Coupling a water balance model with forest inventory data to predict drought stress: the role of forest structural changes vs. climate changes
Fecha de publicación2015-07-09
De Cáceres, Miquel
Pausas, Juli G. (Juli Garcia)
MetadatosMostrar el registro completo del ítem
Mechanistic water balance models can be used to predict soil moisture dynamics and drought stress in individual forest stands. Predicting current and future levels of plant drought stress is important not only at the local scale, but also at larger, landscape to regional, scales, because these are the management scales at which adaptation and mitigation strategies are implemented. To obtain reliable predictions of soil moisture and plant drought stress over large extents, water balance models need to be complemented with detailed information about the spatial variation of vegetation and soil attributes. We designed, calibrated and validated a water balance model that produces annual estimates of drought intensity and duration for all plant cohorts in a forest stand. Taking Catalonia (NE Spain) as a case study, we coupled this model with plot records from two Spanish forest inventories in which species identity, diameter and height of plant cohorts were available. Leaf area index of each plant cohort was estimated from basal area using species-specific relationships. Vertical root distribution for each species in each forest plot was estimated by determining the distribution that maximized transpiration in the model, given average climatic conditions, soil attributes and stand density. We determined recent trends (period 1980–2010) in drought stress for the main tree species in Catalonia; where forest growth and densification occurs in many areas as a result of rural abandonment and decrease of forest management. Regional increases in drought stress were detected for most tree species, although we found high variation in stress changes among individual forest plots. Moreover, predicted trends in tree drought stress were mainly due to changes in leaf area occurred between the two forest inventories rather than to climatic trends. We conclude that forest structure needs to be explicitly considered in assessments of plant drought stress patterns and trends over large geographic areas, and that forest inventories are useful sources of data provided that reasonably good estimates of soil attributes and root distribution are available. Our approach coupled with recent improvements in forest survey technologies may allow obtaining spatially continuous and precise assessments of drought stress. Further efforts are needed to calibrate drought-related demographic processes before water balance and drought stress estimates can be fully used for the accurate prediction of drought impacts.
Es parte deAgricultural and Forest Meteorology, 2015, vol. 213, p. 77-90
Proyectos de investigación europeos
Showing items related by title, author, creator and subject.
Reassessing global change research priorities in mediterranean terrestrial ecosystems: how far have we come and where do we go from here? Doblas Miranda, Enrique; Martínez-Vilalta, Jordi; Lloret, Francisco; Álvarez Nebot, Albert; Àvila i Castells, Anna; Bonet García, Francisco Javier; Brotons, Lluís; Castro, J.; Curiel Yuste, Jorge; Díaz, M.; Ferrandis, Pablo; García-Hurtado, E.; Iriondo, J.M.; Keenan, T. F.; Latron, J.; Llusià Benet, Joan; Loepfe, L.; Mayol, Maria; Moré, Gerard; Moya, D.; Peñuelas, Josep; Pons, Xavier; Poyatos, Rafael; Sardans i Galobart, Jordi; Sus, Oliver; Vallejo Calzada, V. R.; Vayreda, Jordi; Retana, Javier (Wiley, 2014-09-30)Aim: Mediterranean terrestrial ecosystems serve as reference laboratories for the investigation of global change because of their transitional climate, the high spatiotemporal variability of their environmental conditions, ...
Assessing the distribution of forest ecosystem services in a highly populated Mediterranean region Roces-Díaz, José V.; Vayreda, Jordi; Banqué-Casanovas, Mireia; Cusó, Martí; Anton, Marc; Bonet Lledos, José Antonio; Brotons, Lluís; De Cáceres, Miquel; Herrando, Sergi; Martínez de Aragón, Juan; Miguel Magaña, Sergio de; Martínez-Vilalta, Jordi (Elsevier, 2018-06-20)Forest ecosystems provide a wide range of goods and services to society and host high levels of biodiversity. Nevertheless, forest ecosystem services (ES) are often quantified and assessed using simplified methodologies ...
Future trade-offs and synergies among ecosystem services in Mediterranean forests under global change scenarios Morán-Ordóñez, Alejandra; Améztegui González, Aitor; De Cáceres, Miquel; Miguel Magaña, Sergio de; Lefevre, François; Brotons, Lluís; Coll Mir, Lluís (Elsevier, 2020-09-02)Mediterranean forests play a key role in providing services and goods to society, and are currently threatened by global change. We assessed the future provision of ecosystem services by Mediterranean pine forests under a ...