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A cumulative ozone uptake-response relationship for the growth of Norway spruce saplings

Journal article
Authors Per Erik Karlsson
E. L. Medin
Susanne Ottosson
Gun Selldén
Göran Wallin
Håkan Pleijel
Lena Skärby
Published in Environmental Pollution
Volume 128
Issue 3
Pages 405-417
ISSN 0269-7491
Publication year 2004
Published at Botanical Institute, Plant Physiology
Department of Environmental Science and Conservation, Applied Environmental Science
Pages 405-417
Language en
Keywords ozone flux, CUO, biomass, relative growth rate, Picea abies, stomatal conductance, transpiration
Subject categories Botany, Terrestrial ecology


Norway spruce saplings [Picea abies (L.) Karst.] were exposed during four growing seasons to different ozone treatments in open-top chambers: charcoal filtered air (CF), non-filtered air (NF) and non-filtered air with extra ozone (NF+, 1.4xambient concentrations). The CF and NF + ozone treatments were combined with phosphorous deficiency and drought stress treatments. The total biomass of the trees was harvested at different intervals during the experimental period. The ozone uptake to current-year needles of the Norway spruce saplings was estimated using a multiplicative stomatal conductance simulation model. There was a highly significant correlation between the reduction of total biomass and the estimated cumulative ozone uptake, which did not vary when different thresholds were applied for the rate of ozone uptake. The reduction of the total biomass was estimated to 1 per 10 mmol m(-2) cumulated ozone uptake, on a projected needle area basis. (C) 2003 Elsevier Ltd. All rights reserved.

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