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dc.contributor.authorRozas Ortiz, Vicente Fernando-
dc.contributor.authorGarcía-González, Ignacio-
dc.contributor.authorZas Arregui, Rafael-
dc.identifiere-issn: 0931-1890-
dc.identifier.citationTrees - Structure and Function 25 (3): 443-453 (2011)-
dc.description.abstractTree rings of Pinus pinaster often contain intra-annual density fluctuations (IADFs), which have been attributed to the succession of dry and rainy periods typical of Mediterranean climate, but their formation has not been studied yet under Atlantic climate. We analyzed the occurrence and climatic significance of replicated IADFs in ten monospecific stands in NW Spain. The frequency of IADFs was higher than previously reported for this species under Mediterranean conditions and consistently decreased with increasing elevation. The formation of bands of latewood-like tracheids within the earlywood was favored by dry previous August, cold previous winter and dry April. Bands of earlywood-like tracheids within the early latewood were also favored by low winter temperatures. However, their occurrence was geographically heterogeneous, with two groups of stands being defined by their distances to the shoreline. In coastal stands, cold May-August triggered IADFs formation, while in inland stands their formation was favored by dry May-July. Regional winter temperatures and April water balance were strongly related to the East Atlantic (EA) pattern, which greatly conditioned the occurrence of IADFs in the earlywood and the early latewood. By contrast, the presence of bands of earlywood-like tracheids in the late latewood was independent of the EA pattern, being strongly related to warm conditions in spring and especially to a wet October. The link between regional climate and the EA pattern strongly controlled the physiological processes that determine intra-annual growth dynamics and short-term cell enlargement of P. pinaster in NW Spain.-
dc.titleClimatic control of intra-annual wood density fluctuations of Pinus pinaster in NW Spain-
dc.description.versionPeer Reviewed-
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