A series of dates of unfolding of the first leaves and duration of the season of vegetation in the silver birch (Betula pendula Roth. (B. verrucosa Ehrh.)), as well as the duration of flowering of the bird cherry (Padus avium), mountain ash (Sórbus aucupária), and small-leaved lime (Tilia cordata Mill.) for the period 1970–2010 in the central part of European Russia were studied in order to assess the trends. Differences in phenological responses to homogeneous climate changes in the trees of the same species from the northern and southern parts of the range were revealed. If spring events occur 3–7 days earlier in the northern part, no such effect is observed in the south. This fact can be interpreted as a manifestation of the different mechanisms of homeostasis in different populations determined by their biological characteristics (in particular, by the need to pass successfully the periods of organic rest and vegetation).
Russian Journal of Developmental Biology – Springer Journals
Published: May 23, 2014
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