.J.

Источник: Advances in Global Change Research (см. в книгах)

Выпуск: Т. 40

Номера страниц: 115-132

Держатель оригинала документа: NASA Goddard Space Flight Center, V.N. Sukachev Institute of Forest,SB RAS

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