COMPETITIVE EFFECTS OF THE ALIEN INVASIVE CENTAUREA SOLSTITIALISL. ON TWO CHILEAN BACCHARIS SPECIES AT DIFFERENT LIFE-CYCLE STAGES

Gómez-González, Susana; Cavieres, Lohengrin, A.; Torres, Patricio; Torres-Díaz, Cristian

Abstract

"Several studies have revealed a variety of mechanisms of invasion of alien plant species. However, little is known on how those mechanisms and their associated effects on native species change across different life-cycle stages. Under controlled conditions, we assessed the interactions between the alien invasive species Centaurea solstitialis L. (Asteraceae) and two pioneer native species to the Chilean matorral; Baccharis linearis (Ruiz et Pav.) Pers. and B. paniculata DC. (Asteraceae). Competitive effects of the invader on natives were evaluated by combining different life-cycle stages: seed-seed, plant-seed, and plant-plant. Seed germination of C. solstitialis was explosive and much faster than that of the native species. The presence of C. solstitialis (individuals or seeds) did not affect negatively the seed germination of the two Baccharis species. However, the presence of C. solstitialis plants significantly decreased the total biomass o

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Título según SCIELO: COMPETITIVE EFFECTS OF THE ALIEN INVASIVE CENTAUREA SOLSTITIALISL. ON TWO CHILEAN BACCHARIS SPECIES AT DIFFERENT LIFE-CYCLE STAGES
Título de la Revista: Gayana. Botánica
Volumen: 66
Número: 1
Editorial: Facultad de Ciencias Naturales y Oceanográficas. , Universidad de Concepción
Fecha de publicación: 2009
Página de inicio: 71
Página final: 83
Idioma: en
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432009000100007&lng=en&nrm=iso&tlng=en
DOI:

10.4067/S0717-66432009000100007

Notas: SCIELO