UnissResearch

Logo Universitàegli studi di Sassari
titoli, abstracts, parole chiave >>>
Effects of competition between two introduced Caulerpa

Piazzi, Luigi and Ceccherelli, Giulia (2002) Effects of competition between two introduced Caulerpa. Marine Ecology Progress Series, Vol. 225 , p. 189-195. eISSN 1616-1599. Article.

[img]
Preview
Full text disponibile come PDF Richiede visualizzatore di PDF come GSview, Xpdf o Adobe Acrobat Reader
146Kb

DOI: 10.3354/meps225189

Abstract

Competitive interactions between 2 introduced algae, Caulerpa taxifolia and C. racemosa, were studied in 2 experiments. The first separately evaluated the interspecific and intraspecific effects on both species by manipulating their abundance. The second investigated the fate of fragments of C. taxifolia transplanted into patches of C. racemosa, in contrast to those established on algal turfs. C. racemosa and C. taxifolia had similar temporal trends in growth but reached different sizes. The overall increase in stolon length at higher densities for both species suggested that positive interactions are very important. However, there was a significant interspecific effect on C. taxifolia stolon length but no effect on C. racemosa. Furthermore, C. taxifolia fragments transplanted into C. racemosa patches showed clear signs of stress with respect to those transplanted into algal turfs: blades became blanched and eroded. Overall, the results of this study suggest that growth increases with density augmentation, therefore suggesting that invasive characteristics of the species may increase with the time of colonisation. Both species tend to spread faster at higher density. Overall, where both species co-occur, we predict that C. racemosa would be the favoured species as regards the outcome of competition.

Item Type:Article
ID Code:640
Status:Published
Refereed:Yes
Uncontrolled Keywords:Caulerpa taxifolia, Caulerpa racemosa, competition, introduced species, positive interaction
Subjects:Area 05 - Scienze biologiche > BIO/07 Ecologia
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze botaniche, ecologiche e geologiche
Publisher:Inter-Research
eISSN:1616-1599
Publisher Policy:Depositato in conformità con la politica di copyright dell'Editore
Deposited On:18 Aug 2009 10:02

I documenti depositati in UnissResearch sono protetti dalle leggi che regolano il diritto d'autore

Repository Staff Only: item control page