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Título: Inter-annual variability in Prosopis caldenia pod production in the Argentinean semiarid pampas: A modelling approach
Autor: Risio, Lucía
Calama, Rafael
Bogino, Stella M.
Bravo Oviedo, Felipe
Año del Documento: 2016
Editorial: Universidad de Valladolid
Descripción: Producción Científica
Documento Fuente: Journal of Arid Environments, August 2016, Vol. 131, Issue 4, pp 59-66
Resumen: The driest part of the Argentinean pampas is occupied by semiarid woodlands dominates by Prosopis caldenia Burkart (Calden). Calden pods are a highly valuable fodder supplement for livestock but its production is highly variable. Our objective was to analyze and model the temporal pattern in inter-annual variability of Calden pod production. Our key hypothesis is that weather conditions are the main determinant of the pod masting behavior. Tree size and climatic variables were evaluated as explanatory covariates using a zero-inflated log-normal modelling approach. The proposed final model structure incorporated 25 parameters, including four variance components, two intercepts for both the logistic and the log-normal parts of the model, and nineteen parameters associated with fixed effects. Climate had a strong influence on the flowering-fruiting Calden process and on the inter-annual variability of the final pod production at the tree level. Temperatures during bud breaking, flowering and fruit shedding, together with the precipitation from the final month of fruit shedding and the total amount of the prior vegetative cycle, were the main weather covariates that affect the processes.
Materias (normalizadas): Productos forestales
Revisión por Pares: SI
DOI: doi:10.1016/j.jaridenv.2016.03.007
Idioma: eng
Derechos: info:eu-repo/semantics/openAccess
Aparece en las colecciones:DEP57 - Artículos de revista

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