Cone production of stone pines in the south of Western Siberia: the results of 30-year monitoring
S. N. GOROSHKEVICH, S. N. VELISEVICH, E. A. ZHUK, G. V. VASILYEVA
Institute of Monitoring of Climatic and Ecological Systems SB RAS, Tomsk, Russia
Keywords: stone pines, cone production, climate, ecotypes
Abstract
The structure of reproductive function in 4 species and many geographic ecotypes of stone pines was studied on natural and experimental (clone archive and test progenies) objects. In Siberian stone pine in the south of the forest zone in Western Siberia, the dynamics of cone production is determined by weather conditions in the year of pollination. Seed productivity is declining due to late spring frosts and higher temperatures in September. Over the past 30 years, the directional change of these factors has determined a significant decline in cone production. The productivity and stability of the species and geographic ecotypes of stone pines is determined by the correspondence of their need for warmth to the climate of the test site. Under the conditions of climate change, the local ecotype in terms of growth and cone production is often inferior to more thermophilic species and ecotypes.
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