期刊
CANADIAN JOURNAL OF FOREST RESEARCH
卷 48, 期 4, 页码 333-344出版社
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/cjfr-2017-0139
关键词
dendrometers; mixed stands; climate change; nonlinear mixed models; Mediterranean species
类别
资金
- Spanish Ministry of Economy and Competitiveness (MINECO) [FPI BES-2011-050760, AGL-2010-15521, RTA-2013-00011-C02-01]
- National Institute for Agricultural and Food Research and Technology from Spain (INIA) [AT-2013-004]
- ITACyL-Diputacion de Valladolid-INIA [CC-16-095-PROPINEA]
- French National Research Agency (ANR) as part of Programme d'Investissements d'Avenir [ANR-11-LABX-0002-01]
Studying intra-annual growth dynamics through a modelling approach has proved useful for characterizing differences in wood phenology between species and deviations from the expected tree growth due to climate change. The aim of this paper was to determine the climatic factors and the inter-and intra-specific competition traits that drive intra-annual secondary growth dynamics in three Mediterranean tree species that naturally co-exist in the Spanish Northern Plateau (Pinus pinea L., Juniperus thurifera L., and Quercus ilex subsp. ballota (Desf.) Samp.). For this purpose, we obtained girth increment data from band dendrometers installed on 58 trees from May 2012 to April 2015. Half of them were located in a high-density plot and half were in a low-density plot. These data were analysed through a nonlinear multifactorial model considering daily and cumulative climatic effects together with inter-and intra-specific competition indices. Our results provide evidence of a spatiotemporal niche separation between species. Compared with other species, Q. ilex subsp. ballota showed a wider thermal amplitude, a higher mean optimum temperature for growth, and a milder effect of drought on its secondary growth. Under current climate change projections, simulations based on our model predict a secondary growth reduction for P. pinea and a growth enhancement for Q. ilex subsp. ballota in these Mediterranean mixtures.
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