Increase in size and nitrogen concentration enhances seedling survival in Mediterranean plantations. Insights from an ecophysiological conceptual model of plant survival.
Autores
Villar Salvador, Pedro; Puértolas Simón, Jaime; Cuesta Poveda, Bárbara; Peñuelas Rubira, Juan Luis; Uscola Fernández, María Mercedes; [et al.]Identificadores
Enlace permanente (URI): http://hdl.handle.net/10017/38529DOI: 10.1007/s11056-012-9328-6
ISSN: 0169-4286
Fecha de publicación
2012Filiación
Universidad de Alcalá. Departamento de Ciencias de la Vida. Unidad docente Ecología; Universidad de Alcalá. Departamento de Ciencias de la VidaPatrocinadores
Centro "El Serranillo" (Ministerio de Agricultura, España)
Ministerio de Economía y Competitividad
Comunidad de Madrid
Ministerio de Ciencia e Innovación
Cita bibliográfica
New Forests, 2012, v. 43, n. , p. 755-770
Palabras clave
Carbohydrates
Drought stress
Fertilization
Forest plantation
Nitrogen
Nutrients
Photosynthesis
Plant quality
Remobilization
Root growth
Proyectos
AGL2011-24296 ECOLPIN y CGL2010-18312 (Ministerio de Ciencia e Innovación)
FPI and FPU grants (Ministerio de Economia y Competitividad)
REMEDINAL-2 S2009/AMB/1783 (Comunidad de Madrid)
Tipo de documento
info:eu-repo/semantics/article
Versión
info:eu-repo/semantics/publishedVersion
Derechos
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
© Springer Science+Business Media B.V. 2012
Derechos de acceso
info:eu-repo/semantics/openAccess
Resumen
RESUMEN INCOMPLETO. Reduction in size and tissue nutrient concentration is widely considered to increase seedling drought resistance in dry and oligotrophic plantation sites. However, much evidence indicates that increase in size and tissue nutrient concentration improves seedling survival in Mediterranean forest plantations. This suggests that the ecophysiological processes and functional attributes relevant for early seedling survival in Mediterranean climate must be reconsidered. We propose a ecophysiological conceptual model for seedling survival in Mediterranean-climate plantations to provide a physiological explanation of the frequent positive relationship between outplanting performance and seedling size and nutrient concentration. The model considers the physiological processes outlined in the plantation establishment model of Burdett (Can J For Res 20:415&#-427, 1990), but incorporates other physiological processes that drive seedling survival, such as N remobilization, carbohydrate storage and plant hydraulics. The model considers that seedling survival in Mediterranean climates is linked to high growth capacity during the wet season. The model is for container plants and is based on three main principles, (1) Mediterranean climates are not dry the entire year but usually have two seasons of contrasting water availability; (2) summer drought is the main cause of seedling mortality; in this context, deep and large roots is a key trait for avoiding lethal water stress; (3) attainment of large root systems in the dry season is promoted when seedlings have high growth during the wet season. High growth is achieved when seedlings can divert large amount of resources to support new root and shoot growth. Functional traits that confer high photosynthesis, nutrient remobilization capacity, and non-structural carbohydrate storage promote high growth. Increases in seedling size and nutrient concentration strongly affect these physiological processes.
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Colecciones
- ECOLOGÍA - Artículos [239]