Abstract
In a 50- to 70-year-old mixed stand of Norway spruce (Picea abies (L.) Karst.) and European beech (Fagus sylvatica L.) in Germany, tree cohorts have been exposed to double ambient ozone (2×O3) from 2000 through 2007 and can be compared with trees in the same stand under the ambient ozone regime (1×O3). Annual diameter growth, allocation pattern, stem form, and stem volume were quantified at the individual tree and stand level. Ozone fumigation induced a shift in the resource allocation into height growth at the expense of diameter growth. This change in allometry leads to rather cone-shaped stem forms and reduced stem stability in the case of spruce, and even neiloidal stem shapes in the case of beech. Neglect of such ozone-induced changes in stem shape may lead to a flawed estimation of volume growth. On the stand level, 2×O3 caused, on average, a decrease of 10.2 m3 ha-1 yr-1 in European beech.
Original language | English |
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Pages (from-to) | 1061-1070 |
Number of pages | 10 |
Journal | Environmental Pollution |
Volume | 158 |
Issue number | 4 |
DOIs | |
State | Published - Apr 2010 |
Keywords
- Free-air ozone fumigation
- Shoot allometry
- Stem diameter growth
- Stem form factor
- Stress response
- Tree height growth
- Volume growth