Effet Des Facteurs Stationnels Sur La Croissance Radiale Et La Réponse Du Pin D’alep Au Climat Dans Le Massif De L’ouarsenis, Algérie

Abstract

Effet des facteurs stationnels sur la croissance radiale et la réponse du pin d'Alep au climat dans le massif de l'Ouarsenis, Algérie Photo 1. Vue d'ensemble de la zone culminante de l'Ouarsenis où de vastes pinèdes se développent sur substrat calcaire. Photo M. Sarmoum. Correspondance électronique avec les auteurs / Electronic correspondence with authorssarmoum_med@yahoo.fr B O I S E T F O R Ê T S D E S T R O P I Q U E S , 2 0 1 6 , N° 3 2 9 ( 3 ) ABSTRACT EFFECTS OF STATION-SPECIFIC FACTORS ON RADIAL GROWTH AND RESPONSES TO CLIMATE IN ALEPPO PINES IN ALGERIA'S OUARSENIS RANGEThe relationships between climate and radial growth from 1967 to 2010 in nine Aleppo pine stands in the Ouarsenis range (north-western Algeria) were studied according to station-specific factors (substrate, altitude, exposure and age of the trees) using dendro-chronological methods, with an analysis of interannual variations in the thickness of growth rings. A retrospective analysis of radial growth showed high interannual variability in growth ring thickness within the same stand. The statistical parameters calculated showed highly variable radial growth between the different stands, which was related to station-specific factors and to tree age. Average growth ring thickness and persistence declined with the age of the trees. Average sensitivity to climate tended to be greater in trees growing on sandstone or schist substrates than on limestone. Our analysis of the relationships between climate and growth rings shows that the Aleppo pine is responsive to precipitation before or during the formation of growth rings. Higher temperatures, especially when they reach their maximum, have a negative effect on radial growth. The relationships between Aleppo pines and climatic conditions are modulated by station-specific factors, especially the substrate. The most responsive stands tend to be growing on a sandstone substrate. These results provide a useful description to help understand the ecological flexibility of the Aleppo pine and how it responds to climate change, with a view to proposing better ways of protecting pine forests that have been under threat for several decades.Keywords: Pinus halepensis, station-specific factors, radial growth, relationships between growth rings and climate, drought, Ouarsenis. RESUMEN EFECTO DE LOS FACTORES DE SITIO EN EL CRECIMIENTO RADIAL Y RESPUESTA DEL PINO CARRASCO AL CLIMA EN EL MACIZO DE OUARSENIS, ARGELIASe estudiaron las relaciones entre clima y crecimiento radial de nueve poblaciones de pino carrasco en el macizo montañoso de Ouarsenis (Noroeste de Argelia), en el período 1967-2010, atendiendo a factores de sitio (sustrato, altitud, exposición y edad de los árboles) y aplicando métodos de dendrocronología. Se analizaron las variaciones interanuales del ancho de los anillos. El estudio retrospectivo del crecimiento radial indica una alta variabilidad interanual del ancho de los anillos entre individuos de una misma población. Los parámetros estadísti-cos calculados reflejan indican una alta variabili...

Biomass, radial growth and regeneration capacity of Aleppo pine, and its possible use as rootstock in arid and degraded areas

“…Additionally, Olivar et al (2015) found that the radial growth of Aleppo pine was mainly influenced by rainfall. Similar results have been reported by Sarmoum et al (2016). Camarero et al (2020) studied the effect of environmental factors on the growth of P. halepensis stands and noted that their radial growth is related to the availability of water in the soil during previous wet seasons, namely previous spring and winter (Touchan et al 2017, Choury et al 2017).…”

“…Novak et al (2013b) suggested that IADF formation reflects the plasticity of Aleppo pine and its ability to resume cambial activity after summer drought. Sarmoum et al (2016) recorded a high variation in tree ring width among years even within the same stand. De Luis et al (2011) noted that in the young stage, Aleppo pine show great plasticity in wood formation under the effect of drought.…”

“…The relationship between Aleppo pine and climatic factors is modulated by local conditions, especially the soil. Stable stands are mostly located on sandstone substrates (Sarmoum et al 2016). Tree-ring analysis has shown that exposure, altitude, and topographic position are determinants of pine growth (Guit & Nedjimi 2020).…”

Impact of Drought and Site Characteristics on Vitality and Radial Growth of Cedrus Atlantica Manetti in the Ouarsenis Massif (Algeria)

“…Touchan et al (2017) showed that Atlas cedar has positive relationships with winter and spring precipitation and a negative response with spring and summer temperatures. In addition, compared to other species in the study area (Sarmoum et al, 2016;Hibbani et Abdoun, 2018), Atlas cedar growth is closely related to precipitations and appears more sensitive to drought. We found also that populations located at low altitude and/or marl and sandstone substrate are more sensitive to precipitation.…”

Bilan actuel et rétrospectif du dépérissement du cèdre de l’Atlas dans le Parc national de Theniet El Had (Algérie)

“…Cette baisse a marqué davantage la saison pluvieuse qui s'étend de l'hiver au printemps (figure 2b). Elle a entraîné un allongement de la période sèche (figure 2c) et un glissement des étages bioclimatiques vers l'aridité (Sarmoum et al, 2016).…”