Ability to avoid water stress in seedlings of two oak species is lower in a dense forest understory than in a medium canopy gap

Abrams, 1995, Gas exchange, leaf structure and nitrogen in contrasting successional tree species growing in open and understory sites during a drought, Tree Physiol., 15, 361, 10.1093/treephys/15.6.361 Abril, 1998, Ecophysiological responses of three evergreen woody Mediterranean species to water stress, Acta Oecol., 19, 377, 10.1016/S1146-609X(98)80042-8 Aranda, 1996, Seasonal water relations of three broadleaved species (Fagus sylvatica L., Quercus petraea (Mattuschka) Liebl and Quercus pyrenaica Willd) in a mixed stand in the centre of the Iberian Peninsula, For. Ecol. Manage., 84, 219, 10.1016/0378-1127(96)03729-2 Aranda, 2004, Improvement of growth conditions and gas exchange of Fagus sylvatica L. seedlings planted below a recently thinned Pinus sylvestris L. stand, Trees, 18, 211, 10.1007/s00468-003-0296-5 Aranda, 2005, Effects of the interaction between drought and shade on water relations, gas exchange and morphological traits in cork oak (Quercus suber L.) seedlings, For. Ecol. Manage., 210, 117, 10.1016/j.foreco.2005.02.012 Backes, 2000, Leaf water relations of competitive Fagus sylvatica and Quercus petraea trees during 4 years differing in soil drought, Can. J. For. Res., 30, 335, 10.1139/cjfr-30-3-335 Barigah, 2006, Irradiance-induced plasticity in the hydraulic properties of saplings of different temperate broad-leaved forest tree species, Tree Physiol., 26, 1505, 10.1093/treephys/26.12.1505 Bellot, 2004, Afforestation with Pinus halepensis reduces native shrub performance in a Mediterranean semiarid area, Acta Oecol., 25, 7, 10.1016/j.actao.2003.10.001 Buckley, 1998, Regeneration of northern red oak: positive and negative effects of competitor removal, Ecology, 79, 65, 10.1890/0012-9658(1998)079[0065:RONROP]2.0.CO;2 Castro, 2004, Benefits of using shrubs as nurse plants for reforestation in Mediterranean mountains: a 4-year study, Res. Ecol., 12, 352, 10.1111/j.1061-2971.2004.0316.x Climent, 2006, Developmental constraints limit the response of Canary Island pine seedlings to combined shade and drought, For. Ecol. Manage., 231, 164, 10.1016/j.foreco.2006.05.042 Cochard, 1999, The effects of acclimation to sunlight on the xylem vulnerability to embolism in Fagus sylvatica L, Plant Cell Environ., 22, 101, 10.1046/j.1365-3040.1999.00367.x Crunkilton, 1992, Water relations and gas exchange of northern red oak seedlings planted in a central Missouri clearcut and shelterwood, For. Ecol. Manage., 53, 117, 10.1016/0378-1127(92)90039-C DeLucia, 1991, Resource-use efficiency and drought tolerance in adjacent Great Basin and Sierran plants, Ecology, 72, 51, 10.2307/1938901 Gallego, 1994, Leaf water potential and stomatal conductance in Q. pyrenaica Willd. forests: vertical gradients and response to environmental factors, Tree Physiol., 14, 1039, 10.1093/treephys/14.7-8-9.1039 Gómez-Aparicio, 2004, Applying plant facilitation to forest restoration: a meta-analysis of the use of shrubs as nurse plants, Ecol. Appl., 14, 1128, 10.1890/03-5084 Holmgren, 1997, The interplay of facilitation and competition in plant communities, Ecology, 78, 1966, 10.1890/0012-9658(1997)078[1966:TIOFAC]2.0.CO;2 Johnson, 2002 Kozlowski, 1997 Kramer, 1995 Kubiske, 1996, Stomatal and nonstomatal limitations of photosynthesis in relation to the drought and shade tolerance of tree species in open and understory environments, Trees, 11, 76, 10.1007/s004680050062 Maestre, 2003, Does Pinus halepensis facilitate the establishment of shrubs in Mediterranean semi-arid afforestations?, For. Ecol. Manage., 176, 147, 10.1016/S0378-1127(02)00269-4 McConnaughay, 1999, Biomass allocation in plants: ontogeny or optimality? A test along three resource gradients, Ecology, 80, 2581, 10.1890/0012-9658(1999)080[2581:BAIPOO]2.0.CO;2 Mediavilla, 2003, Stomatal responses to drought at a Mediterranean site: a comparative study of co-occurring woody species differing in leaf longevity, Tree Physiol., 23, 987, 10.1093/treephys/23.14.987 Mendes, 2001, Acclimation of Myrtus communis to contrasting Mediterranean light environments—effects on structure and chemical composition of foliage and plant water relations, Environ. Exp. Bot., 45, 165, 10.1016/S0098-8472(01)00073-9 Michalet, 2006, Is facilitation in arid environments the result of direct or complex interactions?, New Phytol., 169, 3, 10.1111/j.1468-8137.2006.01617.x Ngugi, 2004, Physiological responses to water stress in Eucalyptus cloeziana and E. argophloia seedlings, Trees, 18, 381, 10.1007/s00468-003-0316-5 Pardo, F., 2000. Caracterización de rodales arbolados del “Hayedo de Montejo” (Madrid): estructura, composición e incorporación de la hojarasca al suelo. PhD Thesis. Pausas, 2004, Pines and oaks in the restoration of Mediterranean landscapes of Spain: new perspectives for an old practice—a review, Plant Ecol., 171, 209, 10.1023/B:VEGE.0000029381.63336.20 Ponton, 2001, Carbon isotope discrimination and wood anatomy variations in mixed stands of Quercus robur and Quercus petraea, Plant Cell Environ., 24, 861, 10.1046/j.0016-8025.2001.00733.x Ponton, 2002, Comparisons of water-use efficiency of seedlings from two sympatric oak species: genotype x environment interactions, Tree Physiol., 22, 413, 10.1093/treephys/22.6.413 Quero, 2006, Interactions of drought and shade effects on seedlings of four Quercus species: physiological and structural leaf responses, New Phytol., 170, 819, 10.1111/j.1469-8137.2006.01713.x Ricard, 2003, Do understory saplings respond to both light and below-ground competition? A field experiment in a north-eastern American hardwood forest and a literature review, Ann. For. Sci., 60, 749, 10.1051/forest:2003069 Rodríguez-Calcerrada, 2007, Summer field performance of Quercus petraea (Matt.) Liebl and Quercus pyrenaica Willd seedlings, planted in three sites with contrasting canopy cover, New For., 33, 67, 10.1007/s11056-006-9014-7 Sack, 2004, Responses of temperate woody seedlings to shade and drought: do trade-offs limit potential niche differentiation, Oikos, 107, 110, 10.1111/j.0030-1299.2004.13184.x Smith, 1989, A theory of the spatial and temporal dynamics of plant communities, Vegetation, 83, 49, 10.1007/BF00031680 Valladares, 2002, Drought can be more critical in the shade than in the sun: a field study of carbon gain and photo-inhibition in a Californian shrub during a dry El Niño year, Plant Cell Environ., 25, 749, 10.1046/j.1365-3040.2002.00856.x Wang, 2006, Effects of light intensity on the growth and energy balance of photosystem. II. Electron transport in Quercus alba seedlings, Ann. For. Sci., 63, 111, 10.1051/forest:2005103 Zavala, 2000, Constrains and trade-offs in Mediterranean plant communities: the case of holm oak–Aleppo pine forests, Bot. Rev., 66, 119, 10.1007/BF02857785