EcolChange seminar on 2nd of March – Arne Sellin talks about the effect of air humidity on tree growth

Seminar of the Centre of Excellence EcolChange

Docent of plant ecophysiology and the head of the chair of ecophysiology at the Department of Botany, University of Tartu, Arne Sellin, will give a talk titled:

Growth of northern deciduous trees under increasing atmospheric humidity: possible mechanisms behind the growth retardation

Time: Thursday, 2nd. March 2017 at 15.15

Place: Tartu, Lai 40-218 (Vaga auditorium)


Arne Sellin


The growth reduction in response to increasing air humidity appears to be species specific, with larger reductions for hybrid aspen than for silver birch. The impact of elevated humidity on tree functioning is complex; there is no certain single mechanism behind the growth retardation. The magnitude of the effects and dominating mechanism depend on particular conditions (and thus on other environmental drivers), especially weather conditions prevailing during the growing period. The expected climate-change-induced increase in the growth rate of trees in northern temperate and boreal areas due to an earlier start of the growing season and higher carbon assimilation rate could be smaller or absent if temperature rise is accompanied by a rise in atmospheric humidity.

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