Savchuk Institute of Monitoring of Climatic and Ecological Systems SB RAS 10/3 Academichesky prospekt, Tomsk, 634055, Russia Received 15.04.2015, received in revised form 17.06.2015, accepted 29.08.2015 Age structure of forests and radial increment of conifers were studied in the “forest–steppe” contact zone: Siberian stone pine–Siberian spruce–Siberian larch forest in the lower belt of Severo-Chuisky Range, Siberian larch–Siberian spruce–Siberian stone pine forest at the forest-steppe boundary and Siberian larch forests in the forest-steppe ecotone in Kuraiskaya steppe (the Altai Mountains). <...> The structure of the coniferous forests is complex with three generations along the transect: the lower forest belt –> forest-steppe boundary –> forest-steppe ecotone. <...> Percentage of larch trees increases from the forest belt to the steppe. <...> The larch tree ring width chronologies are synchronous but different by their amplitudes. <...> In the modern warming period the radial increment of larch limits by precipitation defi cit and high air temperature during the vegetation period at the forest-steppe boundary. <...> All rights reserved * Corresponding author E-mail address: bochar74@mail.ru # 426 # Anatoly Yu. <...> Structure of Forests and Climatic Response of Trees in “Forest-Steppe”… <...> Структура лесов и климатический отклик деревьев в зоне контакта «лес-степь» (Горный Алтай) А.Ю. Бочаров, Д.А. Савчук Институт мониторинга климатических и экологических систем СО РАН Россия, 634055, Томск, пр. <...> Академический, 10/3 Изучение радиального прироста деревьев и возрастного строения лесов позволяет проследить формирование лесных экосистем, охарактеризовать темпы и особенности их развития в условиях изменений климата. <...> Исследования возрастной структуры лесов и климатически обусловленной изменчивости радиального прироста хвойных деревьев проводились в зоне контакта «лес-степь» на северном макросклоне Северо-Чуйского хребта и Курайской степи (Горный <...>