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Minimum wood density of Juniperus thurifera is a robust proxy of spring water availability in a continental Mediterranean climate

AutorCamarero, Jesús Julio ; Rozas Ortiz, Vicente Fernando ; Olano Mendoza, José Miguel
Palabras clavedrought
Climate proxy
Juniperus thurifera
Mediterranean climate
wood density
Fecha de publicación2014
EditorBlackwell Publishing
CitaciónJournal of Biogeography 41(6): 1105-1114 (2014)
ResumenAim: The Mediterranean Basin is considered to be a climate-change hotspot, for which rising temperatures and associated aridification have been forecast. Such trends could affect the performance and growth of conifers in these drought-prone areas. We evaluated whether radial growth and wood density can act as proxy measures of precipitation and drought in a Mediterranean conifer. Location: Iberian Juniperus thurifera forests in northern and eastern Spain. Methods: We sampled 10 stands encompassing J. thurifera's distributional area. We related four annually resolved tree-ring variables (earlywood and latewood width, and maximum and minimum wood density) to climatic factors (temperature, precipitation and drought index) for the period 1951-2000. We then analysed the spatial and temporal patterns of those associations. Results: Of all the four tree-ring variables analysed, minimum wood density presented the strongest response to climate. Higher values of minimum wood density were related to drier spring conditions, particularly in the most xeric sites, confirming that a drought-induced reduction in the radial expansion of tracheids increases earlywood density. Main conclusions: Minimum wood density is a biogeographically meaningful proxy of spring water availability for the Mediterranean conifer J. thurifera. © 2014 John Wiley & Sons Ltd.
Versión del editorhttp://dx.doi.org/10.1111/jbi.12271
Identificadoresdoi: 10.1111/jbi.12271
issn: 0305-0270
e-issn: 1365-2699
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