Sources of organic matter for intertidal consumers on Ascophyllum-shores (SW Iceland): a multi-stable isotope approach |
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Authors: | G. Sarà M. De Pirro C. Romano P. Rumolo M. Sprovieri A. Mazzola |
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Affiliation: | (1) Dipartimento di Biologia Animale, Università di Palermo, Via Archirafi, 18, 90123 Palermo, Italy;(2) Dipartimento di Biologia Animale e Genetica, Università di Firenze, Via Romana 17, 50100 Firenze, Italy;(3) IAMC-CNR-IRMA, Via da Terrazzano, 17, 91011 Castellammare del Golfo, Italy;(4) IAMC-CNR, Calata Porta di Massa - 80133 Porto di Napoli, Napoli, Italy |
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Abstract: | Stable isotopes were used to examine the origin of organic matter in Icelandic Ascophyllum-based habitats, the role of different organic matters in filling intertidal food webs and the food preferences of the most abundant suspension feeders, grazers and predators. We selected three intertidal sites on the SW coast of Iceland where we sampled in early September 2004, organic matter sources (POM, SOM and most abundant primary producers, A. nodosum and F. vesciculosus) and the most abundant macrofauna species (barnacles, mussels, gastropods, sponge and crabs). Even though the primary production (Ascophyllum-based) was the same at the three study sites, the isotopic composition of common-among-sites organisms varied due to local differences in the origin of available POM and SOM and in food web structures. |
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Keywords: | Benthic organism Intertidal environment Stable isotope Iceland North Atlantic |
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