title: Silver Nanoparticles Affect Functional Bioenergetic Traits in the Invasive Red Sea MusselBrachidontes pharaonis.
abstract: We investigated the functional trait responses to 5 nm metallic silver nanoparticle (AgNPs) exposure in the Lessepsian-entry bivalveB. pharaonis. Respiration rate (oxygen consumption), heartbeat rate, and absorption efficiency were evaluated across an 8-day exposure period in mesocosmal conditions. Basal reference values from not-exposed specimens were statistically compared with those obtained from animals treated with three sublethal nanoparticle concentrations (2μg L-1, 20μg L-1, and 40μg L-1). Our data showed statistically significant effects on the average respiration rate ofB. pharaonis. Moreover, complex nonlinear dynamics were observed as a function of the concentration level and time. Heartbeat rates largely increased with no acclimation in animals exposed to the two highest levels with similar temporal dynamics. Eventually, a decreasing trend for absorption efficiency might indicate energetic constraints. In general, these data support the possible impact of engineered nanomaterials in marine environments and support the relevance of functional trait assessment in present and future ecotoxicological studies.
authors: Dipartimento di Scienze ed Innovazione Tecnologica, University of Piemonte Orientale, Via Michel 11, 15121 Alessandria, Italy.
authors: Ilenia
authors: I
authors: Saggese
authors: Dipartimento di Scienze della Terra e del Mare, University of Palermo, Viale delle Scienze Ed. 16, 90128 Palermo, Italy.
authors: Gianluca
authors: G
authors: Sarà
authors: Dipartimento di Scienze ed Innovazione Tecnologica, University of Piemonte Orientale, Via Michel 11, 15121 Alessandria, Italy.
authors: Francesco
authors: 0000-0001-7945-3712
authors: F
authors: Dondero
mesh_terms: D000818:Animals; D049872:Bivalvia / Q000187:drug effects*; D004734:Energy Metabolism / Q000187:drug effects*; D004777:Environment; D006339:Heart Rate / Q000187:drug effects; D053768:Metal Nanoparticles / Q000008:administration & dosage*; D049879:Mytilidae / Q000187:drug effects*; D056152:Respiratory Rate / Q000187:drug effects; D012834:Silver / Q000008:administration & dosage*
chemical_list: D012834:Silver