IBONE   05434
INSTITUTO DE BOTANICA DEL NORDESTE
Unidad Ejecutora - UE
artículos
Título:
The evolution of dispersal traits based on diaspore features in South American populations of Senecio madagascariensis (Asteraceae)
Autor/es:
DEMATTEIS, BRUNO; COULLERI, JUAN P.; FERRUCCI, MARÍA S.
Revista:
AUSTRALIAN JOURNAL OF BOTANY
Editorial:
CSIRO PUBLISHING
Referencias:
Lugar: Collingwood; Año: 2019 vol. 67 p. 358 - 366
ISSN:
0067-1924
Resumen:
Plantinvasionsuccessisinfluencedbyseveraldrivingfactorssuchasthedispersal,environmentalconditions andthespeciescharacteristics.Inwinddispersedplants,thedispersaltraitsandthealtitudearekeyforpredictingdispersal ability.Inthiswork,weestimatedthisfeatureinSeneciomadagascariensisinvasivepopulationsfromArgentinaandBrazil using diaspore traits to understand its dynamics. Our results show that dispersal is strongly affected by the geographic conditions.WeobservedthatinArgentinianpopulationsgrowingathigheraltitudes,selectionfavourslargerseeds,which mightfavourseedlingestablishmentoveroflongerdispersaldistance.Conversely,populationsgroupedinloweraltitudes show higher dispersal ability, probably due to the adaptation to environment and assortment of the better dispersal genotypes. In contrast, the Brazilian populations display rapid dispersal ability due to recent colonisation and multiple introductions. The variability in the gene pool could facilitate the occurrence of genotypes with greater dispersal, which couldexplainwhythesepopulationsdisplaygreaterdispersalabilitythantheArgentineones.Inconclusion,thephenotypic response to geographic conditions and the population density play an important role in the dispersion strategies in S. madagascariensis.