Détails de cette espèce dans San Francisco Bay (Estuary) Statut: Exotique
Statut d'envahissement: Envahissant
Occurrence: Signalé(e)
Source: May et al. Undated Date d'introduction:
Mode d'Introduction: Notes sur l'espèce pour cette localité:
Lambrinos (2001) reports that, "Joseph Sexton had 5000 plants of C. selloana in production in Santa Barbara at the height of the pampas plume industry in 1889, and exported almost 500 000 plumes per year with an additional 500 000 plumes per year exported by other growers. The change in invasive status of populations over the past 80 years, and the change in morphological traits over the same time suggest that populations of C. selloana have experienced genetic adjustments since their introduction into California. Over the past 80 years the inflorescences of C. selloana have become more similar to those of C. jubata. The plumes have darkened, the spikelets and awns have shortened and the number of florets has decreased. Hybridization between the two species is unlikely, and the apparent convergence of floral form probably represents an adjustment to changing selective pressures." Notes sur la gestion de l'espèce dans cette localité:
Dernière mise à jour: 17/05/2005 12:49:22 p.m.
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