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Caulerpa racemosa var. cylindracea as a potential source of organic matter for benthic consumers: evidences from a stable isotope analysis

Casu, Daniela and Ceccherelli, Giulia and Sechi, Nicola and Rumolo, Paola and Sarà, Gianluca (2009) Caulerpa racemosavar. cylindracea as a potential source of organic matter for benthic consumers: evidences from a stable isotope analysis. Aquatic Ecology, Vol. 43 (4), p. 1023-1029. eISSN 1573-5125. Article.

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DOI: 10.1007/s10452-008-9223-6

Abstract

Caulerpa racemosa var. cylindracea has been invading various types of substrates in wide areas throughout the Mediterranean Sea. However, the effects of the distribution of this alga on zoobenthos are scanty. The aim of this study was to evaluate the effects of C. racemosa invasion on the feeding habits of some zoobenthic taxa inhabiting the upper infralittoral rocky shores. This was done by identifying the isotopic N and C ratios of several potential food sources and testing differences in isotope composition among the taxa collected from areas invaded and not-invaded areas by C. racemosa. Results suggest that C. racemosa detritus was a significant food source for the polychaete Syllis prolifera, the gammarid Corophium sextonae and the gastropods Cerithium rupestre and Pisinna glabrata. They would also suggest that stable carbon and nitrogen isotope ratios deserve further attention as a possible valuable approach to understand the overall effect of C. racemosa spread on the trophic interactions among the species.

Item Type:Article
ID Code:3397
Status:Published
Refereed:Yes
Uncontrolled Keywords:Caulerpa racemosa, feeding habits, food source, stable isotope ratio, zoobenthos
Subjects:Area 05 - Scienze biologiche > BIO/07 Ecologia
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze botaniche, ecologiche e geologiche
Publisher:Springer Netherlands
eISSN:1573-5125
Deposited On:14 Jan 2010 12:01

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