Tree and stand growth of mature Norway spruce and European beech under long-term ozone fumigation |
| |
Authors: | Hans Pretzsch Jochen Dieler Philip Wipfler |
| |
Institution: | a Chair for Forest Growth and Yield Science, Technische Universität München, Am Hochanger 13, D-85354 Freising, Germany b Chair for Ecophysiology of Plants, Technische Universität München, Am Hochanger 13, D-85354 Freising, Germany |
| |
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. |
| |
Keywords: | Free-air ozone fumigation Stress response Shoot allometry Stem form factor Tree height growth Stem diameter growth Volume growth |
本文献已被 ScienceDirect 等数据库收录! |
|