Influence of tree density on climate-growth relationships in a Pinus pinaster Ait. forest in the northern mountains of Sardinia (Italy)
Gianluigi Mazza , Andrea Cutini, Maria Chiara Manetti
iForest - Biogeosciences and Forestry, Volume 8, Issue 4, Pages 456-463 (2014)
doi: https://doi.org/10.3832/ifor1190-007
Published: Oct 19, 2014 - Copyright © 2014 SISEF
Research Articles
Abstract
In view of the projected increases in the frequency and duration of drought events in the Mediterranean basin, a better understanding how differences in stand structure influence climate-growth relationships can improve and drive the conservation and management strategies for marginal forests in mountain areas. In this study, we examined the intra-annual variability of growth patterns and responses to climate of two maritime pine (Pinus pinaster Ait.) stands growing at contrasting tree densities at low elevation in northern Sardinia. A dendroclimatic analysis was used to assess the climate-growth relationships of these trees on monthly, seasonal and annual scales. The late spring and summer precipitations of the current year appeared to be the crucial climatic driver that encouraged the radial growth of the species in this mountain stand. However, summer drought was the primary climate constraint, exerting negative effects on P. pinaster growth. Summer Palmer drought severity index showed contrasting influence on latewood growth responses to drought conditions related to stand density, remaining significant also during the autumn months in the stand with the highest tree density. Our findings indicate that stands growing at high tree densities may experience more prolonged water shortages, especially during the late summer and early autumn months. Additionally, since the early 1980s, as precipitation has decreased, the influence of previous rainy years on radial growth has been highly significant in the stand with the lowest tree density. This result might suggests that these trees are able to utilize a greater amount of water reaching deeper soil horizons stored due to the previous rainy years, especially during periods of low precipitation.
Keywords
Pinus pinaster, Tree Rings, Stand Density, Climate-growth Relationships, Drought
Authors’ Info
Authors’ address
Andrea Cutini
Maria Chiara Manetti
Consiglio per la Ricerca e la sperimentazione in Agricoltura, Forestry Research Centre (CRA-SEL), v.le S. Margherita 80, I-52100 Arezzo (Italy)
Corresponding author
Paper Info
Citation
Mazza G, Cutini A, Manetti MC (2014). Influence of tree density on climate-growth relationships in a Pinus pinaster Ait. forest in the northern mountains of Sardinia (Italy). iForest 8: 456-463. - doi: 10.3832/ifor1190-007
Academic Editor
Davide Ascoli
Paper history
Received: Nov 28, 2013
Accepted: Jun 28, 2014
First online: Oct 19, 2014
Publication Date: Aug 02, 2015
Publication Time: 3.77 months
Copyright Information
© SISEF - The Italian Society of Silviculture and Forest Ecology 2014
Open Access
This article is distributed under the terms of the Creative Commons Attribution-Non Commercial 4.0 International (https://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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