10.5061/DRYAD.N50B4
Lagache, Lélia
French National Institute for Agricultural Research
University of Bordeaux
Klein, Etienne K.
Biostatistique et Processus Spatiaux
Guichoux, Erwan
French National Institute for Agricultural Research
University of Bordeaux
Petit, Rémy J.
French National Institute for Agricultural Research
University of Bordeaux
Data from: Fine-scale environmental control of hybridization in oaks
Dryad
dataset
2012
Habitat Degradation
Quercus robur
Species interactions
Plant Mating Systems
Population ecology
Quercus petraea
2012-10-11T18:17:46Z
2012-10-11T18:17:46Z
en
https://doi.org/10.1111/mec.12121
372632 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Natural hybridization is attracting much interest in modern speciation and
conservation biology studies, but the underlying mechanisms remain poorly
understood. In particular, it is unclear why environmental changes often
increase hybridization rates. To study this question, we surveyed mating
events in a mixed oak stand and developed a spatially-explicit
individual-based hybridization model. This model, where hybridization is
frequency dependent, pollen is non-limiting and which allows immigrant
pollen to compete with local pollen, takes into account species-specific
pollen dispersal and sexual barriers to hybridization. The consequences of
pollen limitation on hybridization were studied using another simple
model. The results indicate that environmental changes could increase
hybridization rates through two distinct mechanisms. First, by disrupting
the spatial organisation of communities, they should decrease the
proportion of conspecific pollen available for mating, thus increasing
hybridization rates. Second, by decreasing the density of conspecifics,
they should increase pollen limitation and thus hybridization rates, as a
consequence of chance pollination predominating over deterministic pollen
competition. Altogether, our results point to a need for considering
hybridization events at the appropriate level of organisation and provide
new insights into why hybridization rates generally increase in disturbed
environments.
Lagache2012
western France
longitude: 0.17° W
latitude: 48.08° N
Petite Charnie State Forest