RT info:eu-repo/semantics/article T1 Variation in carbon concentration and basic density along stems of sessile oak (Quercus petraea (Matt.) Liebl.) and Pyrenean oak (Quercus pyrenaica Willd.) in the Cantabrian Range (NW Spain) A1 Castaño Santamaría, Javier A1 Bravo Oviedo, Felipe K1 Quercus-España-Cantabria AB ContextInformation about variations in basic density (BD) and carbon content (%C) along tree stems is key to assessing forest carbon sinks.AimsThe aim of the study was to determine any differences in %C and BD between different woody tissues (bark,sapwood and heartwood) in two widespread European oak species (Quercus pyrenaica and Quercus petraea).MethodsTwenty trees were felled in northern Spain, and 317 discs cut from the trees were dried and analysed to determine %C and BD.ResultsThere were significant differences in %C between bark, heartwood and sapwood, and between species. Therewere also significant differences in BD between the tissues (heartwood>sapwood>bark), and the BD was higher inQ. petraea than in Q. pyrenaica. Both %C and BD varied along the stem.ConclusionMore accurate estimates of carbon contents were obtained by using specific values for different heights and anatomical parts, than by using single values. PB Springer Paris SN 1297-966X YR 2012 FD 2012 LK http://uvadoc.uva.es/handle/10324/6482 UL http://uvadoc.uva.es/handle/10324/6482 LA eng NO Annals of Forest Science, September 2012, Vol. 69, n. 6, pp 663-672 NO Producción Científica DS UVaDOC RD 01-may-2024