title: Caulerpa cylindracea Sonder invasion modifies trophic niche in infralittoral rocky benthic community.
abstract: The Mediterranean basin is one of the most invaded seas of the world. Invasive species have affected coastal benthic communities inducing structural changes. Since first reports, in the early 90s, Caulerpa cylindracea is considered one of the most important invasive event in the Mediterranean Sea where it has invaded large areas of soft bottoms, seagrass meadows and rocky shores. To assess effects of C. cylindracea in rocky ecosystems, benthic food webs have been compared between invaded and non-invaded coastal conditions through stable isotopes analyses. In addition, the convex hull area of the two types of conditions has been calculated as a proxy for the total extent of trophic diversity within each food web. Results have shown that the trophic niche width is at least 1.4 times wider in invaded conditions than in non-invaded conditions. In addition, this study gives further evidence of similar feeding analogies between the invasive herbivore fish, Siganus luridus and native herbivore fish Sparisoma cretense as both are feeding at the same isotopic level. This investigation provides with new scientific data to assess bionvasions in invaded and non-invaded conditions at assemblage level in coastal systems.
authors.affiliation: Instituto Español de Oceanografía, Centro Oceanográfico de Baleares, Muelle de Poniente s/n, 07015 Palma de Mallorca, Spain. Electronic address: c.alomar@ba.ieo.es.
authors.forename: Carme
authors.initials: C
authors.lastname: Alomar
authors.affiliation: Instituto Español de Oceanografía, Centro Oceanográfico de Baleares, Muelle de Poniente s/n, 07015 Palma de Mallorca, Spain.
authors.forename: Salud
authors.initials: S
authors.lastname: Deudero
authors.affiliation: Institute for Environmental Protection and Research (ISPRA), Via Salvatore Puglisi 9, 90143 Palermo, Italy; Institute for Environmental Protection and Research (ISPRA), Laboratory of Ichthyology and Marine Ecology, Via dei Mille 46, 98057 Milazzo, ME, Italy.
authors.forename: Franco
authors.initials: F
authors.lastname: Andaloro
authors.affiliation: Institute for Environmental Protection and Research (ISPRA), Via Salvatore Puglisi 9, 90143 Palermo, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Castriota
authors.affiliation: Institute for Environmental Protection and Research (ISPRA), Laboratory of Ichthyology and Marine Ecology, Via dei Mille 46, 98057 Milazzo, ME, Italy.
authors.forename: Pierpaolo
authors.initials: P
authors.lastname: Consoli
authors.affiliation: Institute for Environmental Protection and Research (ISPRA), Via Salvatore Puglisi 9, 90143 Palermo, Italy.
authors.forename: Manuela
authors.initials: M
authors.lastname: Falautano
authors.affiliation: Institute for Environmental Protection and Research (ISPRA), Via Salvatore Puglisi 9, 90143 Palermo, Italy.
authors.forename: Mauro
authors.initials: M
authors.lastname: Sinopoli
mesh_terms: D000818:Animals; D044822:Biodiversity; D046068:Caulerpa / Q000502:physiology*; D017753:Ecosystem; D004784:Environmental Monitoring; D005399:Fishes; D020387:Food Chain; D060434:Herbivory; D058865:Introduced Species; D008522:Mediterranean Sea; D010473:Perciformes
keywords: Food web; Invasive alien species; Lessepsian; Mediterranean; Stable isotopes