Unravelling the influence of annual weather conditions and Mediterranean habitat types on acorn production, availability and predation

•Seed production and availability affect plant regeneration.•Habitat structure and composition affect oak acorn phenology, production, and availability.•Lower tree densities promote higher overall volume of acorns due to less intraspecific competition.•Infested acorns are more prevalent in habitats with less plant diversity and understory cover.•Habitat type is an important factor affecting primary production and should be considered in future studies.