Home – Home – Jornals – Contemporary Problems of Ecology 2021 number 5

Data on the seasonal development of 78 species of perennial plants in the Western Siberia forest-steppe due to changes in the regional climate are summarized over a 20-year period 1996-2015. It is shown that the meteorological indicators of the warm season in Novosibirsk have undergone noticeable changes: the average daily air temperature has increased by 0.16 °C, the growing season has extended by 12 days, and the period of active vegetation of plants at temperatures above 10 °C - by 8 days. Correlations of the dates of regrowth and flowering in perennials with the date of snowfall, the dates when the average daily air temperatures exceed 5 °C and 10 °C, and the sums of these temperatures were revealed. Using linear phenological trends, a delay within 2-6 days of the spring regrowth and an advance in the flowering by 2-10 days, except for early summer species, were established. A reduction of the prefloral period duration from 5 to 24 days indicated an acceleration in the rate of seasonal development in perennials against the background of the identified meteorological trends. The change in the duration of vegetation period was significant in spring-summer-fall green species and spring-summer-winter green species - 10 and 12 days, respectively. Low values of the coefficient of determination for most of the trends R ² < 0.06 showed changes in the phenology were mainly due to interannual variability.