TY  - JOUR
A1  - Eghdami, Hanieh
A1  - Werner, Willy
A1  - De Marco, Alessandra
A1  - Sicard, Pierre
T1  - Influence of Ozone and Drought on Tree Growth under Field Conditions in a 22 Year Time Series
T2  - Forests
N2  - Studying the effect of surface ozone (O3) 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 O3 fluxes (PODY) with an hourly threshold of uptake (Y) to represent the detoxification capacity of trees (POD1, with Y = 1 nmol O3 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 cm2 per year, p < 0.05). A random forest analysis showed that the soil water content and daytime O3 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 O3 pollution mostly influence tree growth decline for European beech and Norway spruce.
KW  - basal area increment
KW  - fructification
KW  - ozone
KW  - soil water content
KW  - forest
KW  - drought
KW  - Rheinland-Pfalz
KW  - Forstlicher Standort
KW  - Trockenheit
KW  - Ozonbelastung
KW  - Pflanzenwachstum
KW  - Fruchtbildung
Y1  - 2022
UR  - https://ubt.opus.hbz-nrw.de/frontdoor/index/index/docId/2019
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:385-1-20194
VL  - 2022
IS  - Band 13, Heft 8 (2022)
PB  - MDPI
CY  - Basel
ER  -