Article
Post-disturbance genetic changes: the impact of the 2010 mega-earthquake and tsunami on chilean sandy beach fauna
Cambios genéticos posteriores a la perturbación: el impacto del mega terremoto y tsunami de 2010 en Chile Playa de arena Fauna;
Cambios genéticos post-disturbio: impacto del megaterremoto y tsunami de 2010 en la fauna de playas arenosas chilenas.
Registro en:
Scientific reports 2019 Oct 02; Vol. 9 (1), pp. 14239
2045-2322
Autor
Brante, Antonio
Guzmán-Rendón, Garen
Barría, Erwin M.
Guillemin, Marie-Laure
Vera-Escalona, Iván
Hernández, Cristián E.
Resumen
Earthquake/tsunamis can have profound impacts on species and their genetic patterns. It is expected
that the magnitude of this impact might depend on the species and the time since the disturbance
occurs, nevertheless these assumptions remain mostly unexplored. Here we studied the genetic
responses of the crustacean species Emerita analoga, Excirolana hirsuticauda, and Orchestoidea
tuberculata to the 27F mega-earthquake/tsunami that occurred in Chile in February 2010. mtDNA
sequence analyses revealed a lower haplotype diversity for E. analoga and E. hirsuticauda in impacted
areas one month after the 27F, and the opposite for O. tuberculata. Three years after the 27F we
observed a recovery in the genetic diversity of E. analoga and E. hirsuticauda and decrease in the genetic
diversity in O. tuberculata in 2/3 of sampled areas. Emerita analoga displayed decrease of genetic
diferentiation and increase in gene fow explained by long-range population expansion. The other two
species revealed slight increase in the number of genetic groups, little change in gene fow and no signal
of population expansion associated to adult survival, rapid colonization, and capacity to burrow in the
sand. Our results reveal that species response to a same disturbance event could be extremely diverse
and depending on life-history traits and the magnitude of the efect.