%0 Research article
%T Climate impact on 100-year foliage chronologies of Scots pine and Ponderosa pine in the northeast lowlands of Brandenburg, Germany
%A Insinna, Patrick
%A Jalkanen, Risto
%A Götz, Bernhard
%D 2007
%J Silva Fennica
%V 41
%N 4
%R doi:10.14214/sf.271
%U https://silvafennica.fi/article/271
%X Due to differences in the high-frequency signal and mean sensitivity of  needle parameters in Scots pine and Ponderosa pine revealed in previous  investigations, variance caused by climate factors at a dry site in the  northeast lowlands of Brandenburg was investigated. Although water is  the general limiting factor for both tree species, there are evident  differences in the climate-driven impact on individual needle  parameters. Autumn precipitation of the previous year was equally  important for Scots pine and Ponderosa pine, but summer precipitation  was more significant for the needle parameters of Scots pine. In  contrast to precipitation, temperature seems to have a minor impact on  needle parameters. Although January temperatures are significant  predictors for both species, intercorrelations between needle parameters  and summer temperatures were found only for Ponderosa pine. Striking  correlation was also found between sun activity and needle production in  Ponderosa pine, but not Scots pine, indicating possible adaptation to  solar radiation.