RT info:eu-repo/semantics/article T1 Does parental tree size determine acorn germination in Quercus ilex L. dehesas? A1 Houdas, Hermine Joséphine A1 Madrigal González, Jaime A1 Pallàs Martín, Anna A1 Silla, Fernando A1 Fernández Santos, Belén K1 Acorn traits K1 Germination K1 Parental tree K1 Quercus K1 Regeneration K1 Seed selection K1 3308 Ingeniería y Tecnología del Medio Ambiente AB Quercus ilex L. is an evergreen tree species widely spread throughout southwestern Europe. However, its poornatural regeneration poses major challenges since the 1980s, and so assisted regeneration is speculated to becritical for either maintaining existing populations or recovering degraded ones. This method, nonetheless, raisesmajor operational challenges related to fruit harvesting and selection in the field. For instance, the link betweenparental tree traits, such as age and size, and acorn characteristics has seldom been addressed; yet it could bedecisive for streamlining acorn selection. In this study, we employed Structural Equation Models (SEM) toexamine the relationship between parental tree Diameter at Breast Height (DBH) and acorn traits determinant forseed germination in Quercus species worldwide. Specifically, we measured acorn dry mass (ADM), seed moisture(SM), and pericarp thickness (PT) in a Q. ilex population in central-western Spain. Our results indicate a sig-nificant positive influence of parental tree DBH on ADM, with larger acorns associated with higher germinationpercentages. Similarly, SM positively influenced germination, though it was influenced by acorn size through twocontrasting pathways. PT, on the other hand, negatively impacted germination and was also negatively affectedby ADM. These findings suggest that acorn selection should prioritize large/old trees to maximize germinationvia increased ADM. Further research, nonetheless, is needed to progress in the relationships between parentaltree traits and acorn characteristics in this and other similar contexts in which large-scale plans for Q. ilexregeneration would be planned. PB Elsevier SN 0378-1127 YR 2025 FD 2025 LK https://uvadoc.uva.es/handle/10324/76997 UL https://uvadoc.uva.es/handle/10324/76997 LA eng NO Forest Ecology and Management, 2025, vol. 583, p. 122587 NO Producción Científica DS UVaDOC RD 02-ago-2025