Assessment of Stand History Using Lignin Phenols and Cutin- and Suberin-Derived Aliphatic Monomers as Biomarkers.

Each tree species has a unique chemical composition, and also the various tree tissues differ from one another in their chemistry. These different compositions can be traced back after decay of the trees when they are transformed into soil organic matter (SOM). Thus biomarkers in soils which can be attributed to a specific tree species and their stage of alteration can provide insight into stand history, SOM source and turnover. We used copper (II) oxide (CuO) oxidation and subsequent analysis by gas chromatography/mass spectrometry (GC/ MS) of leaves/needles and root material of four silvicultural relevant tree species (Norway spruce, Douglas fir, beech, and oak) and forest floor material to release lignin phenols and cutin- and suberin-derived aliphatic monomers. The object of the study was to examine the applicability of these compounds in soil as biomarkers for these different tree species. It appeared that the forest floor contained all lignin phenols and cutin- and suberin-derived aliphatic monomers and those can be attributed doubtless to the respective tree species.