Aged but withstanding: Maintenance of growth rates in old pines is not related to enhanced water-use efficiency
Camarero Martínez, Jesús Julio
Galván, J. diego
Sangüesa Barreda, Gabriel
MetadataShow full item record
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 old Mountain pine trees at three Pyrenean high-elevation forests subjected to
cold-wet (ORD, AIG) or warmer-drier (PED) conditions. We analyzed long-term trends (1450–2008) in growth (BAI, basal area increment), maximum (MXD) and minimum (MID) wood density, and tree-ring carbon (δ13C) and oxygen (δ18O) isotope composition, which were used as proxies for intrinsic water-use efficiency (iWUE) and stomatal conductance (gs), respectively. Old pines showed positive (AIG and ORD) or stable (PED) growth trends during the industrial period (since 1850) despite being older than 400 years. Growth and wood density covaried from 1850 onwards. In the cold-wet sites (AIG and ORD) enhanced photosynthesis through rising ca was likely responsible for the post-1850 iWUE improvement. However, uncoupling between BAI and iWUE indicated that increases in iWUE were not responsible for the higher growth but climate warming. A reduction in gs was inferred from increased δ18O for PED trees from 1960 onwards, the warmest site where the highest iWUE increase occurred (34%). This suggests that an emergent drought stress at warm-dry sites could trigger stomatal closure to avoid excessive transpiration. Overall, carbon acquisition as lasting woody pools is expected to be maintained in aged trees from cold and high-elevation sites where old forests constitute unique long-term carbon reservoirs.
Is part ofAgricultural and Forest Meteorology, 2017, vol. 243, p. 43-54
The following license files are associated with this item:
Showing items related by title, author, creator and subject.
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 ...
Quarantining the Sahara desert: growth and water-use efficiency of Aleppo pine in the Algerian Green Barrier Choury, Zineb; Shestakova, Tatiana A.; Himrane, Hocine; Touchan, Ramzi; Kherchouche, Dalila; Camarero Martínez, Jesús Julio; Voltas Velasco, Jordi (Springer Verlag, 2017-02-01)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 ...
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 ...