English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/146986
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Winter drought impairs xylem phenology, anatomy and growth in Mediterranean Scots pine forests

AuthorsCamarero, Jesús Julio ; Guada, Guillermo; Sánchez-Salguero, R.; Cervantes, Emilio
Climatic extremes
Needle loss
Pinus sylvestris
Issue Date2016
PublisherOxford University Press
CitationTree Physiology 36(12): 1536-1549 (2016)
AbstractContinental Mediterranean forests face drought and cold stress. Drought and cold spells are climate extremes which can impair the recovery and resilience capacity of some Mediterranean forests. Climate warming could amplify the negative effects on forests of climate extremes by altering phenology phases (premature dehardening) and by magnifying drought stress. Here we capitalize on a winter-drought induced dieback triggered by a cold spell which occurred in December 2001 and affected Scots pine forests in E. Spain. We assessed post-dieback recovery by quantifying and comparing radial growth and xylem anatomy of non-declining (crown cover > 50%) and declining (crown cover ≤ 50%) trees in two sites (VP, Villarroya de los Pinares; TO, Torrijas). We also characterized aboveground productivity in site VP and xylogenesis in both sites during 2005. Dieback caused legacy effects since needle loss, a 60% reduction in aboveground biomass and radial-growth decline characterized declining trees three years after these dieback symptoms started in spring 2002. Declining trees formed collapsed tracheids in the 2002-ring earlywood, particularly in the most affected VP site where xylogenesis differences between non-declining and declining trees were most noticeable. The lower growth rates of declining trees were explained by a shorter duration of their major xylogenesis phases. In the site VP the radial-enlargement and wall-thickening of tracheids were significantly reduced in declining trees as compared to non-declining trees, and this was because these phases tended to start earlier and end later in non-declining than in declining trees. Gompertz models fitted to tracheid production predicted that maximum growth rates occurred 11-12 days earlier in non-declining than in declining trees. The formation of radially-enlarging tracheids was enhanced by longer days in both study sites and also by wetter conditions in the driest TO site, but this xylogenesis sensitivity to climate was reduced in declining trees. Winter-drought induced dieback impairs xylem anatomy and phenology, aboveground productivity, xylogenesis and growth in Mediterranean Scots pine populations. Affected stands show a costly post-dieback recovery challenging their resilience ability.
Description39 páginas, 5 tablas, 6 figuras, 2 figuras suplementarias. -- This is a pre-copyedited, author-produced version of an article accepted for publication in Tree Physiology following peer review. The version of record [J. J. Camarero, G. Guada, R. Sánchez-Salguero, E. Cervantes; Winter drought impairs xylem phenology, anatomy and growth in Mediterranean Scots pine forests. Tree Physiol 2016; 36 (12): 1536-1549] is available online at: http://dx.doi.org/10.1093/treephys/tpw077
Publisher version (URL)http://dx.doi.org/10.1093/treephys/tpw077
Appears in Collections:(IRNASA) Artículos
Files in This Item:
File Description SizeFormat 
Costly post dieback recovery - Cervantes.pdfArtículo principal1,49 MBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.