Photosynthetic Rates of Beech Saplings Depending on Irradiance Level in the Understorey — Studies of Carbon Balance in a Montane Beech Forest (Fagus sylvatica L.) in the Solling Area, FRG.

Abstract

Investigations on forest ecosystems require detailed knowledge about the conditions that ensure tree seedlings and saplings to survive beneath forest shade. Light intensity incident on the forest floor under the canopy of a mature stand shows great temporal and spatial variations (1). The carbon budget of beech saplings (Fagus sylvatica L.) in the understorey of temperate deciduous forests depends mainly on the prevailing irradiance and governs allocation strategies and growth patterns (2).