Comparison of δ 18 O and δ 13 C values between tree-ring whole wood and cellulose in five species growing under two different site conditions

摘要: RATIONALE We investigated the applicability of tree-ring whole-wood material for δ(18)O and δ(13)C analysis in comparison with more time- resource-intensive use cellulose, by considering possible variability between (i) five different tree species (Fagus sylvatica, Quercus robur, Picea abies, Abies alba, Pseudotsuga menziesii), (ii) two sites that differ soil moisture, (iii) climate conditions within a 10-year period. METHODS Stem cores 30 individual trees (n = 3 per each site) were sampled from south Germany (Bavaria), rings sapwood years 2001-2010 separated. The values homogenized whole wood extracted cellulose measured mass spectrometry. Species-specific offsets isotope analyzed responses isotopic signature to including single drought event compared cellulose. RESULTS A constant offset ca 5‰ was observed most independent site conditions, significant difference beech Douglas-fir, while inter-annual only oak. ranged 1.45 1.84‰ across species, years. Both materials generally showed similar strength temperature, precipitation water availability, particularly conifers. Resistance severe stress--partly strongly reflected cellulose--was lower conifers than deciduous species. CONCLUSIONS Wood studied is as useful studying environmental effects on at short-term scale considered ecophysiological studies. variable response oak may require further investigations.