Skip to Main content Skip to Navigation
Journal articles

Fire structures pine serotiny at different scales

Abstract : Premise of the study: Serotiny (delayed seed release with the consequent accumulation of a canopy seedbank) confers fitness benefits in environments with crown-fire regimes. Thus, we predicted that serotiny level should be higher in populations recurrently subjected to crown-fires than in populations where crown-fires are rare. In addition, under a high frequency of fires, space and resources are recurrently available, permitting recruitment around each mother to follow the seed rain shadow. Thus, we also predicted spatial aggregation of serotiny within populations. Methods: We compared serotiny, considering both the proportion and the age of serotinous cones, in populations living in contrasting fire regimes for two iconic Mediterranean pine species (Pinus halepensis, P. pinaster). We framed our results by quantitatively comparing the strength of the fire-serotiny relationship with previous studies worldwide. Key results: For the two species, populations living under high crown-fire recurrence regimes had a higher serotiny level than those populations where the recurrence of crown-fires was low. For P. halepensis (the species with higher serotiny), populations in high fire recurrence regimes had higher fine-scale spatial aggregation of serotiny than those inhabiting low fire recurrence systems. The strength of the observed fire-serotiny relationship in P. halepensis is among the highest in published literature. Conclusions: Fire regime shapes serotiny level among populations, and in populations with high serotiny, recurrent fires maintain a significant spatial structure for this trait. Consequently, fire has long-term evolutionary implications at different scales, emphasizing its prominent role in shaping the ecology of pines.
Document type :
Journal articles
Complete list of metadata

https://hal.inrae.fr/hal-02651200
Contributor : Migration Prodinra Connect in order to contact the contributor
Submitted on : Friday, May 29, 2020 - 3:50:54 PM
Last modification on : Friday, October 8, 2021 - 11:54:10 AM

Identifiers

Collections

Citation

Ana Hernández-Serrano, Miguel Verdú, Santiago C. González-Martínez, Juli G Pausas. Fire structures pine serotiny at different scales. American Journal of Botany, Botanical Society of America, 2013, 100 (12), pp.2349-2356. ⟨10.3732/ajb.1300182⟩. ⟨hal-02651200⟩

Share

Metrics

Record views

17