Effects of the invasive macroalga Lophocladia lallemandii on the diet and trophism of Pinna nobilis (Mollusca: Bivalvia) and its guests Pontonia pinnophylax and Nepinnotheres pinnotheres (Crustacea: Decapoda)
Pinna nobilis and its guests Pontonia pinnophylax and Nepinnotheres pinnotheres were sampled from Posidonia oceanica meadows invaded and non-invaded by the red alga Lophocladia lallemandii. Understanding the interactions among native and invasive species was the primary aim. Therefore, the effects o...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2010 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:dnet:digitalcsic_::11af089b71d68aabebd627a4539f0a03 |
| Acceso en línea: | http://hdl.handle.net/10261/317962 |
| Access Level: | acceso abierto |
| Palabra clave: | Medio Marino Centro Oceanográfico de Baleares Pinna nobilis Pontonia pinnophylax Nepinnotheres pinnotheres food sources stable isotopes mixing models Lophocladia lallemandii Posidonia oceanica |
| Sumario: | Pinna nobilis and its guests Pontonia pinnophylax and Nepinnotheres pinnotheres were sampled from Posidonia oceanica meadows invaded and non-invaded by the red alga Lophocladia lallemandii. Understanding the interactions among native and invasive species was the primary aim. Therefore, the effects of the invasive L. lallemandii on the percentage contribution of the food sources of P. nobilis and its guests and their trophic associations were investigated by applying mixing models to the δ13C and δ15 Nstable isotopes. Isotopic analyses revealed that the guests of P. nobilis occupied a higher trophic level than their host due to their capacity for food selection. The invasion of L. lallemandii altered the percentage contribution of the food sources to the consumers’ diet. Whereas the percentage contribution of the food sources to the δ13C signatures did not really change, L. lallemandii produced variations in the percentage contribution to the δ15N signatures. This red macroalga represented one of the main food sources for P. nobilis, with a real contribution of 19.4% in the invaded meadows. Moreover, L. lallemandii slightly decreased the trophic level of the consumers. This study provides the first isotopic and trophic data for the pea crab N. pinnotheres |
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