Site and Age Condition the Growth Responses to Climate and Drought of Relict Pinus nigra subsp. salzmannii Populations in Southern Spain

Navarro-Cerrillo, Rafael M.; Sanchez-Salguero, Raul; Delgado Manzanedo, Ruben; Julio Camarero, J.; Fernandez-Cancio, Angel (2014). Site and Age Condition the Growth Responses to Climate and Drought of Relict Pinus nigra subsp. salzmannii Populations in Southern Spain. Tree-ring research, 70(2), pp. 145-155. Tree-Ring Society with the cooperation of the Laboratory of Tree-Ring Research 10.3959/1536-1098-70.2.145

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To assess if tree age may modulate the main climatic drivers of radial growth, two relict Pinus nigra subsp. salzmannii populations (Maria, most xeric site; Magina, least xeric site) were sampled in southern Spain near the limits of the species range. Tree-ring width residual chronologies for two age groups (mature trees, age <= 100 years (minimum 40 years); old trees, age > 100 years) were built to evaluate their responses to climate by relating them to monthly precipitation and temperature and a drought index (DRI) using correlation and response functions. We found that drought is the main driver of growth of relict P. nigra populations, but differences between sites and age classes were also observed. First, growth in the most xeric site depends on the drought severity during the previous autumn and the spring of the year of tree-ring formation, whereas in the relatively more mesic site growth is mainly enhanced by warm and wet conditions in spring. Second, growth of mature trees responded more to drought severity than that of old trees. Our findings indicate that drought severity will mainly affect growth of relict P. nigra populations dominated by mature trees in xeric sites. This conclusion may also apply to similar mountain Mediterranean conifer relicts.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant Ecology
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Delgado Manzanedo, Ruben

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

1536-1098

Publisher:

Tree-Ring Society with the cooperation of the Laboratory of Tree-Ring Research

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

29 Aug 2014 10:10

Last Modified:

29 Aug 2014 10:10

Publisher DOI:

10.3959/1536-1098-70.2.145

Uncontrolled Keywords:

Andalusia, climate change, correlation function, dendroclimatology, drought stress, Mediterranean forests, Pinus nigra, relict forests

URI:

https://boris.unibe.ch/id/eprint/58291

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