title: Comparison of δ(13)C and δ(18)O from cellulose, whole wood, and resin-free whole wood from an old high elevation Pinus uncinata in the Spanish central Pyrenees.
abstract: δ(13)C and δ(18)O values from sapwood of a single Pinus uncinata tree, from a high elevation site in the Spanish Pyrenees, were determined to evaluate the differences between whole wood and resin-free whole wood. This issue is addressed for the first time with P. uncinata over a 38-year long period. Results are also compared with published isotope values of α-cellulose samples from the same tree. The differences in δ(13)C and δ(18)O between whole wood and resin-free whole wood vary within the analytical uncertainty of 0.3 and 0.5 ‰, respectively, indicating that resin extraction is not necessary for sapwood of P. uncinata. Mean differences between cellulose and whole wood are 0.9 ‰ (δ(13)C) and 5.0 ‰ (δ(18)O), respectively. However, further analyses of different species and other sites are needed to evaluate whether the findings reported here are coherent more generally.
authors.affiliation: a Institute of Geography, Johannes Gutenberg-University Mainz , Mainz , Germany.|b Institute of Geosciences, Johannes Gutenberg-University Mainz , Mainz , Germany.
authors.forename: Dana F C
authors.initials: DF
authors.lastname: Riechelmann
authors.affiliation: b Institute of Geosciences, Johannes Gutenberg-University Mainz , Mainz , Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Maus
authors.affiliation: c Institute of Organic Chemistry, Johannes Gutenberg-University Mainz , Mainz , Germany.
authors.forename: Willi
authors.initials: W
authors.lastname: Dindorf
authors.affiliation: a Institute of Geography, Johannes Gutenberg-University Mainz , Mainz , Germany.
authors.forename: Oliver
authors.initials: O
authors.lastname: Konter
authors.affiliation: b Institute of Geosciences, Johannes Gutenberg-University Mainz , Mainz , Germany.
authors.forename: Bernd R
authors.initials: BR
authors.lastname: Schöne
authors.affiliation: a Institute of Geography, Johannes Gutenberg-University Mainz , Mainz , Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Esper
mesh_terms: D002247:Carbon Isotopes / Q000032:analysis*; D002482:Cellulose / Q000737:chemistry*; D010103:Oxygen Isotopes / Q000032:analysis*; D028223:Pinus; D013030:Spain; D014934:Wood / Q000737:chemistry*
chemical_list: D002247:Carbon Isotopes; D010103:Oxygen Isotopes; D002482:Cellulose
keywords: carbon-13; climate signals; oxygen-18; resin; sample preparation; tree-rings; wood; α-cellulose