Standardsignatur
Titel
Advances in understanding ozone impact on forest trees: Messages from novel phytotron and free-air fumigation studies
Verfasser
Rainer Matyssek (*)
David F. Karnosky
Gerhard Wieser
K. Percy
E. Oksanen
Thorsten E.E. Grams
M. Kubiske
David E. Hanke
Hans Pretzsch
Erscheinungsort
Amsterdam
Verlag
Elsevier
Erscheinungsjahr
2010
Seiten
S. 1990-2006
Material
SonderdruckBandaufführung
Datensatznummer
167328
Quelle
Environmental Pollution, S. 1990-2006
Abstract
Recent evidence from novel phytotron and free-air ozone (O3) fumigation experiments in Europe and America on forest tree species is highlighted in relation to previous chamber studies. Differences in O3 sensitivity between pioneer and climax species are examined and viewed for trees growing at the harsh alpine timberline ecotone. As O3 apparently counteracts positive effects of elevated CO2 and mitigates productivity increases, response is governed by genotype, competitors, and ontogeny rather than species per se. Complexity in O3 responsiveness increased under the influence of pathogens and herbivores. The new evidence does not conflict in principle with previous findings that, however, pointed to a low ecological significance. This new knowledge on treesę O3 responsiveness beyond the juvenile stage in plantations and forests nevertheless implies limited predictability due to complexity in biotic and abiotic interactions. Unravelling underlying mechanisms is mandatory for assessing O3 risks as an important component of climate change scenarios.