Quarantining the Sahara desert: growth and water-use efficiency of Aleppo pine in the Algerian Green Barrier
Camarero Martínez, Jesús Julio
MetadataShow full item record
The Algerian Green Barrier, mainly composed of native and artificial Aleppo pine forests, spreads along the pre-Saharan steppes and is threatened by anthropogenic and natural disturbances, including climate change. We hypothesized that the ecophysiological functioning of this conifer has been substantially
modified in reaction to recent warming and drought much beyond the expected effect of CO2 fertilization. Our aim was to characterize the long-term performance (1925-2013) of native Aleppo pines thriving at their southernmost distribution. We used tree-ring width (TRW) and carbon isotope discrimination (Δ¹³C) to characterize basal area increment (BAI) and intrinsic water-use efficiency (WUEi) at three sites. BAI remained stable or slightly increased over time, with mean values ranging between 4.0 and 6.3 cm² year⁻¹. Conversely, site-Δ¹³C decreased from −0.022 to −0.014 year⁻¹ along time, which translated into WUEi increases of ca. 39%. This strong physiological reaction indicated that pines were responding simultaneously to rising CO2 and drier conditions, inducing a progressively tighter stomatal control of water losses. However, WUEi increments were essentially unrelated to BAI and did not affect carbon reserves, which suggests a high resilience to climate change. This finding could be due to shifts in growing season towards earlier months in winter-spring, as suggested by temporal changes in climate factors underlying Δ¹³C and TRW. Our study highlights the substantial plasticity of Aleppo pine, but this species is unlikely to follow a similar pace of ecophysiological adjustments according to unprecedented low Δ¹³C records and lack of WUEi stimulation observed from 2000 onwards. Quarantining the Sahara desert: growth and water-use efficiency of Aleppo pine in the Algerian Green Barrier. Available from: https://www.researchgate.net/publication/310598634_Quarantining_the_Sahara_desert_growth_and_water-use_efficiency_of_Aleppo_pine_in_the_Algerian_Green_Barrier [accessed Nov 23 2017].
Is part ofEuropean Journal Of Forest Research, 2017, vol. 136, núm. 1, p. 139-152
Showing items related by title, author, creator and subject.
Increasing drought effects on five European pines modulate Δ13C-growth coupling along a Mediterranean altitudinal gradient Shestakova, Tatiana A.; Camarero Martínez, Jesús Julio; Ferrio Díaz, Juan Pedro; Knorre, Anastasia A.; Gutiérrez, Emilia; Voltas Velasco, Jordi (British Ecological Society, 2017-06-01)1. Climate warming increases vulnerability to drought in Mediterranean water-limited forests. However, we still lack knowledge of the long-term physiological responses of coexisting pine species in these forests regarding ...
Spatio‐temporal patterns of tree growth as related to carbon isotope fractionation in European forests under changing climate Shestakova, Tatiana A.; Voltas Velasco, Jordi; Saurer, Matthias; Berninger, Frank; Esper, Jan; Andreu-Hayles, Laia; Daux, Valérie; Helle, Gerhard; Leuenberger, Markus; Loader, Neil J.; Masson‐Delmotte, Valérie; Saracino, Antonio; Waterhouse, John S.; Schleser, Gerhard H.; Bednarz, Zdzisław; Boettger, Tatjana; Dorado-Liñán, Isabel; Filot, Marc; Frank, David; Grabner, Michael; Haupt, Marika; Hilasvuori, Emmi; Jungner, Högne; Kalela‐Brundin, Maarit; Krąpiec, Marek; Marah, Hamid; Pawełczyk, S.; Pazdur, Anna; Pierre, Monique; Planells, Octavi; Pukienė, R.; Reynolds-Henne, Christina E.; Rinne‐Garmston(Rinne), Katja T.; Rita, Angelo; Sonninen, Eloni; Stiévenard, Michel; Switsur, Vincent R.; Szychowska‐Krapiec, Elżbieta; Szymaszek, Malgorzata; Todaro, Luigi; Treydte, Kerstin; Vitas, Adomas; Weigl, Martin; Wimmer, Rupert; Gutiérrez, Emilia (John Wiley & Sons Ltd, 2019)Aim The aim was to decipher Europe‐wide spatio‐temporal patterns of forest growth dynamics and their associations with carbon isotope fractionation processes inferred from tree rings as modulated by climate warming. Location ...
Aged but withstanding: Maintenance of growth rates in old pines is not related to enhanced water-use efficiency Granda, Elena; Camarero Martínez, Jesús Julio; Galván, J. diego; Sangüesa Barreda, Gabriel; Alla, Arben; Gutiérrez, Emilia; Dorado-Liñán, Isabel; Andreu-Hayles, Laia; Labuhn, Inga; Grudd, Håkan; Voltas Velasco, Jordi (Elsevier, 2017-05-03)Growth of old trees in cold-limited forests may benefit from recent climate warming and rising atmospheric CO2 concentrations (ca) if age-related constraints do not impair wood formation. To test this hypothesis, we studied ...