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Influence of Ozone and Drought on Tree Growth under Field Conditions in a 22 Year Time Series
| Content Provider | MDPI |
|---|---|
| Author | Eghdami, Hanieh Werner, Willy Marco, Alessandra De Sicard, Pierre |
| Copyright Year | 2022 |
| Description | Studying the effect of surface ozone $(O_{3}$) and water stress on tree growth is important for planning sustainable forest management and forest ecology. In the present study, a 22-year long time series (1998–2019) on basal area increment (BAI) and fructification severity of European beech (Fagus sylvatica L.) and Norway spruce (Picea abies (L.) H.Karst.) at five forest sites in Western Germany (Rhineland Palatinate) was investigated to evaluate how it correlates with drought and stomatal $O_{3}$ fluxes (PODY) with an hourly threshold of uptake (Y) to represent the detoxification capacity of trees (POD1, with Y = 1 nmol $O_{3}$ $m^{−2}$ $s^{−1}$). Between 1998 and 2019, POD1 declined over time by on average 0.31 mmol $m^{−2}$ $year^{−1}$. The BAI showed no significant trend at all sites, except in Leisel where a slight decline was observed over time (−0.37 $cm^{2}$ per year, p < 0.05). A random forest analysis showed that the soil water content and daytime $O_{3}$ mean concentration were the best predictors of BAI at all sites. The highest mean score of fructification was observed during the dry years, while low level or no fructification was observed in most humid years. Combined effects of drought and $O_{3}$ pollution mostly influence tree growth decline for European beech and Norway spruce. |
| Starting Page | 1215 |
| e-ISSN | 19994907 |
| DOI | 10.3390/f13081215 |
| Journal | Forests |
| Issue Number | 8 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-08-02 |
| Access Restriction | Open |
| Subject Keyword | Forests Water Science and Technology Basal Area Increment Fructification Ozone Soil Water Content Forest Drought |
| Content Type | Text |
| Resource Type | Article |
