Can UV radiation affect benthic deposit-feeders through biochemical alteration of food resources? An experimental study with juveniles of the benthic polychaete Eupolymnia nebulosa - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Marine Environmental Research Année : 2011

Can UV radiation affect benthic deposit-feeders through biochemical alteration of food resources? An experimental study with juveniles of the benthic polychaete Eupolymnia nebulosa

Audrey M Pruski
Jean-Claude Duchêne
  • Fonction : Auteur
Laurence Méjanelle
Gilles Vétion
Martin Desmalades
  • Fonction : Auteur
François Charles

Résumé

The growth, tentacle development and feeding activity of the benthic polychaete Eupolymnia nebulosa were examined to determine whether UV might affect marine deposit-feeders indirectly through the modification of the nutritional quality of their resources. Since marine invertebrates have higher nutritional requirements during the period following settlement, we tested the effect of UV-altered phytodetritus on freshly settled juveniles of E. nebulosa. Phytodetritus was prepared from cultures of the diatom Skeletonema costatum either grown under or sheltered from UVB radiation. Sterol content of phytodetritus was unmodified by UV radiation. Conversely, phytodetritus was noticeably depleted in polyunsaturated fatty acids. Growth and tentacle development of juveniles fed on altered phytodetritus were reduced by 35% and 15% respectively, suggesting potential deficiencies in essential nutrients. In response to the lower quality of the phytodetritus, juveniles explored a wider area as they search for food, a strategy that could compensate for low food quality.

Dates et versions

hal-02649939 , version 1 (29-05-2020)

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Sarah Nahon, Audrey M Pruski, Jean-Claude Duchêne, Laurence Méjanelle, Gilles Vétion, et al.. Can UV radiation affect benthic deposit-feeders through biochemical alteration of food resources? An experimental study with juveniles of the benthic polychaete Eupolymnia nebulosa. Marine Environmental Research, 2011, 71 (4), pp.266-274. ⟨10.1016/j.marenvres.2011.02.001⟩. ⟨hal-02649939⟩
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