Food selection of a generalist herbivore exposed to native and alien seaweeds

Tomas Vega Fernandez, Paola Gianguzza, Chiara Bonaviri, Salvatrice Vizzini, Simona Noè, Tomás Vega Fernández, Luigi Musco, Fabio Badalamenti, Fabio Badalamenti, Luigi Musco

Risultato della ricerca: Article

2 Citazioni (Scopus)

Abstract

Understanding which factors influence the invasion of alien seaweed has become a central concern in ecology. Increasing evidence suggests that the feeding preferences of native herbivores influence the success of alien seaweeds in the new community. We investigated food selection of a generalist native grazer Paracentrotus lividus, in the presence of two alien seaweeds (Caulerpa cylindracea and Caulerpa taxifolia var. distichophylla) and two native seaweeds (Dictyopteris membranacea and Cystoseira compressa). Sea urchins were fed with six experimental food items: C. cylindracea, C. taxifolia var. distichophylla, a mixture of C. cylindracea and C. taxifolia var. distichophylla, D. membranacea, C. compressa and a mixture of D. membranacea and C. compressa. P. lividus ingested all the combinations of food offered, though it preferentially consumed the alien mixture, C. cylindracea and D. membranacea. The alien C. taxifolia var. distichophylla was consumed significantly less than the other food items and, interestingly, it was ingested in a greater amount when mixed with C. cylindracea than when on its own. This finding suggests that C. taxifolia var. distichophylla may become vulnerable to sea urchin grazing when it grows intermingled with C. cylindracea, which does not gain immediate protection from the presence of the very low palatable congeneric seaweed. The present study highlights the potential role of native grazers to indirectly affect the interspecific competition between the two alien seaweeds in the Mediterranean Sea.
Lingua originaleEnglish
pagine (da-a)469-473
Numero di pagine5
RivistaMarine Pollution Bulletin
Volume129
Stato di pubblicazionePublished - 2018

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Seaweed
food selection
Caulerpa taxifolia
seaweed
food choices
generalist
macroalgae
herbivore
herbivores
Paracentrotus lividus
Echinoidea
food
Cystoseira
Caulerpa
feeding preferences
interspecific competition
Ecology
grazing
ecology

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Aquatic Science
  • Pollution

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Food selection of a generalist herbivore exposed to native and alien seaweeds. / Vega Fernandez, Tomas; Gianguzza, Paola; Bonaviri, Chiara; Vizzini, Salvatrice; Noè, Simona; Fernández, Tomás Vega; Musco, Luigi; Badalamenti, Fabio; Badalamenti, Fabio; Musco, Luigi.

In: Marine Pollution Bulletin, Vol. 129, 2018, pag. 469-473.

Risultato della ricerca: Article

Vega Fernandez, Tomas ; Gianguzza, Paola ; Bonaviri, Chiara ; Vizzini, Salvatrice ; Noè, Simona ; Fernández, Tomás Vega ; Musco, Luigi ; Badalamenti, Fabio ; Badalamenti, Fabio ; Musco, Luigi. / Food selection of a generalist herbivore exposed to native and alien seaweeds. In: Marine Pollution Bulletin. 2018 ; Vol. 129. pagg. 469-473.
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AU - Noè, Simona

AU - Fernández, Tomás Vega

AU - Musco, Luigi

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AU - Musco, Luigi

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